Vol 11, No 1 (2012)

Full Issue

AIRCRAFT AND SPACE ROCKET ENGINEERING
Command control of hypersonic cruising aircraft during climb
Balakin V.L., Kotchyan A.G.
Abstract

The problem of forming command control for a hypersonic cruising aircraft during climb is discussed. The motion is analyzed under atmospheric density disturbance and deviations from aerodynamic characteristics of the aircraft. A two-channel control algorithm is proposed: by the angle of attack and fuel consumption per second. The algorithm efficiency as regards compensating the disturbance influence on meeting the final motion conditions is analysed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):9-14
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High fidelity modeling at early stages of airframe structural design
Boldyrev A.V., Komarov V.A.
Abstract

A review of methods for modeling load-carrying structures at the preliminary design stage is presented. The application of elastic body model with variable density to design optimization and weight estimation is considered. The validity of the variable density model is discussed. A number of numerical examples are given.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):15-23
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Up-to-date laser measuring systems in the production cycle of space technique
Grishanov V.N., Oynonen A.A.
Abstract

The paper deals with up-to-date methods of controlling the geometry of products using laser measuring systems. The basic principles of measuring and examples of devices implementing them are described. The advantages of laser measuring systems over contract ones are shown. The difficulties arising in the integration of laser measuring systems into the production chain of the plant are analyzed and the ways of overcoming them are planned.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):24-35
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Approximate correlative-spectral analysis of temperature patterns of combustion chambers
Prokhorov S.A., Ilinsky S.A., Aleksandrova T.G., Solovyova Y.V.
Abstract

The paper presented the results of specifying diagnostic parameters of combustion chambers of gas turbine engines. The results were obtained with the help of an automated system of approximation correlativespectral analysis in the Bessel orthogonal basis by producing models of correlative and spectral characteristics of the initial arrays of temperature values.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):36-46
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Solving tasks of control and targeting for remote sensing devices by systems of processing and analysis of visual information
Sbrodov V.V., Sviridov V.P., Safronov S.G.
Abstract

The article addresses the structure of combined correlation and extreme system for processing and analysis of visual information to assist control and targeting of moving carriers and remote sensing devices, and to ensure real-time recognition of certain fragments of the surveyed scene. The authors describe algorithms of functioning in the following modes: identification of given objects, direction of targeting systems onto the identified objects, stabilization of sightline of the identified object while the carrier keeps moving relative to the surveyed scene. The article also dwells on a method to improve the reliability of guidance in conditions of current information changing in the process of direction. The results of the research in the efficiency of recognition of binary correlation algorithms under such interference as brightness, changes of contrast, picture smearing for different signal-to-noise ratios are presented. The results of experimental tests of the system prototype on a specialized bench are also given.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):47-54
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Prospects of development of methods of maintenance of complex systems of airborne equipment complex
Chekrizhev N.V., Koptev A.N.
Abstract

The paper deals with the principles of a qualitative approach to a perspective method of proactive maintenance for complex systems of aircraft on-board equipment.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):55-62
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MECHANICAL ENGINEERING AND POWER ENGINEERING
Model of the main worm of milling cutters for gear cutting
Androsov S.P., Brailov I.G., Vizigin D.V.
Abstract

The equations of helical surfaces of the main worm of milling cutters designed for gear cutting are defined. They are expressed with parameter vector functions. A computer program is developed for the calculation and construction of the model of the milling cutter main worm.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):63-70
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Theoretical assessment of the influence of temperature on lattice spacing of aircraft gas-turbine engine turbine monocrystals
Badamshin I.K.
Abstract

The possibility of theoretical assessment of monocrystal lattice spacing dependence on temperature is shown. The formula of the dependence is derived. Satisfactory agreement with the results of experiments is obtained. The thermal expansion factor and the modulus of elasticity of eutectic composite components are determined on the basis of the formula derived.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):71-76
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Cramped bending of sheet metal piece curved sides with an elastic medium
Barvinok V.A., Komarov A.D., Kulakov V.G., Moisseyev V.K., Sharov A.A.
Abstract

The paper presents data on the development and research of the process of cramped bending of straight and curved sides of sheet workpieces by an elastic medium. A description of design protected by patents and an invention certificate of the Russian Federation is given. The elastomer working pressure is determined for the implementation of curved side cramped bending by polyurethane in a closed-volume container.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):77-85
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Design and research of characteristics of a pressure fluctuation damping device for electrocontact manometers
Gimadiev A.G., Gimadiev A.A., Ermochkin A.Z., Ilyuchin V.N.
Abstract

