Vol 14, No 2 (2013)

The work is devoted to solution of the problem of predictive modeling of relative capacity of wind power plants in relation to season and weather factors. It contains step-by-step description of the following steps of modeling: factor selection, raw data pretreatment, model evaluation and optimization. Both heuristic and formal methods were combined to construct the model. The basic modeling approach here is the k-nearest neighbors method. The model has been verified with the use of test sample. The developed model allows to optimize the wind power plant operation in relation to weather factors and network load.

At the present time simulation modeling is the popular tool for solution of problems of inspection of functionality and trial of the main modes of satellite control. The main task of this article is study of operation of motion control system of satellite under the influence of perturbing factors of space environment and control forces with the help of simulation modeling. In this regard the works on the development of simulation models of satellite control systems was carried out by home specialists in the Republic of Kazakhstan, which will allow to create the local scientific and technical basis for the development of motion control systems and navigation systems with the account of the latest achievements of science and technology.

The purpose of the work is to study the possibility of the synthesis of systems of automatic control described with time optimal systems of differential equations of the third and the fourth order. The authors analyze the existing investigations for creation of time optimal systems of high order and present a simple synthesis strategy based on the method of the phase trajectories. The proposed strategy includes all the stages of creation of the time optimal system, from the input description in the form of a differential equation or a transfer function to formation of a correcting section. The creation of time optimal system of higher-order is challenging to obtaining the information about the n – 1 derivatives, where n is the order of the system of differential equations. However, to obtain such information technically is practically impossible. The article proposes a way to create a device for obtaining the necessary information with the synthesis of time optimal systems of high order.

It is shown that the use of a modular principle at the stage of technical design of multiversioning software package is connected to the process of optimization of structure and interactions of the individual components. The authors offer an original definition of the problem of synthesis of multiversioning modular structure of software system that ensures the minimization of inter-module interface. The presented definition of the problem allows to generate a set of components multiversioning modules that are used in the programs of the complexes as arbitrary, and in the pre-set sequence. In this case the set of multiverses meets the specified conditions, ensuring maximum reliability and minimum PC specifications of inter-module interface.

The work is devoted to the problem of existence of global analytical solutions of the generalized Cauchy problem with initial-boundary conditions of Riquier type, specified on the coordinate hyperplanes. Used as the classic methods of complex analysis, and relatively new methods of the theory of amoebas algebraic hyperplanes. The authors prove the solvability of value problem in the class of functions of exponential type boundary for polynomial differential operator with constant coefficients and reveal the linear connection of the characteristics of the growth of solutions of boundary-value problem from the growth of the boundary conditions and right-hand side of the equation. Research methods can be useful for further research of the theory of differential operators.

The paper deals with a research of output prediction algorithm for a system of nonlinear stochastic static objects that can not be decomposed, in partial parametric and nonparametric uncertainty. The authors set the goal to perform modeling in conditions brought nearer to real technological industrial process conditions, due to the prior information obtained. In the approach the theoretical aspects of parametric and nonparametric identification of stochastic objects are used; term of compound vectors that allows to take account of intrastation complexity is introduced; problems of distinct discrecity of variables measurement and account of different levels of the prior information are considered. The authors present a new type of models which is based on the following triad: basic laws, parameterized and nonparameterized relations. The work contains new algorithms, models and computational investigations. The results can be applied when modeling of technological processes ofproduction and processing, as well as in description of objects characterized with multi-linked relations and complexity resulting from the lack of information.

The finite element of a shell with low value of transverse shear stiffness is considered. As the basic kinematic variables transverse shear strains are in eveidence. The results of numerical analysis showing urgency of the model are presented.

The new scheme for generation of a given number of uniformly distributed points in the hypercube is offered and the main properties of the generator are investigated. In the generator the additional condition is represented: the simply ordered values of each coordinate of all generated points are equidistant from each other. This makes it different from the usual simple generator in which each coordinate of point (vector) is determined by a pseudo random number evenly. The points deduced are more uniformly distributed in space and more full information about the research function is retrieved. Generator was applied in the algorithms of search of global optimization of functions of many continuous variables and in the case of statistical study of these algorithms.

The authors present the modeling of the cost of one-bedroom apartments in Krasnoyarsk and show that these models adequately describe the cost of housing. They solve the actual problem which allows to calculate the tax on housing on the basis of adequate models. The models are constructed for several periods: 1998, 1999, 2010, 2012 and 2013. The dynamics of changes in house prices is investigated. The change in the effect of various factors influence on the value of the property is traced. The indicators that show the state of the residential real estate market are introduced. One of such indicators is the normality of distribution of the real estate prices. It is shown how the indicator changed in crisis, after crisis and stable years.

