Vol 7, No 1 (2008)

Full Issue

AIRCRAFT AND SPACE ROCKET ENGINEERING

Choosing the form of space vehicle designed for descent in the rarefied atmosphere of Mars

Aslanov V.S., Ledkov A.S.

Abstract

The paper deals with choosing the form and centre of inertia position of a space vehicle with a view to eliminating resonance which occurs during unguided descent in the rarefied atmosphere of Mars. Blunted small-elongation space vehicles consisting of a conical part and a spherical one are discussed. The criterion of absence of resonance is obtained analytically with the help of Newton’s shock theory. Practical recommendations on choosing the form of a space vehicle are given to eliminate the possibility of resonance arising.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):9-15
pages 9-15 views

Orbital tether system motion equations considering space vehicle vibrations

Aslanov V.S., Stratilatov N.R.

Abstract

The paper describes a mechanical system that includes a space vehicle (SV), a tether and end load. The SV is presented as a solid body that executes the motion of and around the centre of inertia under the effect of gravitational moment and tether tension moment. A mathematical model of plane motion of the mechanical system presented is obtained with the help of a Lagrangian equation of the second order. It is shown that the model obtained can be used both for tether system deployment analysis and for the study of the SV behavior.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):16-22
pages 16-22 views

Optimizing the propulsion of a hypersonic accelerator aircraft of a two-stage aerospace system

Balakin V.L., Bebyakov A.A., Kotchyan A.G.

Abstract

The paper deals with the propulsion of a hypersonic accelerator aircraft acting as the first stage of a two-stage aerospace system. Optimal and approximately optimal angle of attack programmes are defined on condition that fuel consumption is minimal. The impact of the trajectory inclination finite angle magnitude on the pattern of control programmes and mechanical trajectories is analysed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):23-32
pages 23-32 views

Parameter measurement quality control in automated testing of series gas turbine engines

Botchkaryov S.K.

Abstract

The paper deals with methods of controlling the quality of parameters measured and rejecting anomalous measurements in automated testing of series gas turbine engines. The methods are based on the use of statistical data on the magnitude of natural spread in the parameters of series engines and on the regularity of interrelations of deviations of various parameters within the spread.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):33-36
pages 33-36 views

Identification of a gas turbine engine mathematical model by the ressults of testing

Botchkaryov S.K., Dmitriyev A.Y.

Abstract

The paper deals with the identification of a linear mathematical model of gas turbine engines by the results of testing using the simplest Huber method with regard to additional information on engine parameter measurement error and possible magnitudes of parameter variations characterizing unit operation.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):37-39
pages 37-39 views

Automated restoration of gas turbine engine characteristics by experimental data

Botchkaryov S.K., Mosoulin V.V.

Abstract

The paper presents methods of selecting the best mathematical models of engine throttle characteristics and using these when defining engine throttle characteristics by experimental data. Huber robust regularization method is shown to yield the best result under engine characteristics automated restoration with the smallest amount of experimental data.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):40-44
pages 40-44 views

Approximate methods of calculating optimal flights of space vehicles with low-thrust engines. Part II

Salmin V.V., Vassiliev V.V., Ishkov S.A., Romanenko V.A., Sokolov V.O., Starinova O.L., Yurin V.V.

Abstract

The second part of the article presents the results of solving some applied problems of flights of space vehicles with low-thrust engines.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):45-67
pages 45-67 views

System of artificial intellect support of low-thrust spacecraft interplanetary mission optimization

Starinova O.L.

Abstract

The paper deals with an information computational system of artificial intellect support of low-thrust interplanetary ion optimization. By mission optimization is meant joint optimization of lows of control as well as spacecraft motion trajectories and design parameters which correspond to them. The system is based on the use of up-to-date dynamic data processing methods obtained on the sequence of refined mission models.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):68-79
pages 68-79 views

Developing a mathematical model of aircraft honeycomb sandwiches

Tits S.N.

