Vol 25, No 2 (2017)

Articles
Analysis of earth remote sensing data for oil spill detection
Belikov V.A., Galyanin V.V., Orlov S.P.
Abstract
The paper deals with the problem of oil spills detection caused by man's production activity. The use of a chemometrics web-service for build PCA, PLS-DA models for identify oil components on the surface is proposed. Examples of application of the models for petroleum products detection on the earth's surface in the Samara region are considered. It is shown that the separation of oil products, water resources, city buildings, vegetation and other soil formations obtained is highly accurate. With the help of cross-validation, a quantitative estimate of the guilt of the models used was made.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):7-12
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The analysis of functional suitability of hardware-software complexes based on apparatus of statistical indexes
Gvozdev V.E., Blinova D.V., Davlieva A.S.
Abstract
The problems of functional safety of hardware-software complexes are discussed, causes of inadvertent defects are revealed, the standard structure of defects management process is given. “Functional profile” of hardware-software complexes taking into account existence as "useful" and "harmful" functions from the viewpoints of various stakeholders groups is offered. The model allowing to estimate functional efficiency of hardware-software complexes and representing a kind of a statistical index is described.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):13-23
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Structural approach to construction methodology research systems
Ilyasov B.G., Gerasimova I.B., Karamzina A.G., Saitova G.A.
Abstract
In the paper the authors' view on the content of the methodology of research of systems of various physical nature is presented. The classification of methodology is based on the structure of its construction. This structure reflects the specifics of the problem being solved. The following structures are distinguished: hierarchical, network, multiply connected, matrix. Examples of constructing methodologies based on these structures are considered. In the hierarchical structure, all methods, structures, concepts, systems of views are located according to their subordination in terms of cognition. The network model is represented as a connection of triads with common feedback, each of which reflects the corresponding stage of the life cycle. It is shown that the control of the organizational system can be effectively organized on the basis of a multiply connected structure. When allocating resources a spatial matrix structure can be used as the basis of the methodology for solving the problem. For each type of activity, including scientific activity, its methodology can be built as a system of intellectual technology of scientific knowledge, as a system of views, concepts and as a system of actions for goals achieving.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):24-33
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Analysis of the technological process of manual and mechanized argon-arc welding as object of automatic stabilization and control
Myuller V.V.
Abstract
This paper is devoted to the investigation of the manual process of argon-arc welding by a non-consumable electrode as an object of automatic stabilization and control. In the course of the work, a multicriteria process was revealed. A system for assessing the quality of the welding process was proposed. A classification of the disturbances was given. A functional diagram and the burner mechanism for implementing the automatic process stabilization system was proposed.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):34-44
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Building hybrid intelligent systems based on the integration of technology for solving problems of quality control processing of high-precision parts
Samoilova E.M.
Abstract
The concept of integration of intelligent technologies of expert systems and neural network architectures in the management of product quality at all stages of the life cycle, contributing to the improvement of product quality and production efficiency in General. Discusses the construction of the hybrid intelligent system based on the structure of dynamic expert systems with neural network technology for decision-making on the state of the technical system the results of the analysis of information on the surface quality of the bearing components for different combinations of workpiece and tool. The algorithms of information-measuring channel eddy current inspection for identification of the surface layer and the sequence of diagnosis of the main subsystems of the machine on the basis of the detected surface defects of rolling bearings as the quality criteria of the technological system.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):45-51
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Aggregation of investment management systems
Sarkisov V.G.
Abstract
A generalized approach to the formation of an investment management system based on combining of several existing systems is proposed. The main ways of combining are: portfolio of systems and logical operations. The main organizational forms of individual and collective investments are presented. Their classification according to the characteristics of ways of subsystems' aggregation is carried out. A method for selecting the way of aggregation is proposed. It's based on the analysis of the coalition game generated by the logical operations' aggregation. Aggregation and subsequent optimization are followed by overfitting. Some methods of overfitting restriction are considered.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):52-57
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Correction of the dynamic error of inertial sensors
Lange P.K.
