Vol 6, No 1 (2012)
- Year: 2012
- Articles: 65
- URL: https://journals.rcsi.science/2074-0530/issue/view/3819
Articles
CALCULATION OF THREADED JOINTS UNDER ACTION OF CYCLIC AND IMPACT SHEAR LOAD
Abstract
The authors developed and presented methods for calculating of threaded joints under dynamic (cyclic and impact) load applied along the planes parallel to the joint, considering energy dissipation for structural damping when installing the bolts with a gap and without gap.
Izvestiya MGTU MAMI. 2012;6(1):9-16
9-16
METHOD OF OPTIMIZATION OF THE LAWS CONTROLLING VEHICLE SUSPENSION CONSIDERING OPERATING CONDITIONS
Abstract
The authors presented the method for formulating and solving problems with multiobjective parametric adjustable parameters. There are proposed three options for solving the problem. The authors suggested the characteristics of suspension design parameters control of class passenger "B" car considering road microprofile.
Izvestiya MGTU MAMI. 2012;6(1):16-22
16-22
23-26
REDUCTION OF THERMAL STRESSES IN THE PLATE HEAT EXCHANGER AT NONSTEADY OPERATIONAL MODES
Abstract
This article considers the solution of strength problems of a plate heat exchanger used in air conditioning systems in aircraft cabins on the nonstationary operating conditions. The authors proposed the scheme of structural improvements, the model is calculated in elastic and elastic-plastic formulation and there are presented conclusions and proved advantages of the proposed heat exchanger design.
Izvestiya MGTU MAMI. 2012;6(1):26-34
26-34
SYSTEMIC EVALUATION OF CONTROLLABILITY OF WHEELED MACHINES
Abstract
The paper deals with the most important problems of the theory of wheeled and tracked vehicles, associated with the concepts of controllability, observability and vehicle stability. There are fundamental theoretical research on direct estimations of dynamic properties of an object, but the current level of reflection requires a systemic approach to solving those problems, and deal with the theoretical studies.
Izvestiya MGTU MAMI. 2012;6(1):34-41
34-41
PERFECT AND IMPERFECT NONHOLONOMIC KINEMATIC CONNECTIONS OF THE ROAD WHEEL WITH SURFACE
Abstract
In the work there are various types of equations describing nonholonomic kinematic connections of the road wheel with the supporting surface. The authors deal with evidence of the adequacy of the results of the pilot studies, and provide justification for the use of each equation type.
Izvestiya MGTU MAMI. 2012;6(1):41-46
41-46
OPTIMIZATION OF TRAILER DESIGN PARAMETERS CONSIDERING ENSURING OF STABILITY AND CONTROLLABILITY OF ARTICULATED TRUCK
Abstract
The authors considered the method for improving the stability and controllability of two-section truck to optimize the design parameters by the minimax method. Optimality criteria are the tractor vehicle steering speed at straight-line motion and lateral acceleration of the trailer for the curvilinear motion. The calculations were performed using the spatial scheme, the coefficients of wheel slipper resistance and the trailer drawbar length, mass ratio for trailer and vehicle, location of cargo in the trailer.
Izvestiya MGTU MAMI. 2012;6(1):46-52
46-52
INCREASE OF EFFECTIVENESS OF A ROTARY HEAT EXCHANGER OF A SMALL-SIZE GAS TURBINE ENGINE
Abstract
The article contains the results of the design study of thermal-hydraulic characteristics of the rotary frame heat exchanger with conical heat transfer elements. Calculations were carried out in a finite element package Ansys CFX 13. The authors analyzed the influence of switching devices on the efficiency of the heat exchanger.
Izvestiya MGTU MAMI. 2012;6(1):52-58
52-58
REDUCTION OF AERODYNAMIC NOISE OF THE EXHAUST VALVE OF AIR EXCHANGE SYSTEM ON VEHICLES
Abstract
This paper describes how to improve the construction of the splitter of valve of air exchange system on vehicles. To optimize the operation of the valve at G = 2000 kg / h, ДP = 0,36 kg/cm2 were designed several constructions of the splitter. The paper presents two options for modifications of the splitter of valve with the best results of acoustic calculations.