A shock absorber for electric contact manometers (ECM) has been developed which makes it possible to measure the greatest (smallest) values of pulsating pressure while maintaining the speed of the measuring circuit. Theoretical and experimental analysis of the shock absorber incorporated into an ECM of hydraulic equipment confirmed its preset efficiency.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):86-93
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Development of yield criteria for the calculation of forming high-textured anisotropic blanks
Grechnikov F.V., Yerisov Y.A.
Abstract

In this article we propose the yield criteria for the calculation of forming high-textured anisotropic blanks, which was developed on the basis of Mises plasticity criterion with regard to the orientation factors and lattice constants.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):94-99
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Stability of a rigid nonsymmetric rotor in elastic-damper sliding bearings
Ermilov Y.I.
Abstract

The paper deals with the stability of a rigid nonsymmetrical rotor with elastic-damper sliding bearings to the influence of both the inner forces of the lubrication layer and to the external disturbing forces acting on the rotor. Design equations are obtained, the results of the calculations and the analysis of rotor stability with and without the action of external disturbing forces are presented for various kinds of elastic-damper bearings.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):100-110
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Research of the process of sheet presswork using polyurethane under constrained bending
Eskina E.V., Gromova E.G.
Abstract

A method of producing profiles by polyurethane stamping under constrained bending has been developed. Research of the stressed strain state of the elastic punch and the blank has been carried out on the basis of a finite-element model. The influence of the main process parameters on the characteristics of the obtained parts has also been analysed using the ANSYS software. Experimental studies have been conducted which confirm the adequacy of the model devised.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):111-117
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Analysis of contact stresses in drawing round products
Kargin V.R., Kargin B.V., Kolesnikova S.Y., Sergeev Y.A.
Abstract

In this work, the drawing of round products in conical dies was simulated by the finite element method (FEM) using special-purpose software DEFORM-2D to analyze contact stresses.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):118-124
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Calculation of skidding in intershaft roller bearings of gas turbine engines
Makarchuk V.V., Zhilnikov E.P.
Abstract

The paper describes methods and results of calculations of sliding in high-speed intershaft roller bearings. It presents the comparison of the results of experimental research in skidding of roller bearings on a test bench, imitating operating conditions of rolling bearings in supports of aircraft gas turbine engines, with calculations based on the computer model of an intershaft roller bearing.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):125-134
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Finite element techniques for pipe system vibroacoustical characteristics modelling
Mironova T.B., Prokofiev A.B., Shorin V.P.
Abstract

The paper presents techniques of finite-element modeling of pipeline vibroacoustic characteristics in case of pipelines being loaded with a pulsating fluid flow. The first technique is designed for a pipeline with the centre line lying in one plane and is based on using seven-node finite elements. The technique of modeling pipelines of a complex space configuration with the centre line not lying in one plane allows for the use of linear finite elements. The techniques are realized in software and they mean considerable reduction of computational costs as compared to previously existing ones. The results of modeling are compared with the experimental data and their convergence is assessed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):135-142
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A hot-wire anemometric transducer of airflow mass rate
Nikolayev V.N.
Abstract

A hot-wire anemometric mass airflow rate transducer is developed. A method of assessing dynamic measurement error on the basis of constructing mathematical models of the transducer’s unsteady heat exchange is proposed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):143-152
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Peculiarities of strain behaviour and stressed state of plates made of unbalanced laminated composite materials
Pervushin Y.S., Soloviev P.V.
Abstract

The paper is devoted to the influence of unbalanced structures of multilayer composite materials produced by deviations of layer placement angles and faults in placement succession on the stressed state and strain behavior of laminated plates during bending. The influence of imbalance during bending is investigated on double-support restrained plates of rectangular cross-section acted upon by a load distributed over the surface for different numbers of layers. The results of imbalance influence on the strained and stressed state of multilayer plates are presented.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):153-160
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Method of producing thin-walled conical parts in a die with an elastic element
Popov I.P., Nesterenko E.S., Zimarev M.V.
Abstract

A new way forming of thin-walled conical parts in a die with an elastic element is proposed. In this method, the conditions of formation are considerably facilitated due to eliminating the reactive tangential stresses on the surface of the contact of the part and the elastic element. That will make it possible: to increase the height of stamped parts, to prevent losses of stability of the stamped part, to increase the maximum coefficient of forming.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):161-169
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System design of follow shearing dies for cutting sheet blank
Pochekuev E.N., Skripachev A.V., Shenberger P.N.
Abstract