It is necessary to consider a set of structurally interconnected and functionally cooperating polytypic systems for estimation of functioning efficiency of the boring rig. In these conditions the difficult system is formed at interaction of all systems of the boring rig intended for boring, and rock. If to consider the boring ring, the greatest influence on the process has the feed force and rotation frequency of movable operating element, as well as the structure and properties of materials of the drilling tool. If to consider the rock massif, the most important are strength characteristics which can be registered through the boreability indicator, as well as the structure of the rock massif. The definition technique of a roller bit firmness and speed of boring depending on strength properties and structure of the rock massif is developed. The presented technique allows to analyse a ratio of productivity of the boring rig of roller-bit drilling and a resource of a drill bit when boring the rock, being characterized with various indicators of boreability, quantity and the size of crevices and beds of the rock with various physical and mechanical properties .

The description of models and methods of support of decision-making is presented in article at the choice of points of communication and navigation spacecrafts control, in particular the analytical and simulation procedure of formation of the basic set of points of spacecrafts control, including imitating model of sifting of structure variants according to algorithmically set restrictions on attributes.

In this article the author proves the theorems about the generalized solvability of mixed value problem for nonlinear partial differential equations with pseudoparabolic operator of arbitrary natural power.

A new method of direct differential correction of position measurement errors which will be relieved of a large amount of corrective differential amendments transmitted to many users of the system with the necessity to choose the most accurate of them in consumers equipment.

On the basis of the model of radial gas flow-around the hemispherical surface the authors substantiate the ability to create enough lifting fore for the aircraft of an unconventional shape. During the analysis of possible design solutions the authors detected the optimal geometry of the wing and the propulsion system and peformed experimental researches on estimation of the lifting force.

The actual issues of the analysis of the dynamic performance of pointing and attitude control subsystem including elasticity of spacecraft construction units are considered. Investigations of the resonant elastic vibrations of elastic spacecraft construction units, such as solar array panels and communication payload antennas excited by perturbing moments of power gyroscopic unit on the basis of ГД 02-150 gyrodyne when required control moment is being formed, are conducted. The analysis of zero-input response of elastic spacecraft with continuous gyro gimbal speed setting, zero-input response dynamic performance of elastic spacecraft when the gyrodyne moments are applied and elastic vibrations errors caused by power gyroscopic unit operation in the subsystem control loop are, are carried out. The assessment of the attitude dynamic error between the connected and the given coordinate systems, and antenna angular deviations from its nominal position caused by the elastic vibrations, is given. Recommendations how to eliminate resonance elastic vibrations of elastic spacecraft construction units are developed basing on the results of the performed investigations.

Cyanate ester resin (CER) is the novel and prospective material. Thermal stability, low gas and moisture absorption, high dielectric properties, low outgassing, good resistance to radiation and radio transparency with dimensional stability are the key CER properties that make it the best candidate for the use in space apparatus manufacturing. During the impregnation process of high modulus carbon fibers by cyanate ester prepolymer at Prepreg Line-Type PLS-250-2F (Mikrosam, Makedonia) a premature reaction of polymerization on the heated metal rollers in the resin transfer sector of machine was observed. In this regard the catalytic effects of organometallic complexes containing ions of transition metals on kinetics of CER polymerization by using DMA and viscosimetric methods were studied. It is shown that a usage of stainless steel rollers results in a significant reduction of a lifetime of melt prepolymer. By the results of this research it is recommended to use the ceramic rollers instead, for example made from boron nitride. As a new type of catalyst for curing reaction of cyanate ester prepolymer, with the possibility of incorporation into the polymer network, diazonium compounds were first investigated. The obtained results include a new class of catalysts for curing of cyanate ester prepolymer into the category of a prospective type.

Tangential entry of binary plasma-formed inert gas mixture into plasmotron positively influences on the welding process for a number of parameters, but the vortex state of the plasma arc event causes air inflow, resulting in oxida- tion of the metal and its fragility. To avoid embrittlement of the metal welded by plasma welding of chromium bronze molds BrH08, the content of chromium in the range 0,8…1,2 % is required. This is provided by the use of the additive powder wire with 22 % Cr and 2 % Ti.