Abstract
The method of dynamic error correction for inertia sensor having a transfer function type aperiodic operator of the first order is considered. The method is based on the realization of the inverse sensors operator in a dynamic mode. Correction method uses a parabolic spline - approximation of discrete values of sensors signal, as well as its first derivative. An example of correction of the signal formed by the inertia sensor of a particular type is described. It is shown that the use of a mathematical correction method based on digital filter in-line processing of discrete signal values allows to reduce the dynamic error of inertia sensor in several times. It is proposed to use the method described above also for the correction of the sensors signal, the operator function of which has the second order. The considered method can be easily implemented using modern microprocessor measuring systems.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):58-64
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The sign method of detection and estimation of informative units of multicomponent signals in the presence of external additive noise
Yakimov V.N., Mashkov А.V., Gorbachev O.V.
Abstract
In the paper problem of detecting and distinguishing the informative units of multicomponent signals in the presence of external additive noise is discussed. The solution of this problem is based on harmonic analysis Fourier series using the sign-function analog-stochastic quantization of the investigated signal.The developed harmonic analysis algorithms practically eliminate the need of performing multiplication operations, which ensures their high computational efficiency. For the decision of detecting harmonic components, the criterion for exceeding the threshold value by estimating the amplitudes of the harmonic components is used.The results of experimental studies show that the developed algorithms allow to eliminate effectively the influence of additive external noise and to obtain a high quality of detecting and distinguishing the components of multicomponent useful signals.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):65-72
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Mathematical modeling of network modes at the nonsymmetry of their parameters and loads
Burjanina N.S., Koroljuk J.F., Lesnykh E.V., Suslov K.V., Gogolev R.O.
Abstract
To analyze the steady state of an asymmetric network with passive parameters, the presence of commutations, and loads differing in phases, a mathematical modeling technique, an algorithm, and a software package are proposed. The latter is built on a modular basis using the Mathcad system. The set of its modules is formed according to the real composition of typical network elements. The description of each of them in the form of a separate procedure is a specific fragment of the general mathematical model of the network. Together they represent a system of program blocks that allows the user to compose a computational complex with a wide range of analysis directions for asymmetric modes, such as short circuits and phase discontinuities, arising locally or in various combinations. The method of nodal stresses is used as the physical and mathematical basis. The results of the program are presented in the form of documents oriented to the needs of the user, in which the parameters of the network elements and their modes in the phase and symmetrical components are reflected.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):73-83
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Recording and proccessing data of electrical submersible motors technical state
Goldstein V.G., Revyakina E.V.
Abstract
Basis information of improvement of the operation effectiveness the electrical submersible motor (ESM) of oil production are operational (on-line monitoring and sporadic control) and retrospective (forecasting according to emergency incidents) estimates their technical condition. Merits and demerits of the called approaches and expediency of their association within the main maintenance strategy and repairs of ESM are stated by the operating time and actual state. Informatization for the ESM vital cycle description as most essential element of electrosubmersible installations (ESU) is discussed. For the definition of probability distributions and system of operational factors documents about accident rate of ESM in JSC "Samaraneftegaz" are used. They allow predicting boundary conditions of standard sets and concrete ESM at the set operating time from initial commissioning or capital repairs.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):84-91
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Approximate methods to determine calculated maxima of square inertia smoothing of stochastic electric-power processes
Kourennyi E.G., Bulgakov A.A.
Abstract
The nonlinear problem of the square inertia smoothing of mode and EMC parameters of power-supply systems is considered. The initial process is regarded as a stochastic ergodic normal process. Applicability of approximate distribution laws is estimated by comparing them with statistically accurate simulating solution on the basis of admissible error of calculated inertia maxima (quantiles). Distribution normalization borders have been determined. Ambiguity zones and applicability domains of truncated Gram-Charlier and Edgeworth series have been defined. For practice purposes it is recommended to use quantiles of gamma distribution and the proposed «differences method».
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):92-99
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Influence analysis of discrete position-control drive on corrective unit synthesis
Lysov V.E., Kolesnikov I.P.
