Vol 17, No 3 (2016)

Articles

THE MODEL OF METAL SPEED CONVECTION HEATING FOR USING IN ALGORITHMS OF THE CONTROL SYSTEM

Belolipeckii V.M., Piskazhova T.V., Portyankin А.А.

Abstract

A technological process of metal processing in space machinery contains such mandatory operation as the preparation of the raw material, its heating, rolling and finishing. Heating metal before rolling increases its ductility and improves physical and mechanical properties. Increased requirements apply to processing of titanium and aluminum alloys to temperature conditions of the initial, intermediate heating, annealing and artificial aging. Strict compliance with these requirements provides metal resistant to high and low temperatures, vibration loads and effects of radiation. One of the important ways to improve the process of heating metal mode is to introduce modern process control system of furnaces, which in turn requires energy-efficient and provides the specified requirements for the heating control algorithms. To correctly predict such algorithms it is necessary to use mathematical models of processes. The purpose of our work is to create a model for using in algorithms of process control system, which enables you to control speed convective heating of metal ingots. For testing and determination of the boundaries of the application of calculations on the model developed in ordinary differential equations were compared by us with the calculations for a reference model based on unsteady heat conduction equation. In this work materials with high heat and low thermal conductivity were examined. We use analytical and numerical methods for solving ordinary differential equations; analytical and finite difference solution of the third boundary value problem for the heat equation. A simplified model of heating materials in the furnace high-speed convection heating, built on ordinary differential equations and allowing at work as part of process control system to calculate speed and the heating mode, to assess of uniformity of heating of ingots to provide these data to the operator or to automatic decision to change the power input, or change the time heating, is offered.
Siberian Aerospace Journal. 2016;17(3):554-561
pages 554-561 views

IMPROVEMENT OF SPACECRAFT MIRROR ANTENNA AND ELECTRONIC CIRCUIT BOARDS RELIABILITY

Dvirniy V.V., Morozov E.A., Dvirniy G.V., Krushenko G.G., Karaban V.M.

Abstract

Improving the reliability of mirror antennas increasing in size when more and more strict requirements to the deviation of the sizes of a paraboloid, and the miniaturization of electronic modules and a seal mounting on circuit boards, are pressing challenges, the solution of which is associated with high precision measurements at ground-based experimental testing chamber, where the test object. The reliability is directly related to durability, which, in turn, depends on flowing in designs thermo-strength processes in the conditions of orbital flight. The theoretical results are confirmed by calculations in the process of ground testing. The main parameters determined during the experimental research are the relative deformation of the umbrella antenna or circuit boards at various points. For PCBs proposed to apply two mutually perpendicular stripes along and across the tabs on the sides and in thermal vacuum conditions to conduct precise measurement of displacement labels at different temperatures. Then at multiple magnifications on the microscope it is necessary to investigate the size of the microcracks, which can take for allowed deflection. Precision of measurements should be at most 1/3 size of the crack. The proposed method is an improvement of known methods of applying brittle coatings testcustomermap. You can also use methods based on the use of sensitive optical coatings and methods of holographic interferometry, which, however, usually not possible to measure the linear movement with the required accuracy, especially when a large number of controlled points. Using the results of work performed in practice, the design of mirror antennas and on-Board electronics for space applications will increase its reliability by reducing design trial and error, optimization of the operation modes in operation.
Siberian Aerospace Journal. 2016;17(3):562-568
pages 562-568 views

THE ALGORITHMIZATION OF THE DETERMINISTIC MODELS TECHNOLOGICAL CYCLES OF AUTOMATED CONTROL SYSTEMS

Kovalev I.V., Zelenkov P.V., Losev V.V., Khrapunova V.V., Efremova S.V.

Abstract

The article discusses the problems of optimization control systems, via the methodologies of system and network analysis. It is shown, that the existing method for analysis and correction for deterministic model technological cycles automated control systems are aimed at obtaining optimal component values of the vector time-based with the vector by implementation, also for determine the duration of the whole technological cycle control. As description of technological cycle control does not depend on the type of control complex attaching initial value of the vector time-based for the graph of technological cycle control. Each component of the vector time-based ti corresponds to a time attracting computing system component structure for solution of the problem located in the i-th vertex of the graph. Time-based vector completely determines the information interaction between the structural components of the network. Vector by implementation is also used, where hj is the time of the information processing tasks and control of technological cycle control, located at the beginning of the j-th arc, and given the structure of the computer system. In the analysis of the feasibility of technological cycle control is necessary to establish the feasibility of vector time-based on a computer system with a given structure for a given vector h. To implement the technological cycle control to a given computer system structure with a given time-based vector it is necessary and sufficient that the following conditions: if the i-th from the graph of technological cycle control outgoing the j-arc, incoming to v-th vertex, then the difference tv - ti should not be less than the time of the task in the i-th vertex. This correction algorithm makes sense, when the non-negativity conditions, termination condition, the logical sequence of conditions. For the criterion estimation of the results optimization - minimization the time control by the shortening of the blank timing windows, Dijkstra’s algorithm was offered and implemented. That algorithm adapted for the graph of technological cycle control in part the terminological interpretation - introduced the new term temporal path characterizing duration of the routes control on the parts of information map.
Siberian Aerospace Journal. 2016;17(3):569-574
pages 569-574 views

PERSPECTIVE TOPOLOGIES OF MULTIPROCESSOR COMPUTING SYSTEMS BASED ON THE CAYLEY GRAPHS OF GROUPS OF PERIOD 4

Kuznetsov A.A., Kuznetsova A.S.

Abstract

The definition of the Cayley graph was given to the famous English mathematician Arthur Cayley in the XIX century to represent algebraic group defined by a fixed set of generating elements. At present, Cayley graphs are widely used both in mathematics and in applications. In particular, these graphs are used to represent computer networks, including the modeling of topologies of multiprocessor computer systems (MСS) - supercomputers. Since this direction is actively developed. This is due to the fact that Cayley graphs have many attractive properties such as regularity, vertex transitive, small diameter and degree at a sufficiently large number of vertices in the graph. For example, such a basic network topology as the “ring”, “hypercube” and “torus” are the Cayley graphs. One of the commonly used topologies MCS is a k-dimensional hypercube. This graph is given by k-generated Burnside groups of period 2, which is denoted B ( k,2 ) . The group B ( k,2 ) has a simple structure and is equal to the direct product of k copies of the cyclic group of order 2. A generalization of the hypercube is a n-dimensional torus, which is generated by the direct product of n copies of the cyclic groups whose orders may be different. In this work, We researched the structure of the Cayley graphs of group B ( k,4 ) - Burnside k-generated groups of period 4 (and some their quotients). Then we compared these graphs with the corresponding toruses and hypercubes. The analysis is shown that the graphs B ( k,4 ) have better properties in comparison with hypercubes and toruses. Therefore, they deserve attention in the design of advanced topologies of MCS.
Siberian Aerospace Journal. 2016;17(3):575-578
pages 575-578 views

RESEARCH OF SELF-CONFIGURATING MODELS AND PROCEDURES OF GENETIC PROGRAMMING FOR FORMATION OF DECISION TREES IN PROBLEMS OF THE INTELLIGENT DATA ANALYSIS

Lipinskiy L.V., Kushnareva T.V.