Abstract

A vibrational model of a three- layer honeycomb sandwich with partial skin peeling has been developed. The impact of peeling amount on the natural frequency of vibration and the amplitude-frequency characteristic has been analysed. Comparative analysis of design values and experimentally obtained results has been made.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):80-91
pages 80-91 views

Structural model of individual forecasting of space radioelectronic equipment parameters

Tyulevin S.V., Piganov M.N.

Abstract

The paper presents the analysis of a structural model of individual forecasting of space radioelectronic equipment reliability parameters.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):92-96
pages 92-96 views

MECHANICAL ENGINEERING AND POWER ENGINEERING

Choice of materials for making inductor systems

Barvinok V.A., Palamartchuk Y.Y., Kirilin A.N., Samokhvalov V.P., Vershigorov V.M.

Abstract

The paper presents the results of experimental investigations concerning the choice of materials for making current-conducting and frame elements of inductors for pulse magnetic forming. Various kinds of inductor construction are considered, their efficiency as to the amount of deformation of a tubular blank is determined. Recommendations on the designing of operating inductor systems for production conditions are given.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):97-102
pages 97-102 views

Experimental investigations of thermal fields in inductor system under magnetic pulse forming

Barvinok V.A., Palamartchuk Y.Y., Kirilin A.N., Samokhvalov V.P., Vershigorov V.M.

Abstract

The paper describes the basic classes of inductor systems used in magnetic pulse forming. Factors having effect on the service properties of the construction are noted. The basic modes of inductor system operation are discussed: at high-frequency and low-frequency installations and in the multicycle loading mode. Analytical expressions are given that make it possible to determine the average temperature of a current-conducting inductor.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):103-110
pages 103-110 views

Modelling of a municipal transport route network

Belokurov S.V.

Abstract

The paper deals with the problem of constructing models of circular route networks tasking account of the specificity of municipal passenger transport.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):111-120
pages 111-120 views

Modelling changes of condition of aircraft hydraulic system working fluid

Gareyev A.M.

Abstract

The paper presents a model of working fluid condition changes in an aircraft hydraulic system during the overhaul period. The model is developed on the basis of Marcov process theory and intended to define the working fluid purity using lead maintenance technologies in an effort to increase life expectancy of aircraft hydraulic system components.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):121-127
pages 121-127 views

Solving equations of thin-walled multistringer torsion box design in view of geometrical non-linearity

Kuznetsov O.R.

Abstract

A procedure of thin-walled multistringer torsion box design in view of geometrical non-linearity is proposed. Initial non-linear relations are linearized by the successive loading method. Solving equations are obtained by using the Lagrange principle; these are presented in the form of a boundary problem for a system of ordinary linear differential equations.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):128-138
pages 128-138 views

Impact of smooth part residual stress distribution on additional stresses in case of leading surface plastic deformation

Pavlov V.F., Kirpitchyov V.A., Deniskina Y.A., Semyonova O.Y.

Abstract

The paper deals with distributions of residual stresses of reinforced smooth part as well as additional compressing residual stresses after making a semicircular profile notch. Various laws of changing axial residual stresses of a smooth part which simulate practically all possible cases of their distribution after reinforcing the parts by known methods of surface plastic deformation are also discussed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):139-146
pages 139-146 views

The effect of inductor systems on the efficiency of magnetic pulse forming

Palamartchuk Y.Y., Kirilin A.N., Vershigorov V.M.

Abstract

The paper presents the results of investigations related to the realization of efficient technology of magnetic pulse working. Higher process efficiency is due to the optimization of energy transfer in a discharge circuit and the transformation of pulse field pressure into deformation work and blank kinetic energy. The basic expressions that make it possible to determine the amount of losses of energy stored in the system’s capacitors as it is transformed into blank deformation work.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):147-151
pages 147-151 views

Mathematical model of sequential feeders for centralized lubrication systems

Rybaltchenko D.Y., Shakhmatov Y.V., Belov G.O., Ilyukhin V.N.