One of the approaches to selection of design parameters and of non-ferrous metals induction heaters power supply parameters for a multicriteria optimization choice of a trajectory is considered while designing. Multiple search calculations of optimum characteristics of thermal and electromagnetic fields in the environment of Ansys Multiphysics taking into account a power supply system are carried out. The algorithm of the solution of the interconnected electrothermal task taking into account a temperature condition of heated preparation is realized. The concept of the induction heater modes space is entered and regularities of influence of its design data on efficiency of heating and an operating mode of the power supply are defined.

This paper presents an approach to the construction of algorithmic support of complex technological systems on the example of the melting furnaces of Vanukov. The author offers a method for controlling the quality of final products through the combined use of neural network models of the process and modification of the dynamic programming algorithm of Bellman.

This work is dedicated to the creation of the manipulator control system. In the manipulator we used servo drive group. The automatic control system consists of a personal computer and the controller of servo. We describe the principles of operation and control of servo drive group. We used proportional-integral-differential controller to control motors. We describe a method that allows to debug and test the control system, with the use of virtual simulation. We created a controller after debugging the control system on the virtual model. We implemented control of servo drive group. We used the created control program of microcontroller. The proposed method allows to test the control system before the production of electronic devices. You can use this method of virtual simulation of control systems in the development of various control systems. Method can be used to control systems in which the commands are given from computer via a USB-port.

The authors consider the chemical processes occurring during microarc oxidation (MAO) of the aluminum alloy AMG-6 silicate-alkaline electrolyte, the possible chemical changes as a result of interaction of the components included in the electrolyte, the results of studies to determine the elemental composition of the coatings, the dependence of the content of such oxide elemental forms of SiO 2 and Al 2O 3 as the chemical composition of the coating process conditions. The studies indicate that the coating of the aluminum alloy samples consists of two basic elements if the oxide forms, such as SiO 2 and Al2O 3. The study of the phase composition of the coating made with X-ray analysis revealed that the coating formed by oxidizing microarc alloy AlMg-6 consists of a and γ-Al 2O 3, with Al 2O 3, and the a phase is present only in the inner layers of the coating, γ-Al 2O 3 is present throughout all the thickness of the coating, and on the outer edge of the coating the mullite phase (3Al 2O 3 • 2SiO 2) and silica SiO 2 was revealed.

The authors describe the features of shaky electrochemical honing process during removal of a defective layer from a mirror surface of a beam guide made of 32 alloy by NKD method of milling. The small inequalities of a surface can be formed all over the processed surface at the expense of anode dissolution of micro inequalities by electric field and mechanical activation of combs of micro inequalities by abrasive elements at vibration of the cathode of the tool.

The main purpose of the research was the development of the technique for guarantee of the required accuracy of the components consumption through channels of aircraft details with a plenty of «hard-to-get» channels. The design engineering features of aircraft details are analyzed. The features of the abrasive flow machining process are considered. The technique for the required quality guarantee of the geometrically complex channels of aircraft details with the use of abrasive flow machining process is described. The approbation of this technique is performed with the use of the experimental plant. The recommendations for the choice of equipment, work medium composition and work parameters are offered. Use of the offered technique allows to carry out the finish machining operation of a channels of aircraft details with the given quality guarantee (accuracy of the components consumption through channels and pimples in a range Rа = 1,6... 3,2 microns) with the existing equipment.

The problem of the regional logistics infrastructure formation (RLI) is observed. The goal of this work was to study the role of stakeholders in the project of RLI formation. The authors identify the key stakeholders, discuss their role in the project. The assessment tools for their interests, the impact and importance of stakeholders are pointed out. It is shown how to define their roles in particular project and take measures for their involvement. The experience of public-private partnership in Germany is considered. The results obtained demonstrate the possibility of public-private partnership in Krasnoyarsk region. The described method of stakeholders evaluation can be used to select them, determine their role in the formation of RLI and develop the measures for their involvement in the project which allows to set up the infrastructure quickly, taking into account the interests of all stakeholders.

The role of innovative potential in formation of the portfolio strategy is determined in this article. The analysis of the concept of “innovative potential” is made; the structure of innovative potential is suggested; the assessment indicators of the achieved potential and the potential critical potential are presented. The methodology of formation of the portfolio strategy of innovative development of the enterprise is developed.

The article substantiates the need for the establishment of the disbursing service of the industrial enterprises. We consider an approach to the development of accounting and analytical information in the disbursing service. Special attention is paid to the scheme of transformation of the information that allows to judge about the possible spectra of the new information received at the expense of its detailing, comparison and analysis of the cash flow management.