Abstract

In this work mechanisms of a self-configuration of genetic programming algorithm for the automated decision trees formation are investigated. Known, and well proved in tasks self-configurations of genetic algorithm, the Population-Level Dynamic Probabilities (PDP) and Individual-Level Dynamic Probabilities (IDP) model are considered. At the expense of a procedures community of evolutionary operators of the choice these approaches are rather just generalized on all evolutionary algorithms in general and on algorithm of genetic programming in particular. However, the specified procedures are limited in the choice of a configuration and management of the evolution course. Such ways of development of evolutionary search as restart, introduction to population of new casual individuals, cardinal change of parameters and change of search resources (addition of iterations, expansion of population, etc.) are hard to include in PDP and IDP. Besides, decision-making process, i. e. change of a configuration of search algorithm, is hidden from the user. The user can observe only results of this choice. In the offered work alternative approach to a self-configuration of evolutionary algorithms by means of the fuzzy controller is considered. Procedure of decision-making and management of a search configuration in fuzzy logical systems is similar to a reasoning of the expert and is easily generalized on the majority of ways and settings of evolutionary search which are applied in the work by the experienced user. Besides, the user can include those heuristic rules and procedures which uses in the practice in the fuzzy controller. In the work the basic possibility of application of an fuzzy control system for a self-configuration of genetic programming algorithm in a problem of the automated formation of trees of decision-making is shown. The minimum set of fuzzy rules and linguistic variables allowing operating evolutionary search is offered. Potential of the fuzzy controller and a way of increase of self-configuration procedure efficiency are discussed. Comparison of self-configuration procedures efficiency is carried out on practical tasks: classifications of irises of Fischer and forecasting of side effects at treatment of epilepsy. The analysis of the statistical importance of distinctions in efficiency of approaches is carried out, and results are discussed. The hybrid evolutionary algorithm of the automated formation of decision trees on the basis of genetic programming with the realized procedures of a self-configuration can be applied in various areas including in space-rocket branch.
Siberian Aerospace Journal. 2016;17(3):579-586
pages 579-586 views

CALCULATION OF COMPOSITE CYLINDRICAL SHELLS USING MULTIGRID ELEMENTS

Matveev A.D., Grishanov A.N.

Abstract

Calculating the three-dimensional elastic composite cylindrical shells with different coefficients of fullness that is reduced to the construction of discrete models consisting of complex curvilinear multi-grid finite elements has been proposed. The basis of such elements construction is curvilinear double-grid finite elements. Double-grid and complex multi-grid elements are designed based on the basic finite element models of composite shells which take into account their heterogeneous structure and have high dimension. Constructing the curvilinear double-grid and complex multi-grid elements in the local Cartesian reference systems has been shown. Displacement fields are interpolated by known degree polynomials of various orders, the stress state is described by the three-dimensional elasticity problem (without introduction of the simplifying hypotheses on the nature of the displacement fields, strain and stress distribution). Approximating polynomials and the equations of three-dimensional elasticity problem are recorded in the local Cartesian reference systems. Advantages of the proposed elements are that they describe the three-dimensional stress state in composite shells, take into account their heterogeneous structures, complex fixing and generate multi-grid discrete models with a small number of nodal unknowns. The dimensions of multi-grid discrete shell models are by several orders less than the dimensions of the basic ones. Time spending of the finite element method (FEM) realization on a computer for discrete models of multi-grid composite shells is significantly less than for the basic models. A complex multi-grid element of the 3rd order to calculate the composite cylindrical shells is proposed. The FEM calculation example of cantilever sandwich shell using complex multi-grid elements of the 3rd order has been given. Shell calculation results show the high efficiency of the proposed complex elements.
Siberian Aerospace Journal. 2016;17(3):587-594
pages 587-594 views

ON THE CONTROL BY H-PROCESSES

Medvedev A.V.

Abstract

The paper considers the control problem of discrete-continuous processes with a “tubular” structure in the space of input-output variables. The similar processes occur in spaces of the fractional dimension. The modeling and control by this class of processes differ very much from the conventional parametric models that are surfaces in the same space. It is necessary to apply the appropriate non-parametric indicators for the development of the learning parametric models of the “tubular” processes. The multidimensional H-process includes both controlled and uncontrolled vector variables; the uncontrollable input variables are supervised while the operation of the multidimensional system. The defining impact is also a vector. It is necessary to coordinate the vector components of the defined controls but not to define them randomly as it is applied in practice of the automated control theory. As a result the necessity for synthesis a -controller but not a -controller arises. Firstly, it is necessary to allocate a certain intersection area of all H-processes for each component of the output variable the corresponding indicator which is applied for. As a result, we get some subarea of coordination in the space of input-output variables. Only from this subarea one can determine the defining impact for each component of the output of the multidimensional system. The following stage is the calculation of the defining impacts with a fixed vector value of the input uncontrolled variables. We analyze the case when the defining impacts for the component of the output variables are not possible in a particular situation to agree absolutely or partially. Algorithms of component definitions of a vector of the setting influences are given. Also nonparametric control algorithms for the multidimensional H-processes are given. As a result such a control unit can be referred to a matrix control systems. Thus, the latter is implemented as the algorithm for determining the defining impacts and a control algorithm by the object. It is a -controller (a control system) for the multivariate H-process. Of course there might be cases when H-processes according to all components of the output are disjoint. In such a situation it is necessary to search for the acceptable compromise to bring the state of the controlled process to the desired one.
Siberian Aerospace Journal. 2016;17(3):595-601
pages 595-601 views

MODELING OF RESOURCES MANAGEMENT SYSTEM OF HETEROGENEOUS DISTRIBUTION SYSTEM OF INFORMATION PROCESSING ON THE BASIS OF MULTIAGENT APPROACH

Ontuzheva G.A., Antamoshkin O.A.

Abstract

The article is devoted to the structural modeling of resource management of heterogeneous distribution systems of information processing based on multi-agent approach of the design of distributed information systems. In the introduction of the article the urgency of the problem for the decision-making process is proved. We describe the main difficulties encountered when we make informed and timely decisions at forecasting and disaster management on the scale of the Russian Federation. Further objective of the study is formed, and the tasks required to achieve it are described. Starting with a description of the distinguishing features of the unified state system of prevention and liquidation of emergency situations of the Russian Emergencies Ministry, the authors come to the conclusion that the system fits the generally accepted concept of heterogeneous distributed information processing system. Below, the construction of multi-agent approach to resource management of heterogeneous distributed information processing system as the least costly financially, and meets the necessary criteria is justified. In the body of the article a complete description of levels built models such as the - level of intelligent agents, the level of computer equipment agents, route management level is given. The structure of the system is described. The article details the typical functionality of the following: a software component management agent compute node load monitoring agent and monitoring agent communication channels, data transfer agent, load balancing agent, agent utilization of communication channels forecasting reactive agent of the primary data sources. At the end of the work the possibilities of further development of the model, as well as the conclusion about the necessity of its algorithmization for practical testing and implementation in practice are considered.
Siberian Aerospace Journal. 2016;17(3):602-610
pages 602-610 views

A METHOD TO FORECAST THE RELATIVISTIC ELECTRON FLUX AT GEOSTATIONARY ORBIT

Potapov A.S., Ryzhakova L.V., Tsegmed B.

Abstract

Fluxes of relativistic electrons of the outer radiation belt present a serious threat for on-board electronics of spacecraft orbiting in geosynchronous orbit. This requires development of methods to predict energetic particles in this region of near-Earth space. In this paper, we propose to build a forecast based on the multiple regression (MR) model. Currently, one operating method of relativistic electrons forecast is known. It is displayed on the website of the US National Oceanic and Atmospheric Administration (NOAA). However, it is based on a single predictor, average solar wind speed, and can not accurately predict the sudden changes in particle fluxes during disturbances. In fact, for a successful prediction one must take into account all the complex processes of replenishment of the outer radiation belt due to the acceleration of seed electrons as well as processes of the devastation of the electron flux in the geosynchronous region due to outward adiabatic transport and outward radial diffusion. For this purpose, we have to involve a variety of parameters as predictors measured both at the surface and in the solar wind. The main parameters that correlate with energetic electron fluxes are well known: the solar wind speed, density and dynamic pressure of the interplanetary plasma, the intensity of ULF oscillations in front of the magnetosphere and on the ground, the flow of seed electrons (of hundreds eV energy) at geosynchronous orbit. We have added to them the magnetic field at geostationary orbit and the interplanetary electric field. Coefficients in the MR model equation are calculated from experimental data by the least squares method. The tests showed good results of the proposed forecast model, including prediction of the flux behavior in response to the effect of high-speed solar wind streams on the magnetosphere.
Siberian Aerospace Journal. 2016;17(3):611-617
pages 611-617 views

THE TECHNIQUE OF SYNTHESIS OF REGULATORS TO CONTROL OBJECTS OF THE SECOND ORDER

Prokopev A.P., Ivanchura V.I., Emelyanov R.T., Scurihin L.V.