We consider the process of system design of follow shearing dies for cutting sheet blanks. Structural and logical formulas are defined and they represent possible designs of these dies with the proposed signs of assemblies and parts. A mathematical model of the structure of dies is developed based on the methods of discrete mathematics.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):170-177
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Influence of the direction of ultrasonic vibrations on the formation of residual stresses in thread pieces made of titanium alloys
Romashkina O.V., Karanaeva O.V.
Abstract

The paper deals with the influence of magnitude and direction of ultrasound vibrations in the process of thread cutting on the magnitude and sign of residual stresses and their distribution in the surface layer of pieces made of titanium alloys. The results obtained confirm real prospects of improving the characteristics of fatigue resistance of thread pieces by changing various technological parameters of ultrasonic treatment.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):178-182
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The influence of the heat processing and plastic deformation modes on the formation of the aluminum alloys structure
Savelyeva O.G.
Abstract

A link between structural indicators and mechanical properties of aluminum alloys AMg10 and D16 has been established. Factors are proposed that depend on changing the structure and are directly relate to mechanical and technological properties. The influence of the parameters of the plastic deformation mode, recrystallization annealing, as well as ageing on the formation of residual stresses of the I, II, and III rind has been analysed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):183-195
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ELECTRONICS, MEASURING EQUIPMENT, RADIO ENGINEERING AND COMMUNICATION
Sharp focusing of a linearly-polarized vortical beam by means of a microaxicon
Degtyaryov S.A., Khonina S.N.
Abstract

The possibility of forming a compact focal spot with the help of a conical microaxicon in case of linear polarization of a lighting beam by introducing vertical phase dependence into the beam is shown on the basis of the difference method of solving Maxwell’s equations.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):196-206
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CONTROL, COMPUTER SCIENCE AND INFORMATION SCIENCE
Calculating maximum amplitude in an oscillatory system with many-valued perturbation
Lepilov A.N.
Abstract

The paper deals with the task of determining maximum amplitude of harmonic oscillations with a small external many-valued perturbation. An averaged differential inclusion is constructed in order to solve it using the method of support functions. It mutually approximates the initial system on slow variables over the time interval [0,1/ m], where m is perturbation. The problem of calculating the maximum average for the periodic function arises which is solved by an approximate method.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):207-210
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Classification of models of basic links in the air transport sector in the context of the process of macrologistic system formation and development
Pakhomov A.A.
Abstract

Air transport sector is studied on the macrologistic basis, a classification of lines, typical for this sector, is presented. Large air companies are reviewed as links of a macrologistic system and a classification of models of these air companies is proposed depending on the aims, functional characteristics and the process of formation.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):211-218
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Visual approach to verifictaion of real-time control software
Tyugashev A.A., Bogatov A.Y., Shulyndin A.V.
Abstract

The paper is devoted to the problem of verification of critical real-time control programs, for example, verification of spacecraft onboard software. A special software complex supporting visual verification of correct synchronization between the controlled processes is described in the paper. A semantic model of real-time control algorithm is also provided.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):219-225
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ECONOMICS AND HUMANITIES
Increase of the role of conformity assessment at the facilities controlled by the federal service on ecological, technological and nuclear supervision
Barvinok V.A., Naumov L.A., Dolgikh A.V.
Abstract

The analysis of methods of assessing the conformity of hazardous production facilities supervised by Rostechnadzor is carried out. Measures to improve the quality of conformity assessment, the role of which is of great importance in reducing the influence of negative factors in the field of industrial safety are developed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):226-232
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Use of artificial intelligence for retail trade enterprise goods turnover analysis and forecast
Ibragimov A.U., Ibragimova L.A., Gilmullina G.I.
Abstract

Groups of factors influencing goods turnover of a retail trade enterprise are given. Analysis algorithms and forecasting of the results of activity of a retail trade enterprise with the use of artificial neural networks and fuzzy logic methods are described.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):233-241
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Assesment of commercial enterprise personnel competence using fuzzy logic method
Ibragimov A.U., Ibragimova L.A., Karavaeva M.V.
Abstract

The paper deals with the application of fuzzy logic method for estimating the competence of personnel. It presents the results of approbation of this method at a commercial enterprise in Izhevsk.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):242-249
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The process of creating the system of multi-level continuous vocational training of specialists
Stolbov V.I.
Abstract

The paper describes a system of multilevel continuous professional training of specialists on the basis of the “worker-technician-engineer” model which contributes to the continuity of technical education and is successfully implemented at Togliatti Polytechnic Institute.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2012;11(1):250-258
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