Abstract
At present, digital automatic control systems have become the most widely used electric drives of the main movement and supply.A special place is occupied by position-tracking systems for feed drives.The latter provide technological processes of processing details for shapes with complex geometry. Insertion of digital systems will lead to the additional error. Therefore, it is necessary to correct the system depending on the frequency of extrapolator in the automatic control system in the position loop. The correction technique a digital system providing a one-sided approach to a given coordinate is considered in the paper, which is especially important, for example, for precision machine feeders to avoid the influence of harmful nonlinearity and a luft, in particular.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):100-107
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Analytical calculation of equivalent circuit parameters for three phase asynchronous motors of АИР-series
Osipov V.S.
Abstract
The consumers of asynchronous motors are usually unaware of their equivalent circuit parameters, which complicates the process of designing and setting up of electrical motors. An asynchronous motor equivalent circuit contains six unknown resistance parameters, with only ratings being defined. In the known publications parameters the determination is carried out either by error method of varying parameters ratio, with parameters ranging widely, or by setting some parameters equal to zero and simplifying expressions. This paper, giving extreme values of the ratio of nominal voltage to the EMF of the magnetization in perfect idling mode, which can vary within 1.02-1.06, determines the parameters of compliance to these coefficients and thus limits the variation range parameters. The values are calculated using equations of the second order based on the constant electric motor power, balance of active and reactive powers. The determination of matching parameters narrow range allows to use the method of proportional parts and make possible preliminary calculations, followed by precise calculations with the following evaluations of solutions convergence.Consequently, the analytical method of equivalent circuit parameters determination for asynchronous electrical motors is developed.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):108-120
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Static stability investigation of virtual power plants electrotechnical complexes
Sosnina E.N., Shalukho A.V., Lipuzhin I.A., Kechkin A.Y.
Abstract
The paper deals with the stability research of electrotechnical complexes (ETC) of virtual power plants (VPP) with small-scale distributed energy sources. The authors give a complex approach to solve the problem of providing ETC VPP stability according to the operation modes. The stability estimation methodology for ETC of the isolated VPP node with distributed energy source and electricity consumer is developed. A block diagram of static stability assessment algorithm for ETK of VPP isolated node is given. Static stability criteria for autonomous power supply system of electricity consumer with wind-diesel hybrid power station are considered.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):121-129
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The power effective approach to a choice of the equipment of the electric submersible pump
Starikov A.V., Zhivaeva V.V., Polezhaev D.Y.
Abstract
The problem of a choice of an optimum variant of a complete set of installation the submersible pump and the depth of descent for the purpose of minimization of expenses of the electric power at oil recovery is considered. It is noticed that at a capacity choice of the submersible electric motor it is necessary to consider factor of a stock which provides working capacity of installation on speeds above nominal, losses in the frequency converter and falling of efficiency of the electric motor at work with the frequency converter. The formulas are expressed, allowing to define the minimum necessary specific energy consumption on cubic meter of a pumped out liquid from a well at target production rate. It is shown, what not always it is seem possible to pick up precisely the equipment for an optimum variant. Therefore the algorithm of selection of the submersible pump, the electric motor, the connecting cable, the raising transformer and control station from the discrete series which is let out by the industry is resulted. The analytical expression is received, allowing to define the parameters of a working point at the head curve of the submersible pump. The concrete example of a choice of the equipment of the electric submersible pump is considered. It is noticed that application of the frequency converter in control station can lead to the additional expenses of electric energy reducing power efficiency of the electric submersible pump.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):130-138
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Estimating the transmission capacity of the open overhead power transmission LINE
Shishkov E.M., Pronichev A.V., Soldusova E.O.