Abstract

The research examines the technique of synthesis of the PID controller control systems for objects of the second order, characteristic of mobile, construction and road-building and road-building machines. As the theoretical basis the modal method is considered for linear systems with respect to the location of the actual poles. The results of analytical research that establishes the influence of the poles on the range of variation of the transient response are given. The analytical expressions defining the values of the components of the transient characteristics of the closed-loop automatic control system with object of the second order have been taken. Expression for calculating the coefficients of the PID regulator, including coefficients of the transfer functions of second order with given value of the actual poles have been defined. The techniques on a concrete example in the environment of Mathcad have been checked. Using the proposed method characteristic features of the influence of model input factors impact on the transition process have been revealed. Simulation showed that at a certain value of the coefficient of the first derivative in the numerator of the transfer function is not zero; the initial value of the transient response will be included in the 5 % zone steady-state value. This suggests the possibility of a significant reduction of the transient time.
Siberian Aerospace Journal. 2016;17(3):618-624
pages 618-624 views

Smoke Segmentation in VIDEO sequences

Pyataeva A.V.

Abstract

Smoke detection in outdoor scenes using video sequences is particularly important for early warning systems because smoke usually rises before flames arise. Dynamic texture features of smoke are color, shape, motion, transparency, texture. The paper presents a smoke-detection method for outdoor spaces early fire-alarming based on video processing using color, shape and motion features. The proposed approach includes two stages. Firstly, local smoke regions are detected based on motion estimation and chromatic analysis. The clustering of such local regions provides global smoke regions in a scene. At this stage, smoke and non-smoke regions are analyzed in order to exclude errors of false rejection. The suspicious region is extracted by using block-matching algorithm. Secondly, global regions are verified by using statistical and temporal features. In this research, smoke colored blocks and turbulence characteristics. For experimental researches the database of dynamic textures Dyntex and database of Bilkent University were used. Dense smoke, transparent smoke, and non-smoke videos have been used for testing the proposed method. The developed method of smoke detection on video provides 97.8-99 % of accuracy for smoke sequences. Smoke was detected without false alarms in three burns. The most remarkable aspect about the results is the algorithm’s ability to filter motion other than smoke. In fact, it can be seen from the image sequences extracted that two potential sources of false alarms like the movement of tree leaves due to wind and the movement of people crossing the scene are mostly filtered. The alarms are therefore undoubtedly triggered by the smoke arising from the burns. Smoke video image was performed to verify in experiments, the results have proved the validity of the method proposed in this paper.
Siberian Aerospace Journal. 2016;17(3):625-630
pages 625-630 views

EMBEDDING OF DIGITAL WATERMARKS TO FREQUENCY AND SPATIAL AREAS OF THE IMAGE

Savchina E.I.

Abstract

Embedding of digital watermarking (DWM) is a technology of hiding messages in the digital signal (for example image, audio, video). It provides transferring of important information in the workflow system in production. Any digital signal may be used by the way of hiding information. The type of the signal affects the process of conversion only. This technology is applicable for system of workflow including aerospace industry. Through digital watermarks the important message can be transmitted, system information can be hidden in documents. DWM can help to protect contents of document including images and snapshots. In the paper as content static images were used, as transmitted information text messages were used. The digital image may be considered as a set of pixels with various brightness and colorfulness, so we can operate with it. Also we use frequency image’s domain, where we can manipulate with frequency coefficients to hide user’s information. Both approaches are widely used in marking technology. In the work process spatial method Least Significant Bit and frequency method of Koch-Zhao were used. These methods were compared by using quality assessments for resulting images which contains a digital mark. Numerical results were obtained by using known metrics: structure similarity and peak-signal to noise ratio. Experiments show the advantages of spatial methods against frequency algorithms in the cases when filled image was not exposed by distortion before a moment of extraction information message. In all other cases frequency methods are appropriated.
Siberian Aerospace Journal. 2016;17(3):631-637
pages 631-637 views

DETERMINATION OF DYNAMIC PARAMETERS OF THE DRIVE OF THE EXPERIMENTAL STAND FOR RESEARCH OF CARDAN TRANSFERS

Struchkov A.V., Kukushkin E.V., Eresko S.P., Eresko T.T.

Abstract

Obtaining reliable dynamic parameters of elements at design of transmission systems for the purpose of effective decrease in dynamic components of torsional fluctuations is the major task. The results of physical and mathematical modeling of transmission systems of drives of transport processing equipment of land means of ensuring of flights of aircraft containing cardan transfers are given. The settlement chain multimass torsional and oscillatory dynamic model is developed for carrying out theoretical researches and the analysis of internal dynamics of the drive of the stand and the key dynamic parameters of her elements are determined. Methods of pilot studies of the key dynamic parameters of elements of the drive of the stand are shown, the analysis of research of total tortional rigidity is provided and its components - torsional stiffness of shaft, contact stiffness splined of the connections given to torsional stiffness of shaft, flexural stiffness of shaft together with stiffness of the support and gear gearings given to torsional stiffness of shaft the ratio of various components of a pliability in balance of a torsional pliability of the check point of the drive of the stand on each of four transfers is defined. Realization of mathematical model by means of the author’s APM GYDROTRAS II program is shown. The conducted researches are directed to receiving a hardware and software system for improvement of problems of design of shaft lines, taking into account their behavior in operation with use, both virtual instruments of modeling of the load modes, and real researches and operational development by means of the experimental stand and the offered technique of scientific researches that as a result will allow to reduce considerably expenses of time for design with simultaneous improvement of quality of the made design decisions, and also will allow investigating already designed drives for the purpose of optimization of their constructive and regime parameters.
Siberian Aerospace Journal. 2016;17(3):638-644
pages 638-644 views

FREQUENCY ANALYSIS OF THE LONGITUDINAL AND TRANSVERSE VIBRATIONS OF LATTICE CYLINDRICAL SHELL WITH OPENINGS

Shatov A.V., Khakhlenkova A.A.

Abstract

For over thirty years composite lattice cylindrical shells with high specific strength and stiffness are used in rocket and space technology. Lately composite lattice cylindrical shells are widely used as casings of spacecrafts. Lattice shell is the supporting structure to which devices and spacecraft mechanisms are attached. One edge of this shell is attached to the launch vehicle through the adapter. Today lattice cylindrical shells which used as casings of spacecrafts do not have cutouts and holes in their structure. This fact is significantly complicates the installation of equipment, docking of connector cables and pipes located inside the lattice cylinder.Obviously, the presence of openings in the shell facilitates the installation of equipment,but at the same time affects the stiffness characteristics of shell. This article describes an algorithm for creating a finite-element model of lattice cylindrical shell with openings made by composite material. The problem of determining the first frequency of the longitudinal and transverse vibrations for shell, one end of which is rigidly fixed and on the other end is attached an absolutely hard disk, is solved. It is analyzed the influence of the hole size and stiffness of bordering rib on the magnitude of the first frequency. Values of the first frequency of the longitudinal and transverse vibrations for lattice shell with openings of different sizes are shown.Graphs of the first frequency of the longitudinal and transverse vibrations depending on the width of the bordering rib are presented. The value of the first frequency of the longitudinal or transverse vibrations of shell is a characteristic of rigidity of the structure.Therefore, modal analysis results allow us to draw some conclusions about the impact of openings on the stiffness parameters of the lattice shell.Obviously, the openings decrease the first frequency of the longitudinal and transverse vibrations of shell. Bordering rib improves the rigidity of shell with openings.With increasing the width of the rib there is an increase the respective first frequency oscillations.Influence of the width of bordering rib the more noticeable than the larger size has an opening in the lattice structure.The obtained results can be used in designing of power constructions in spacecrafts.
Siberian Aerospace Journal. 2016;17(3):645-653
pages 645-653 views

EXPERIMENTAL INVESTIGATION OF SEALING RUBBER PROPERTY AT HIGH AND LOW TEMPERATURES

Asheichik A.A., Polonsky V.L.