Abstract

The paper presents a system of differential and algebraic equations governing the operation of a sequential feeder. The block diagram of realization of equations that constitute a mathematical model of a sequential feeder is given. It allows making analysis of operating characteristics of sequential feeders and lubrication systems based on them in the Simulink system of modelling dynamic processes. The results of full-scale tests which confirm the adequacy of the mathematical model developed are presented.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):152-161
pages 152-161 views

Method of calculating currents of a group of parallel electric arc steel melting furnaces

Saltykov A.V.

Abstract

The paper presents a method of calculating electrical and operating characteristics of any number of parallel EASMFs due to the reduction of furnace circuit resistances to high-voltage buses and the use of the method of superposition. It is shown that in order to determine the combined operating current of parallel EASMFs at the method of adding series-parallel resistances of a group of EASMFs and the method of EASSF operating currents according to the cosine law can be used. It has been found that determining the combined operating current of parallel EASMFs by simple adding of operating currents leads to insignificant errors.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):162-167
pages 162-167 views

Elastic-and-plastic problem for a thin plate with a non-yhrough crack cut for the case of localized strain according to rigid plastic flow schemes

Stepanov S.L.

Abstract

An elastic-and-plastic problem of the tension of a thin plate with a non-through (surface) cut is formulated. The process of plastic deformation of material both along the entire length of the cut and in plastic areas at its apices is modelled according to rigid plastic flow schemes, which makes it possible to take into consideration the changes in plate geometry along the thickness in the vicinity of the non-through cut and along its length. The solution of Fredholm’s integral equation in quadratures is obtained and the procedure for defining numerical results is designed. The dependence of the cut side opening on plate thickness and depth is defined in an explicit form. Cut side opening is used as deformation rupture criterion.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):168-173
pages 168-173 views

Rectangular cantilever plate bending with regard to transverse shear deformation

Sukhoterin M.V.

Abstract

The paper proposes an iteration method of correction function superposition for initial estimate in the form of hyperbolic-trigonometric series by two coordinates,which as they are superimposed,mutually compensate the misclosures they generate in boundary conditions. The misclosures decrease as the number of iterations grows and a solution can be obtained with any degree of accuracy. Numerical results of calculating deflections and bending moments of a Reissner cantilever plate under uniform loading are presented. Comparison with the classical theory is given.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):174-180
pages 174-180 views

ELECTRONICS, MEASURING EQUIPMENT, RADIO ENGINEERING AND COMMUNICATION

Analysis of the error of non-linearity of positional characteristics of a displacement transducer on multicomponent optronic structures

Matyunin S.A., Stepanov M.V.

Abstract

The paper deals with calculating the error of non-linearity of positional characteristics of a displacement transducer on multicomponent optronic structures.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):181-185
pages 181-185 views

CONTROL, COMPUTER SCIENCE AND INFORMATION SCIENCE

Method of assessing the quality of production processes and mounting of technical systems considering latent consumer

Barvinok V.A., Klotchkov Y.S., Lyubimov M.V.

Abstract

The paper deals with the problem of assessing the quality of production processes and mounting of technical systems considering the presence of latent consumer. Procedures of assessing the quality of life cycle processes are specified. Tools for analyzing requirements from the standpoint of the process owner are formed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):186-195
pages 186-195 views

Models and algorithms of choosing solutions on search iterations in numerical vector schemes

Belokurov S.V.

Abstract

The paper deals with the problem of choice and taking decisions as well as with the problems of modelling that occur when using numerical vector schemes on search iterations.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):196-200
pages 196-200 views

Model of knowledge in the expert system of aid to the crew

Vorontsov A.A.

Abstract

The paper deals with knowledge formation in the expert system of aid to the aircraft crew for the subject area «Aircraft crew actions in emergency situations». A combined hierarchical model of knowledge formation is proposed, based on object approach, production rules and Petri network structure. The knowledge formation developed makes it possible to for man integral model of the subject area for the analysis of database and knowledge conclusion mechanism.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):201-207
pages 201-207 views

Computer-aided-design system for calculating adsorption thermodynamic characteristics

Zelenko L.S., Varfolomeyeva V.V., Kuznetsov V.Y., Fed’kayev A.V., Terentyev A.V., Buryak A.K.