Abstract
For the purpose of organizing longitudinal compensation for long-distance overhead power transmission lines, the authors proposed in previous works the method of using own distributed capacitance - the construction of the open power transmission line with a split phase, the components of which are electrically isolated from each other in such a way that a part of the components is connected only to the power supply buses, but part is only to the consumer's tires. In the present paper, the limit of the transmission capacity of open overhead lines for different load values is estimated. Mathematical modeling methods used in the MATLAB / Simulink environment using the SimScape SimPowerSystems element library to analyze the efficiency of using open power transmission lines. The initial data for the analysis were geometric configurations of overhead-lines supports and parameters of steel-aluminum wires. The mathematical model is developed for the analysis of load conditions and idling of the open line. The lengths of a three-phase open power transmission line are determined, under which the phenomenon of complete self-compensation is observed. The calculation of the transmission capacity values corresponding to different permanent voltage deviations is performed.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):139-145
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SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS IN THE TI-AL-C-B SYSTEM
Amosov E.A., Kovalev D.Y., Latukhin E.I., Konovalikhin S.V., Sytschev A.E.
Abstract
The possibility of obtaining a solid solution based on the crystal lattice of the MAX phase of titanium carbobalide by the method of self-propagating high-temperature synthesis (SHS) by replacing part of the carbon atoms with boron atoms in the initial charge isinvestigated. The stages of the formation of SHS reaction products during the course of synthesis by dynamic X-ray phase analysis were studied. The effect of boron content in the initial charge on the qualitative and quantitative composition of the products of the SHS reaction is estimated, in particular, on the quantitative ratio of the МАХ phases of the 312 and 211 types formed during the reaction.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):161-171
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Optimization of preventive maintenance period in the laboratory of casting and rolling complex of metallurgical enterprise
Doronin A.V., Kovalenko A.I., Rogachev G.N.
Abstract
The operation of the laboratory of casting and rolling complex is considered as a one-server queue with immediate service and a reserved server (electro-optical spectrometer). The moments of samples incoming for analysis (while casting and rolling corrosion-resistant steel) make a Poisson input. Spectral analysis of samples is carried out correctly with variable probability. The embedded Markov chain stationary distribution is obtained as the solution of integral equations. The problem of multi-criteria optimization of preventive maintenance period is set and solved. Simulation models of the laboratory operation are constructed.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):172-181
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Investigation of solution shs of complex copper and chromium oxides nanopowders and their application in catalytic oxidation of CO
Novikov V.A., Komzolov A.V., Zhadyaev A.A.
Abstract
The problems of environmental protection from the harmful effects of carbon monoxide, due to the use of expensive catalysts were considered. The prospects for cheaper modern catalysts were shown. The regularities of obtaining nanopowders on the basis of oxides of copper and chromium by solution self-propagating high-temperature synthesis (SHS) were considered. The influence of the ratio of Cu/Cr in the mixture of initial components on the phase composition, the morphology of the synthesized powders and their catalytic properties in the oxidation of carbon monoxide was investigated. The prospects of using the solution SHS as a method for producing catalysts for the catalytic oxidation of carbon monoxide were shown.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):182-190
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Electrotechnical complex of induction heating
Zimin L.S., Sorokin A.G., Gorbachevsky N.I.
Abstract
By means of the finite-element method realized programmatically the electrothermal model of system of induction heating for plastic production is simulated by method of casting and electromagnetic and thermal fields are researched. The original system of induction heating for plastic production is offered by a casting method. The main energy indicators and algorithms of work which provide required temperature distribution in the heated polymeric material are determined.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):191-195
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Modeling of the plate heat exchangers in the double-circuit water-supply system
Ivanyakov S.V., Ignatenkov Y.V., Konovalenko D.S.
Abstract
This paper consideres the water-supply systems with a natural cooling. The advantages and disadvantages of the single- and double-circuit water-supply systems are revealed. The analysis of the plate heat exchangers revealed that thermal pollutions in open circuit is much higher than pollutions a closed circuit. It allowed to set up heat transfer equations for the plate heat exchangers and a mathematical model of the heat pollutions increase in open circuit water-supply systems. An accuracy of a modeling allowed to use this model for water-supply system optimization.
Vestnik of Samara State Technical University. Technical Sciences Series. 2017;25(2):196-199
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