Abstract

In the nodes of aerospace engineering fixed and movable seals made from rubber are widely used. It is also known that the operation of nodes of rocket and space technology comes in a very broad range of both low and high temperatures. Therefore, the calculations of fixed and movable seals of such nodes depending on the elastic constant temperature and temperature effect on the coefficient of friction of rubber must be considered. Otherwise emergence of leaks through seals is possible at low temperatures, and at high temperatures there can be its destruction. The technique studies flexural modulus of the rubber samples in a wide range of temperatures and the bending deformation. The technique of the coefficient of friction of rubber research in friction against steel and fluorine-containing coatings at low and high temperatures is given. Friction coefficients were defined at a one-way rotary motion of flat samples at a speed of sliding of 0.2 m/s and pressure upon friction surfaces from 0.8 to 50 MPa and the range of temperatures from - 40 to 120 °C. The temperature dependences of the static elasticity module at a bend in the range from - 70 to 100 °C for five compositions of butadiene-nitrile rubbers are established as a result of experimental studies. Also results of the temperature test imitating change of contact stress in seal after installation at 20 °C and the subsequent cooling, and also temperature test, when after cooling deformation of a bend is increased, are given. The temperature dependences of friction coefficient rubber on fluorinated coverings of three types and steel in the wide range of negative and positive temperatures are experimentally received.
Siberian Aerospace Journal. 2016;17(3):656-664
pages 656-664 views

ACCELERATED UNWINDING OF THE ROTOR BOOSTER PUMP OF LIQUID ROCKET ENGINES UNDER START-UP CONDITIONS

Belayev E.N., Vorobyev A.G.

Abstract

In this article there is the assessment of possibility and effectiveness of accelerated unwinding of the rotor booster pump of liquid rocket engine under start-up conditions. A method for reducing the error of rate in the unwinding of the booster pump and turbopump units is based on the organization in the process of starting the engine with supplying additional working liquid to the turbine of boost directly from the output of the pump of the oxidizer. There is a rocket engine, working on the components of the liquid oxygen - kerosene, made according to the scheme of oxidizer generator gas with afterburning. During rocket engine start-up and turbopump rotor unwinding, the maximum pressure in the engine is realized at the outlet of the pumps. When starting the engine using additional liquid driving, which starts earlier than the gas driving, the boost pump acceleration occurs much earlier. To analyze this problem, a dynamic mathematical model of the rocket engine is using. The goal of the calculation is to study start-up process of rocket engine to select the static parameters of liquid driving line, providing engine start under the lowest possible components on the pressure in the engine inlet. Among the parameters, that affect the operation of the liquid driving, the inertial pressure losses selected in the line supplying the additional working liquid to the turbine of boost pump. Mathematical modeling of engine start-up in the absence of liquid driving, and at present, but with different characteristics of the driving line was conducted. The efficiency of the use of preliminary unwind of oxidizer boost pump by additional liquid component, coming directly from the output of the pump the oxidizer is shown. The influence of the value of the area of the nozzle section of the liquid driving and inertial losses of pressure of additional oxidizer line on the effectiveness of unwinding of the rotor booster pump of liquid rocket engine when engine start was conducted.
Siberian Aerospace Journal. 2016;17(3):665-672
pages 665-672 views

The method OF compensation OF construction deformation for lagre spacectaft antenna

Bikeev E.V., Jakimov E.N., Matylenko M.G., Titov G.P.

Abstract

The method of compensation of construction deformation for a spacecraft transformed antenna is proposed within the application of a two freedom degree turn drive, located in the attachment point of a load-carrying structure with a reflector. The method allows compensating the antenna ration-technical characteristics degradation, caused by antenna structure deformation. In particula one of the deformation constituents is compensated as a shift main beam of the anglular pattern, relative to the nominal location in the spacecraft coordinate system (the location, demanded for a full value antenna functioning for the indentend application). The corresponding mathematical simulation was carried out, and as a result the efficiency of the method by example of an umbrella type offset antenna with 12 meters diameter is proved. While simulating the spacecraft is located on a geostationary orbit when the location of the Suns corresponds to the equinox position. The deformation compensating in sixteen position of a spacecraft on orbit was ceried out, which corresponds to maximum of antenna construction deformation (significant cases). The significant cases location belongs to one turn driving of a spacecraft on the orbit. The input data of calculation were the result of the antenna construction temperature analysis, with NII PMM of TGU in particularized software names ANSYS were cerried out. During the temperature analysis the directing sun radiation heating only takes into account. The major point of the method application is discussed referred to the spaceborne system of performance charactiristics control for large size transformed antenna, as well as the possible solution methods are considered.
Siberian Aerospace Journal. 2016;17(3):673-683
pages 673-683 views

REACTION FLYWHEEL FOR THE SMALL SPACECRAFTS

Ermakov D.V., Denisova A.A., Kolevatova N.A., Gladyshev Y.G.

Abstract

One of the main issues in the design of low-sized reaction flywheel was the selection of bearings, because there are strict limits on the size and weight of the device that allows using only ultra-light series of ball bearings. At the preliminary stage of design calculations verification of safety factors for loads in mechanical tests and of flexural strength of axis for mechanical testing identifying by critical sections was carried out. Rotor system of low-sized reaction flywheel consists of a flywheel mounted on the outer rings of ball bearings, inductors, and the rotor’s magnet of the rotor position sensor. The most dangerous moment is the unbalance of the rotor system as there is a direct link between the dynamic loads and the level of contact pressure between the bearing balls and raceways. Upon reaching significant values of these stresses flaking on the tracks and rolling elements is possible. Furthermore, the pressure unbalance inevitably causes the flywheel shaft of the friction force and hence heat, which leads to an increase in drag torque of the rotor, and also accelerates the aging process lubricant. In accordance with the general requirements imposed on the rotor system of low-sized reaction flywheel it was subjected to dynamic balancing, because only this type of balancing ensures the elimination of all types of unbalances with the required accuracy. To carry out this process step the rotor system has two correction planes located on the rim of the flywheel in the areas of maximum distance from the axis of rotation. Balancing is carried out by removing material in the areas of the annular grooves of the correction planes. Comparing the characteristics of low-sized reaction flywheel and foreign analogues shows that the parameters correspond to foreign models.
Siberian Aerospace Journal. 2016;17(3):684-690
pages 684-690 views

STRUCTURE OF DEPLOYABLE SPACE PARABOLIC-REFLECTOR ANTENNA

Kazantsev A.A.

Abstract

One of the basic requirements to parabolic-reflector aerials is observance of requirements on execution of the set curvature of a form-building surface. In case of transformed aerials when the reflecting surface finishes and stretches while deploying, this requirement is supplied with high rigidity of a structure. At low rigidity mutual geometrical displacement of the interface points of attachment of a reflecting cloth to a structure is inevitable that attracts to deviations of the form of a reflecting surface from nominal. Another major aspect of designing of space engineering is decrease in final weight of a product. The most typical line of designing of various systems of space vehicles is compromise search between decrease in weight of a product, and, as consequence, decrease rigidity and strength properties of a structure. In the article the proposed option of a design of a transformed parabolic-reflector aerial is offered. The basic load-bearing element is thin-walled composite torus, divided into some segments. Selection of the given type of a structure is proved by two kinds of analyses: the kinematic analysis of a deployment from a shipping rule in working, and the mechanical analysis for reliability acknowledgement on strength. The parametric analysis of geometry of a design is carried out, optimum versions are shown. For deeper optimization of design parameters it is necessary to carry out the following engineering analyses which have been not presented within the limits of the given article: - the analysis of reliability of a deployment of mechanical devices; - the modal analysis; - the analysis of temperature deformations and so forth. The given design can be applied as the power basis to parabolic-reflector aerials, screens, and cluster orbital systems.
Siberian Aerospace Journal. 2016;17(3):691-701
pages 691-701 views

AUTOMATED SIMULATION SYSTEM OF ELECTRICAL CHARACTERISTICS OF SPACECRAFT POWER SYSTEM

Mizrah E.A., Poymanov D.N., Balakirev R.V., Tkachev S.B.