Abstract

A CAD system for calculating adsorption thermodynamic characteristics has been developed which makes it possible to simulate the process of physical adsorption for molecules of various classes of organic compounds on the surface of graphitized thermal black. The system makes it possible to perform calculations for molecules capable of internal rotation, for all possible conformations.A three-dimensional model has been constructed which makes it possible to check whether the input of the molecule’s initial geometric parameters is correct. It also allows exporting the data obtained to the table processorMS EXCELfor their further treatment.The system’s capabilities are shown with practically important molecules as compared to experimental data.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):208-218
pages 208-218 views

Modelling the architecture of a system controlling the condition of maintenance objects

Koptev A.N., Yergaliyev D.S., Sakhanov K.Z.

Abstract

The paper present a model of forming a set of a measurable multitude of parameters for assessing the technical condition of an airborne equipment complex (AEC) of aircraft in the context of a diagnostic control system represented by a network which incorporates generatices as basic images. A set of axioms is proposed for forming the assessment of generatrix condition on the basis of indication vector, the generatrices presenting theAEC system being diagnosed. The architecture of a system of diagnostic control of the maintenance object condition in the form of a network whose functioning is connected with the system of axioms introduced is also proposed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):219-225
pages 219-225 views

Random process presentation by non-canonical decomposition

Perov S.N., Skvortsov Y.V.

Abstract

When solving a problem of statistic dynamics it is necessary to build its selected functions-realizations- by the known probability characteristics of an input random function. This problem is solved by presenting random processes as determinate functions of a set of random variables. Linear canonical decompositions of random functions are most commonly used. They are convenient to use in linear system analysis. It is, however, hardly feasible to use canonical decomposition on basic coordinate functions in order to solve a non-linear problem. This paper deals with a non-linear non-canonical form of presenting random processes proposed in [1].

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):226-235
pages 226-235 views

Method of choosing algorithms for assessing the degree of correspondence of objects to their functional purpose with regard to their efficiency and metrological characteristics

Ryzhakov V.V., Kuznetsova M.V., Ryzhakov M.V.

Abstract

The concept of algorithm is analysed. A method of choosing algorithms on the basis of dispersion analysis is proposed and considered as a method of assessing metrological characteristics of algorithms of the degree of object correspondence to functional purpose. Various algorithms are examined.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):236-242
pages 236-242 views

Analysis of industrial subject area stability and dimensionality characteristics using automated systems of document turnover

Khaimovitch I.N.

Abstract

The paper deals with the questions of automatization of document turnover systems at the stage of analyzing industrial subject area. Statistical studies substantiating quantitative characteristics in designing a conceptual data model are presented.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):243-247
pages 243-247 views

Procedure rules of press forging business process development and coordination

Khaimovitch I.N., Khaimovitch A.I.

Abstract

The paper deals with the question automatization of models of basic business processes of press forging design and technological preparation. Ways of reducing the time of technological preparation of production due to the use of computer-aided document turnover in production processes are shown. The use of a resource-oriented approach for the modeling of industrial subject area is proposed, the required functional model decomposition indicator is defined on the basis of document status, data model patterns are specified.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):248-252
pages 248-252 views

HUMANITIES

Engineering creative work of machine builders in the Middle Volga Region in 1971 – 1975

Pridatkin A.V.

Abstract

The paper deals with forms and methods of involving engineering workers in creative work, in rationalization and invention movement at machine building enterprises of the Middle Volga Region in 1970s.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):253-260
pages 253-260 views

Product life cycle in the aspect of postulates of logistics and labour object theory

Sosnina T.N.

Abstract

The paper proposes a way of treating consumer cost and cost parameters of a product life cycle with regard to the postulates of logistics and labour object theory.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2008;7(1):261-268
pages 261-268 views

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