Izvestiya MGTU MAMI. 2012;6(1):58-64
58-64
THEORETICAL JUSTIFICATION OF REQUIREMENTS FOR THE AUTOMATIC ADAPTIVE CONTROL OF ELECTRIC TRANSMISSION OF THE FOUR-AXLE ALL-WHEEL DRIVE VEHICLE WITH INDIVIDUAL WHEEL DRIVES
Abstract
The paper presents the results of the studies of developed mathematical model of straight line motion of the four-axle all-wheel drive vehicle with individual adjustable electric wheel drives, allowing justification of the system requirements for an automatic adaptive control of electric transmission of the vehicle, reducing the influence of negative factors when moving through a single sinusoidal obstruction.
Izvestiya MGTU MAMI. 2012;6(1):64-71
64-71
71-74
PROCESSING OF VEGETABLE FATS INTO GASEOUS HYDROCARBON FUEL IN MULTICOMPONENT PLASMA CONVERTER
Abstract
The authors offer the methods of the plasma-chemical pyrolysis of hydrocarbon organic raw materials on the basis of arc plasma device of low power for manufacture of fuels and energy from organic hydrocarbons by the method of plasma conversion which favourably differs from known before installations.
Izvestiya MGTU MAMI. 2012;6(1):74-78
74-78
USAGE OF MULTIPARAMETER NEURAL NETWORK MODEL TO CONTROL POWER UNITS ON THE BASIS OF INTERNAL COMBUSTION ENGINE
Abstract
The paper describes the ways for creation of hardware and software for automated multi-parameter optimization of internal combustion engines control, operating on the quasi-stationary modes as a part of a vehicle, in order to reduce toxicity and improve fuel economy. The authors denote the choice of method for solving the problem and main results.
Izvestiya MGTU MAMI. 2012;6(1):78-84
78-84
MATHEMATICAL MODELING OF HYDRAULIC DRIVE OF A FAN FOR AUTOMOTIVE ENGINE COOLING SYSTEM
Abstract
The article presents a mathematical model of hydraulic drive of a fan for cooling automobile engine, equations, block diagrams of elements of the hydraulic system. As the flow model to describe the heat transfer process the model of ideal mixing is adopted. The authors got the mathematical model of the hydraulic drive and the corresponding transients.
Izvestiya MGTU MAMI. 2012;6(1):84-95
84-95
DEVELOPMENT OF HYDROGEN POWER PLANT OF A NEW GENERATION
Abstract
The article considers the possibility of usage of alternative fuels based on hydrogen. The authors performed the analysis of the advantages and problems of hydrogen fuel usage, and considered the concept of an engine with direct injection of hydrogen into the cylinder, efficiency and environmental friendliness.
Izvestiya MGTU MAMI. 2012;6(1):96-101
96-101
SYSTEMS OF VEHICLE ELECTRICAL POWER SUPPLY WITH INTELLECTUAL ALGORITHMS PROVIDING INCREASE OF ECOLOGICAL AND POWER INDICATORS
Abstract
The article examines the intellectual systems of electrical supply of the vehicles, using optimal algorithms of operation providing decrease of engine exhaust gases toxicity and fuel consumption by the engine for generator drive, stability of onboard network voltage and specified charging state of the battery. There is given the classification of intellectual adaptive systems of electrical supply depending on solved problems. The authors present the examples of the algorithms reducing emissions into the atmosphere and vehicle fuel consumption.
Izvestiya MGTU MAMI. 2012;6(1):101-104
101-104
Quality and reliability of systems of an electrical supply of independent objects
Abstract
In article quality and reliability of systems of an electrical supply of independent objects is considered. Quality of the electric power which various infringements and distortions of the form of feeding pressure influence first of all concerns concept of quality. We will especially notice that the electrical supply depends on quality of the electric power and reliability of an electrical supply, according to the developed technical practice, the basic means of maintenance of reliability and quality of an electrical supply are sources of an uninterrupted food and the best indicators of reliability of an electrical supply it is possible to receive, using reserved systems with architecture «a power file».Keywords: hybrid vehicle, electro-mechanical complex, electrical converter, stop-start system, regenerative braking, finite element method, thermal process, electromagnetic process, starter-generator unit, rotor, stator.