Abstract

In the article authors examined problems of electrical tests of spacecraft electrical systems (SES) with special simulation systems to reproduce electrical characteristics of spacecraft power system (PSS ECSS). The relevance of these systems and disadvantages of known simulators are discussed. A new automated system, which can be used to carry out SPS electrical tests in work and emergency modes, study noise immunity of spacecraft electrical systems with given noise magnitude, frequency and shape is considered. ECSS provides stable 27 and 100 V power to SES and contains two special power supplies (ISEP) providing main functions and control computer. In the article the authors show that combining regulated power supply and noise signal generator in ISEP leads to significant topology simplification, improvement of operation characteristics and better reproduction of spacecraft power system impedance frequency characteristics. In the article topology of PSS simulator with output voltage range up to 100 V (ISEP-100), containing constant voltage supply, output voltage regulator, multifunctional low-latency protection device (LLPD) and digital control and measurement system, is examined. Output voltage regulator based on dual power regulation topology, which can provide required static and dynamical properties and satisfactory specific power. Continuous voltage regulator (CVR) provides energy quality, reproduce required impedance frequency characteristics of onboard SPP, allows to induce test signals of required shape on power bus in frequency range up to 1 MHz; Switching regulator limits power dissipation of CVR by voltage regulation on CVR transistor current regulator. Developed and studied LLPD, which is able to shut down SES on overvoltage and overcurrent conditions above specified levels and provides AC network phase loss detection. LLPD delay can be defined in range 2 to 1500 us. Developed PSS ECSS allows carrying out entire program of spacecraft electrical systems tests and operated in Academician M. F. Reshetnev Information Satellite Systems, Zheleznogorsk, where it was used for onboard repeaters tests of various spacecrafts.
Siberian Aerospace Journal. 2016;17(3):702-709
pages 702-709 views

DEVELOPMENT OF THE PROPULSION CONSTRUCTION AND THE TRAJECTORY FOR THE SPACECRAFTS OF THE “LAPLACE-L” MISSION FOR THE STUDY OF THE JUPITER PLANETARY SYSTEM

Platov I.V., Simonov A.V.

Abstract

The article is devoted to the peculiarities of the development of the space complex for the study of the Jupiter planetary system with contact and remote methods at the proposal stage. Russian ambitious project “Laplace-L” involves the development and launch of a single launch window two spacecrafts, designed for remote and contact research of the Ganymede, a natural satellite of Jupiter. At the heart of the first spacecraft of the mission there is an orbiter. One of its tasks is mapping the surface of Ganymede from the orbit of an artificial satellite and the collection of data to select the landing site of the second SC, which includes lander. The article describes the design appearance of the devices, their propulsion systems and the flight scheme at all stages - from the launch from the Earth to landing on Ganymede. The article describes the implementation for the mission of proposed main propulsion engines (MPEs), as well as propulsion engines of the orbiter and lander, adducted the descriptions of their designs. In accordance with the characteristics their flight scheme has been designed to allow the SC to deliver during the active life in orbit with the required parameters around a natural satellite of Jupiter and in the subsequent implementation of a soft landing on the surface of Ganymede. The main characteristic of the trajectories is adducted. The project must be developed on the basis of the launch of the spacecraft from the Baikonur Cosmodrome using a launch vehicle “Angara-A5” and the “KVTK” upper stage. When developing the scheme of the flight is assumed that after 8 years of apparatus should enter orbit around Ganymede. The flight trajectory to Jupiter formed by gravity assists maneuvers near the Earth and Venus. The proposed construction variants of spacecraft allow realizing the designed trajectory, while providing a full-time job for science equipment and carry out a set of experiments for a specified period of active existence of “Laplace-L” spacecrafts.
Siberian Aerospace Journal. 2016;17(3):710-721
pages 710-721 views

A MECHANISM FOR TELESCOPIC EXTENSION OF REFLECTOR’S TUBULAR SPOKES AND SHAFTS

Skokov D.V., Khalimanovich V.I., Verkhoglyad A.G., Nakrokhin I.A., Chugui Y.V.

Abstract

A large-size antenna’s reflector working at geostationary earth orbit has an approximate diameter of 48 meters while requires development of a special extension mechanism for its telescopic tubular spoke deployment. The most important requirements are the following: weight less than seven kilograms, power consumption ( ), movement along the longitudinal axis of the spokes at a distance of more than eight meters and an axial force of at least 2000 N. The results on the development and creation of a new mechanism for link spokes telescopic extension for large-size transforming reflector are presented. The descriptions of extension mechanism as well as the principle of its operation and testing results under industrial conditions at JSC “ISS” are given. The working principle of the special extension mechanism is based on the movement of two disks along curved trajectory inside the tubular surface of stationary part of the spoke. Mechanical catching of moving parts is based matching the pins installed on disks against junctions located on the stationary part on the spoke. TDI SIE SB RAS had developed and produced the mechanism for the link spokes telescopic extension of reflector with 48 m in diameter. Such mechanism has been successfully tested at JSC “ISS”. Technical characteristics and the tests results of the mechanism for the link spokes telescopic extension of reflector and shafts in the composition of spokes demonstrate that the developed mechanism fully meets all requirements. The developed original mechanism for telescopic extension of reflector’ link spokes and shafts is highly reliable, has a good mass-dimensional characteristics (mechanism mass is less than 7 kg). Extension mechanism implements significant efforts (the efforts of 200 kgf) in the axial direction without significant effort in the radial direction and it allows for repeatedly reversing the movement of the links without adjustments and settings. Only single electric motor is used in the design of extension mechanism at all stages of spokes disclosure. The created extension mechanism can be applied to any telescopic systems. It can be used as a means for various devices displacement in long (virtually unlimited length) pipelines.
Siberian Aerospace Journal. 2016;17(3):722-728
pages 722-728 views

IMPROVING THE EFFICIENCY OF MULTIFUNCTIONAL ELECTRIC ROCKET ENGINES

Trifanov I.V., Kaz’min B.N., Oborina L.I., Trifanov V.I., Savel’eva M.V.

Abstract

Nowadays the creation of multifunctional electric rocket engines, working on several modes, providing the required specific thrust, specific impulse and energy efficiency is of immediate interest. These parameters can be ensured at work in pulse-detonation, pulsed or pulsed and the electric mode. The process of power generation is important with this approach. Reducing electricity costs on the ionization electric discharge of the combustion products, the formation and acceleration of plasma on different modes electric propulsion requires the development of new and effective technical solutions. One solution is to increase energy efficiency in the known method of creation and the electric traction, is to form a stream of combustion of hydrocarbon, chemical, or nuclear fuel, moving at a given speed in a magnetic field induction vector which is orthogonal to the vector products of combustion rate by dividing the flow of combustion products cations beams and electron beam. The energy of the electron beam is converted into an additional electrical power is directed to the acceleration, the speed of change of the cations of the beam, which creates a reaction force proportional to the kinetic energy of the accelerated beam. Acting on the cation beam pulsed electromagnetic field with the desired operating frequency, you can create a periodic pulse detonation waves and the work of ERE in the pulse-detonation or pulse-pulsed modes. Bunches of cations of the nozzle exit can be neutralized by recovering their energy in an electrostatic electricity and electric power. The proposed method and model of the power supply system may improve efficiency, fuel economy and other consumables increases the ratio of payload range and the life of the aircraft.
Siberian Aerospace Journal. 2016;17(3):729-737
pages 729-737 views

SOLAR THERMAL PROPULSION WITH DIFFERENT TYPES OF CONCENTRATOR-ABSORBER SYSTEM

Finogenov S.L., Kolomentsev A.I., Nazarov V.P.

Abstract

Solar thermal propulsion (STP) with high-temperature concentrator-absorber system (CAS), as a power source, is observed. Ordinary observed STP with simple single-stage isothermal absorber-heat exchanger, executed as an absolute black body, requires high accuracy of reflecting surface of solar mirror-image concentrator and high-precision tracking conditions to the Sun on active legs of multi-burn injection trajectory. Reduction of these requirements is possible at use of CAS with organization of non-uniform heating of hydrogen in absorber which temperature corresponds to exponential law of distribution of radiant flux density in focal sunlight spot. Energetic efficiency of such CAS is higher in comparison with the isothermal one. Single-stage, double-stage and extreme-not isothermal (multi-stage) CAS are considered. Results of simulation of STP with the considered CAS for upper stage application in mission of non-coplanar payload transfer from LEO to GEO are shown. It is shown that ballistic efficiency of solar upper stage with the considered STP can more than twice exceeds capabilities of modern liquid-propellant upper stages. Comparison of ballistic efficiency of STP use with different CAS as means of inter-orbital transportation is carried out. It is shown that the efficiency rises with increase of ratio of non-uniformity of hydrogen heating in sunlight absorber-heat exchanger and can be 30 % higher as compared to ordinary STP use. Such relevant CAS parameters as accuracy parameter of mirror-image concentrator and hydrogen heating temperature in the absorber-heat exchanger are considered. Optimal relevant parameters for criterion of maximum of payload mass for the considered CAS types are determined, and recommendations for their choice with technological restrictions are suggested. Dimensional parameters of concentrators for the cases of isothermal and staged absorbers are shown. Conditions of orientation to the Sun for the different CAS are observed. It is shown that requirements to the Sun tracking system in dynamic orientation mode can be quite provided by modern hardware components, especially in the case of non-uniform heating of hydrogen.
Siberian Aerospace Journal. 2016;17(3):738-747
pages 738-747 views

DOUBLE-CONIC ADAPTER FOR LAUNCHING THE BLOCK OF THREE SPACECRAFTS

Khakhlenkova A.A.

Abstract

Group launching of several spacecrafts by the use of one launch vehicle is the difficult engineering task. The solution of this task will allow cutting down considerably expenses on formation of the orbital group consisting of a set of the same spacecrafts. In this task the main question demanding careful study is a connection of the block of spacecrafts with the carrier rocket. Traditionally integration of both the single spacecraft, and the block from several devices with the carrier rocket is carried out by means of the so-called separating device. Integral part of this device is the adapter - the transitional design serving for placement of various elements of the separating device (such as locks, pushers, clamping and rotary devices) and rigid connection of the spacecraft or the block of spacecrafts with the carrier rocket. This construction receives the loadings arising at ground operations and transportation and also at starting of the carrier rocket therefore it has to possess high rigidity and durability. Now the metallic truss construction is used for a carrying into orbit of the block of three spacecrafts. This truss represents a set of the fittings connected among themselves by hollow aluminum pipes. Such construction possesses a number of essential shortcomings. In the article essentially new adapter is offered. Its construction having rather small weight and high rigidity thanks to using the modern composite materials allows distributing evenly load on the carrier rocket's interface points. The production technology of elements of such construction is worked off on many Russian spacecrafts. The parametrical analysis of the offered adapter construction is carried out. The ways of increase of rigidity of the adapter are shown: using of materials with the high module of elasticity, changing of thickness of coverings of the panel, and also changing of parameters of lattice structure of conic shells. Also preliminary estimate of mass of the offered construction is made.
Siberian Aerospace Journal. 2016;17(3):748-759
pages 748-759 views

The prospects for improving the performance of Electromechanical Executive body of the spacecraft

Kholodilov S.V.

Abstract

Currently, systems of orientation and stabilization of spacecraft are widely used in Electromechanical Executive bodies (EMIO). Electromechanical Executive body has a high accuracy of orientation and does not require the working fluid for its operation. This article describes the modern Electromechanical Executive bodies of systems of orientation of space vehicles of domestic and foreign production and gives their main characteristics. The review revealed that Electromechanical Executive bodies, both domestic and foreign production is made roughly the same pattern, namely, on the basis of the reaction wheels on roller bearings and their technical and resource characteristics are comparable. Nowadays in the space industry there are two distinct trends: the trend of increase in weight and size characteristics of the spacecraft caused by the increase of the target hardware, and the trend of growth of the active lifetime of the spacecraft. The increase in weight and size characteristics of the spacecraft (SC) leads to the fact that there is a need to increase the control torque of the Electromechanical Executive body. Managing time can be increased by increasing the mass or dimensions of the Electromechanical Executive body or by increasing the speed of rotation of the motor flywheel, included in its composition. Based on the specifics of space technology, namely because of the restrictions on its weight and size characteristics, the most appropriate way of raising the control point of emio is to increase the rotation speed of the motor flywheel. Active lifetime (SAS) of the spacecraft can be increased by increasing the period of operation of components and assemblies of the spacecraft, and including Electromechanical Executive body and due to redundancy of the most critical nodes SC. Preferred is the improvement of SAS by increasing the active lifetime of the components of SC. The article gives a brief analysis of the possible causes of failure of existing Electromechanical Executive bodies in the operation by increasing the speed of rotation of the motor flywheel and identifies the most likely cause of failure is the destruction of the ball bearing supports Electromechanical Executive body due to the overload acting on it. The questions of reliability and durability of ball-bearing supports, the problem of determining these characteristics for the bearing have been considered. The possible method of modification of a given support has been studied. The major factors limiting the use of ball bearings in Electromechanical Executive bodies have been determined. Classification of existing supports Electromechanical Executive bodies and means of contactless suspension of the bodies used in modern technology has been given. Comparative analysis of gas and magnetic bearings has been conducted. The advantages and disadvantages of gas bearings have been studied. Magnetic props of various types, their comparative analysis, identified the feasibility of their application with satisfactory dimensional characteristics have been considered. The task to create a passive magnetic support on the basis of highly coercive permanent magnets has been set.
Siberian Aerospace Journal. 2016;17(3):760-767
pages 760-767 views

FAULT INJECTION TECHNOLOGY FOR FAULT TOLERANCE TESTING OF MICROPROCESSORS DESIGNED TO ONBOARD EQUIPMENT

Chekmarev S.A., Khanov V.K., Timokhovich A.S.

Abstract

The fault injection process specification and overview of injection methods are presented. The fault injection technology is for fault tolerance testing of computing elements and devices and operating systems used for onboard equipment. The fault injection in microprocessor imitates single event upset of internal and external microprocessor memory. A single event upset consists of a memory cell inverting in value. Injection model is defined by injection planning set included kind of fault, its time and location; by system-under-test operation set during injection; by injection result set: parried fault or not; also by statistical measure set derived from results. The process of fault injection in microprocessor consists of memory cell inverting by any methods during microprocessor operation. Injection results are collected and then processed by external computer to microprocessor under test. Injection methods are physical or realized in system-under-test model which can be invasive or non-invasive. Physical methods are based on using of real process which may cause faults in factual microprocessor system. Non-invasive methods do not use or minimally use the hardware interference in microprocessor system-under-test for injection. Most of the injection methods are common for any electronic mostly digital system, but two methods are specifically developed for microprocessor systems: software fault injection and injection via the testing port using the on-chip-debugger. Injection via testing port injects the fault independent of microprocessor program execution. Most of fault injection methods based on the on-chip-debugger use external hardware-in-the-loop environment what slow down the injection process. The developed method of on-chip injection is targeting on SoC-microprocessors. In this method the injection infrastructure is immediately within testing microprocessor as IP-core what minimizes time delays. Overview shows fault injection technology has the high practical significance and brisk growth.
Siberian Aerospace Journal. 2016;17(3):768-781
pages 768-781 views

GEOSTATIONARY ORBITAL INJECTION OF A SPACECRAFT BY THE COMBINED METHOD

Yakovlev A.V., Vnukov A.A., Balandina T.N., Balandin E.A., Tarletskiy I.S.

Abstract

Relevance of the work is determined by the increased competition in the global market development of satellites, which requires the reduction of costs for the development and spacecraft launching. The obvious way to cut costs is to reduce the launching mass of the spacecraft, that allows us to apply to spacecraft launching into geostationary orbit cheaper launch vehicles of the middle class, or to launch several space vehicles with one launch vehicle. An alternative solution to this problem is the combined method of spacecraft removing. Combined method of spacecraft removing has the advantage of insertion time regarding the method of removing using only the electric propulsion thrusters, regarding the method of removing by chemical two-component propulsion thrusters - the amount of fuel. Consequently, the combined method of removing will allow the spacecraft to move quickly through the area of the inner radiation belt of the Earth using the two-component chemical thrusters and electric propulsion thrusters for further removing spacecraft on operational orbit. The aim of research is to assess the effectiveness of removing the spacecraft on geostationary orbit by the combined method, the optimization of the mass of fuel for removing. As the results of the performed work the following things can be considered: optimization criteria of the combined method, the method of optimization of the fuel mass and the corresponding set of programs in MatLab. Also, the following calculations and analysis of the results were carried out: launch spacecraft of various launching mass by combined method, using launch vehicle “Proton-M” with the upper stage “Breeze-M”, the Baikonur сosmodrome, Kazakhstan, and with the help of the launch vehicle “Falcon-9v1.1” cape Canaveral, the USA. In conclusion, according to the article launching with the help of launch vehicle “Proton-M” with the upper stage “Breeze” has a number of advantages than foreign launch vehicle.
Siberian Aerospace Journal. 2016;17(3):782-789
pages 782-789 views

Investigation of The characteristics of Fe3Si epitaxial FILMS grown on Si(111) substrates

Volochaev M.N., Loginov Y.Y.

Abstract

The results of structural studies of epitaxial films of the ferromagnetic silicide Fe3Si, grown by molecular beam epitaxy on an atomically clean surface of Si (111)7×7 at a substrate temperature of 150 °C are presented. The active study of epitaxial metal films on silicon is due to the need to increase performance, reduce size and energy efficiency of microelectronics devices used, including, in the automatic spacecraft. The study of the ferromagnetic silicide films associated with the production of nanomaterials for photonics, microsystems technology and memory devices are closely linked with the development of a new direction of spin electronics. This is due to the fact that iron silicide combines ferromagnetic and semiconductor properties. Also Fe3Si silicide has a face-centered cubic structure and a small mismatch lattice parameter with silicon (4.2 %) and germanium (0.5 %) substrates that allows grow Fe3Si single-crystal film in the direction <111>. Using electron diffraction method the structure of the films has been studied and it is identified as a single crystal film of Fe3Si(111), as well as the thickness and roughness of the film and the angle of rotation of the crystal lattice between the Fe3Si film and Si substrate were determined. The obtained data are needed to develop the recommendations to improve the technology of growing of epitaxial ferromagnetic silicide films.
Siberian Aerospace Journal. 2016;17(3):792-796
pages 792-796 views

SORPTION AND DIFFUSION OF SCANDIUM AND TITANIUM ATOMS ON CARBON NANOTUBES SURFACE

Kuzubov A.A., Tikhonova L.V., Lubkova T.A., Krasnov P.O.

Abstract

The study focuses on carbon nanotubes (CNT) surface modification with transition metal atoms. CNT modification expands their scope and makes them more perspective in the production of micro- and nanoelectronic devices, which, in turn, can find application in electronic control units of space technology. We have considered the possibility of scandium and titanium atoms coating on the CNT surface. Selection of atoms is due to the potential possibility of creating uniform coating by these atoms that is impotent for practice application. The adsorbing capacity and the mobility of atoms play an important role during coating formation. Until now it has not revealed whether the non-uniformity obtained in the experiment is fundamental property or it depends on coating process technology. Understanding the basics of coating formation will help control this process. It is possible that the uniform coating can be formed only on tubes with certain chirality or diameter. In this research we propose and study the influence of radius, chirality and conductive properties of nanotubes on its interaction with scandium and titanium atoms. The theoretical study of single scandium and titanium atoms interaction with a set of carbon nanotubes ”zigzag” and “armchair” types has represented. The radius dependence of binding energies (Есв) and activation energies (Еа) for surface diffusion transition metal atoms in two nonequivalent directions are built. The influence of radius, chirality and conductive properties of nanotubes on Есв and Еа values are evaluated. The results show more strong interaction between the surface of the carbon skeleton and titanium atoms as compared with scandium atoms. The curvature of the carbon skeleton also facilitates more strong interaction between studied atoms and the surface of the nanotubes. It has revealed that the degree of influence on binding energy and diffusion barrier values decreases in the set: chirality - conductive properties - radius. In general, values of activation energies are low, that reports on possibility of atoms moving. Such possibility will facilitate the formation of the uniform coating. The data presented have been obtained density functional theory approach and the Vienna Ab initio simulation package (VASP). Nudged elastic band method has been used for finding transition states and potential transition barriers of metal atoms moving on CNT surfaces.
Siberian Aerospace Journal. 2016;17(3):797-803
pages 797-803 views

INVESTIGATION OF MAO COATING FORMED ON THE ALUMINUM ALLOY OF AL-MG-SC

Trushkina T.V., Miheev A.E., Ravodina D.V., Girne A.V.

Abstract

In the production of modern rocket and space technology, 01570 aluminum alloy system Al-Mg-Sc is applied. Alloy 01570 has high strength characteristics (370-390 MPa), with all the positive properties of this alloy, its corrosion resistance is not high when operating conditions in corrosive environments that affect the physical and mechanical characteristics of the surface. There is a possibility to solve this problem, increasing the operational properties of the alloy, such as surface treatment, micro-arc oxidation (MAO). MDO technology of obtaining the oxide coating with a unique combination of properties that allows using the product in extreme conditions. Experimental studies on the formation of microarc oxidation coatings were conducted on samples of aluminum alloy 01570. As a result, it was found that the thickness of the oxide layer produced on the alloy 01570, less than the alloy AMg6, obtained under identical processing conditions. The analysis of the morphology of the coating, which is characterized by its porosity and has an influence on the corrosion resistance and strength characteristics of the treated surface, which is fundamental in the operation of rockets. Specifically, when the magnification ratio of the cathodic and anodic components of the current Ik/Ia) surface changes its structure, the number of pores is reduced, is rendered more uniform, smooth surface. According to the results of electron microscopy established that in dense areas of defect-free aluminium oxide content increases, in areas with complex relief structure is dominated by aluminosilicates and surface complexes formed from the composition of the electrolyte. In the coating formed on the alloy 01570, the aluminium oxide content of up to 80 %.
Siberian Aerospace Journal. 2016;17(3):804-809
pages 804-809 views

EVALUATING OF INDUSTRY ATTRACTIVENESS IN STRATEGIC PLANNING OF WORLD MARKET ACTIVITY OF RUSSIAN SPACE INDUSTRY COMPANIES

Bogomolov V.A., Danilchenko Y.V.

Abstract

The aim of the article is to identify the factors that determine the attractiveness of an industry with a view to their further use in conducting strategic analysis. The information about the share of Russian companies in the total world production of rocket and space technology is given. A comparison of the level of competition on the Russian and world markets of aerospace industry in 2012-2014 is given. The characteristic of dynamics and trends of the world market of space activities is submitted. The structure of the world market of space activities, including the share of the private and public sectors, and trends in their changes is presented. The necessity of output of Russian enterprises of aerospace industry in the global market is justified. The article proposes an ordered list of the factors that determine the attractiveness of industries and markets products of rocket and space industry, which must be taken into account in strategic planning activities in the global market. The list of information sources and baseline data for the analysis of industries and markets is given. The comparative characteristic of the analytical and research reports on the state of and outlook for production of rocket and space industry, as well as on the possible direction of the market the first 20-30 years of the XXI century are submitted. The method for using the results of the analysis of the attractiveness of the sector for strategic planning of enterprises of rocket-space industry of Russia in the world market is presented.
Siberian Aerospace Journal. 2016;17(3):812-816
pages 812-816 views

IMPROVING QUALITY OF TRAINING PERSONNEL FOR HIGH TECHNOLOGY INDUSTRIES BASED ON INNOVATIVE APPLICATION OF COMPETENCE APPROACH

Grinberg G.M., Fedorov V.A., Savelyeva M.V., Barhatova D.A.

Abstract

Currently the most significant state mission is an innovative development of Russian aerospace industry as the foundation for a new economic paradigm based on high technologies. Realising the mission is possible if highly-qualified personnel are available, and they are ready for innovative transformations in the industry, that requires to apply new or significantly advanced methodologies in training university graduates to be the major part of the personnel at the enterprises of aerospace industry. Researchers in the field of theory and methodology of professional education propose different solutions for personnel training and employment issue, one of them is connected with the paradigm of competence approach. The authors’ analysis of domestic and foreign publications demonstrates that there is not enough focused research in the field of competence approach potential application to organise proficient students’ training. This results in the necessity to develop new teaching technologies meeting modern requirements to the level of graduates’ competence. The goal of the research is to identify organizational educational conditions of applying competence approach technologies to improve the quality of training graduates whose majors are “Innovation technologies” and “Control systems of flying vehicles”, while they are doing academic assignments in cooperation. To specify the rational conditions and spheres of cooperation we have analysed the requirements of Federal state educational standards of high education for bachelor training whose major is 222000 “Innovation technologies” and specialists in major of 161101 “Control systems of flying vehicles”. We have compared the main characteristics in professional activity according to the graduates’ training programmes: the spheres, objects, and types of professional activity, job assignments as well as the requirements to the graduates demonstrated by the set of common cultural and professional competences. We have indicated their similarities and differences. According to the obtained results of the comparative analysis and the competence approach we consider the possibility to train students of “Innovation technologies” together with technical students applying interdisciplinary, inter-field specific education interaction. We prove the necessity to develop the interaction to increase the quality of teaching common cultural and professional competences to the students. We show the results of practical using the proposed approach on the example of training students with majors at the departments “Organisation and Management of High-Technology Enterprises” and “Systems of Automatic Control” .
Siberian Aerospace Journal. 2016;17(3):817-823
pages 817-823 views

THE ANALYSIS OF GROWTH FACTORS IN THE BRANCHES OF DEFENCE INDUSTRY

Korsukova N.D.

Abstract

N the article the author analyzes the factors of growth in defence industry. The analysis is based on the general regularities of the reproduction of capital. The approaches to the reasons of the role of different factors in increase of labor productivity on the example of classical, marginal, neoclassical theories are considered. The author gives the characteristic of the modern situation in economy and in defence industry. Due to the imposition of sanctions against Russia from the developed countries, the implementation of the program of development of defensive branches meets certain difficulties. Therefore the necessity of search, first of all, of internal sources of financing of conversions in the defensive industry is justified. Based on the theory of reproduction, reserves of growth are associated with accumulation fund and some part of compensation fund. Therefore the formation of necessary investment resources and their effective use assumes a new quality of financial system in the country and a new model of relations between real and nominal sectors of economy. The state is obliged to be guided not on the demand economy, but on the supply-side economy. Therefore it must create a distinct industrial policy where the policy of import substitution will become a component. In innovative economy a major factor of growth is knowledge. Reproduction of knowledge is subject to transformation of a human factor into the human capital which moves apart from boundaries of production and influences productivity and efficiency of work. The financial sector of economy has to provide adequate conditions of transformation of knowledge into a decisive factor of economic development and change the functional purpose.
Siberian Aerospace Journal. 2016;17(3):824-829
pages 824-829 views

SIMULATION OF THE COST OF RESIDENTIAL PROPERTY IN KRASNOYARSK FOR 2013-2014

Savchenko L.M., Savostyanova I.L., Senashov S.I., Yuzaeva A.G.

Abstract

Data on the cost of secondary residential real estate in the city of Krasnoyarsk for the years 2013 and 2014 was collected and analysed. The number of objects in 2013-4031 items, in 2014-1037 items. Each flat is characterised by 13 parameters: number of rooms, layout, residential district, floor, total number of floors in the building, material of the walls, telephone, total useful floor area, living space, kitchen area, WC-and-bathroom unit, kitchen stove, availability of a balcony or stanza. On the basis of ordinary least squares (OLS) an adequate linear model of the cost of a flat for the years 2013 and 2014 was created. Their own significant factors were found for the models of each year. Also separate models for flats in Oktyabrsk and Sverdlovsk districts of the city of Krasnoyarsk for the year 2014 were created. It was examined how the influence of general factors on price formation changed. The number of rooms factor started to have a smaller effect on the price of residential real estate. The negative coefficient on this parameter increased by 1.5 times. Layout also started to have a smaller effect on the price. The negative coefficient increased by 2 times. Residential district: the negative coefficient on this parameter has become smaller which indicates that the location of the flat in the city has started to have a larger effect on the price. Total useful floor area: the effect of this factor did not change. Living space: a change in this factor’s coefficient turned out to be the most prominent because it increased by almost 5 times. From the analysis of models of the price of flats in Oktyabrks district one of important factors is availability of a balcony or stanza. For flats in Sverdlovsk district important factors are material of the walls of the building and availability of a telephone. These facts can be explained by the specific characteristics of these districts. When analysing residuals of the obtained linear models heteroscedasticity of the residuals can be seen; it was shown by Goldfeld-Kvant, White and Glazer tests. With the help of generalised least squares (GLS) on the basis of the linear model new models with homoscedastic residuals were created. The created models adequately describe experimental data.
Siberian Aerospace Journal. 2016;17(3):830-835
pages 830-835 views

RELATIONSHIP between TYPES OF INNOVATION AND Elements OF HUMAN CAPITAL of employeEs in the enterprises of military-industrial complex

Sandanova B.D.

Abstract

Innovative activity is highly relevant means of adaptation of the military-industrial complex in accordance with the requirements of the time. Innovative activity of enterprises of the military-industrial complex in modern conditions is the most expensive to build the most advanced models of equipment on the existing level of knowledge, but it has far-reaching prospects both in equipment and in product sales. Organization of high-tech, competitive production is possible only on condition of military-industrial complex skilled workers that have high intellectual and creative potential. This increases the demands on management mechanisms related to the formation and development of human capital. The article is devoted to research and identify the characteristics of the human capital in the development and implementation of innovations at the enterprises of the military-industrial complex. In order to describe the characteristics of the human capital adopted a typology of innovations on the scale caused by the effects. The results of the study showed that depending on the implementation of strategic and ongoing innovation are changing the characteristics of the human capital of the structural elements: physiological capital, professional and personal capital, intellectual capital. The difference between the workers involved in the development and implementation of strategic innovation is the focus on the formation and development of human capital, while the workers involved in the implementation of current innovations focused on maximum utilization and human capital formation. The results obtained allowed to determine the main directions of formation and development of human capital for innovative development of enterprises of the military-industrial complex.
Siberian Aerospace Journal. 2016;17(3):836-839
pages 836-839 views

MATRIX OF STRATEGIC SOLUTIONS AS A TOOL TO CONTROL THE LEVEL OF SCIENTIFIC AND TECHNOLOGICAL DEVELOPMENT OF ENTERPRISES OF THE DEFENCE INDUSTRY

Silkina A.V., Erygina L.V.

Abstract

This article describes the development of a strategic matrix that is used for making strategic decisions at the enterprises of the military-industrial complex. Presented matrix allows you to control the level of scientific and technological development in the enterprise. The matrix involves plotting and carrying out cross-evaluation of scientific and technological levels of development of the enterprise. Matrix, which is based on the evaluation, will allow you to elect the intended strategy and improve the level of scientific and technological development of the enterprise and to strengthen the current situation. Matrix of strategic solutions is a modified BCG matrix. This matrix consists of four squares. In each square there is the proposed strategy of the enterprise. The choice of a particular strategy (hit in any quadrant) is determined by the current level of scientific and technological development of the enterprise, marked on the axes Y and X. Levels of scientific and technological development are evaluated with the help of integral indicators of scientific and technological development. These indicators are designed specifically for the enterprises of the military-industrial complex. The article presents the formulas for the calculation of these ratios. The tactics of their calculation are given. Variables that are included with integral indicators and present the values of the reference indicators are described. In order to understand in which quadrant the enterprise will get it is necessary to calculate levels of scientific and technological development using provided formulas, and then draw directly to the matrix. The level is “high” if its value is greater than one and “low” if its value does not exceed one. Based on such combinations of high and low development of scientific and technological development we have got 4 quadrants: high scientific development in combination with low technological development; high scientific development in combination with high technological development; the low scientific development in combination with low technological development; the low scientific development in combination with high technological development. Each of the combinations is described in the article. Based on the situation of the company the policy options are proposed.
Siberian Aerospace Journal. 2016;17(3):840-845
pages 840-845 views

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