Izvestiya MGTU MAMI. 2012;6(1):104-112
104-112
MATHEMATIC MODEL OF GEAR SHIFTING BY FRICTION CLUTCHES IN TRANSMISSION OF TRACTOR
Abstract
The article considers the process of gear shifting by friction clutches in the tractor transmission with various ratios of gear overlapping. The authors developed the mathematical model of the tractor unit acceleration during gear shifting by friction clutches, based on which obtained the analytical dependence for determination of the time of slipping and slipping work of engaging clutch for any ratio of gear overlapping and acceleration time of the tractor unit on a given gear.
Izvestiya MGTU MAMI. 2012;6(1):112-122
112-122
METHODS OF FUEL PRODUCTION FROM ORGANIC RAW MATERIALS BY PLASMA CONVERTERS
Abstract
The conducted analysis of methods of reception of fuels and energy from organic raw materials allows to make a conclusion that application of plasma converters provides rupture of intermolecular communications of hydrocarbonic raw materials by fast pyrolysis of initial components with the subsequent synthesis of the new substances differing by physical and chemical properties from the initial.
Izvestiya MGTU MAMI. 2012;6(1):122-125
122-125
USE OF FORMAL METHODS TO OBTAIN THE MATHEMATICAL MODEL OF AN OSCILLATORY SYSTEM
Abstract
In relation to the dynamical system, designed to study the longitudinal oscillations of the frame of tractor wheel vehicle, the authors developed the mathematical model of its motion on the basis of traditional methods and use of formal methods. The authors give the comparative evaluation of these methods.
Izvestiya MGTU MAMI. 2012;6(1):125-130
125-130
METHODOLOGICAL FEATURES OF DEVELOPMENT OF THE ARCHITECTURE OF INTELLIGENT TRANSPORT SYSTEMS
Abstract
Tha paper contains the proposals on the organization of the development and deployment of intelligent transportation systems. Rational directions of creation of telematic transport systems are justified: development of system architecture, invariant to functional tasks, and the development of components, ensuring the solution of specific functional tasks.
Izvestiya MGTU MAMI. 2012;6(1):130-138
130-138
139-142
142-151
151-156
MECHANICAL PROPERTIES OF POWDER MATERIALS AFTER MULTICOMPONENT DIFFUSION SATURATION OF CR, NI AND MO
156-160
160-162
162-166
166-168
ASSURANCE OF THE QUALITY OF PROCESSING OF COMPLEX CONTOURED PARTS ON MACHINES WITH VARIABLE ELEMENTS
Abstract
The article highlights the problems arising during processing of parts with a complex contoured profile. There are considered all the stages of formation of the geometrical image of the machine with variable elements. The authors formed a complex of 3D-geometric models of Finc Tech SMV-450-H3 milling machining center, which allows to quickly edit the components without changing the overall structure of the model.
Izvestiya MGTU MAMI. 2012;6(1):168-174
168-174
QUALITY MANAGEMENT OF TECHNICAL PRODUCTS ON THE STAGES OF DEVELOPMENT
Abstract
Quality management methods for products at stages of technical and working projects are considered. At the stage of engineering design in improvement in quality standardization and unification indexes have major importance. At the stage of execution plan for detection of weak places in a products design there is applied a method of optimization of technical products on the basis of a simplex method. As a result of a preliminary estimate of prospective quality of products and making changes in the documentation, labour input and the cost of obtaining of quality products during their manufacture considerably decrease.
Izvestiya MGTU MAMI. 2012;6(1):174-180
174-180
STUDY OF FINE STRUCTURE OF INFRASOUND AND ELECTROMAGNETIC FIELDS OF A VEHICLE
Abstract
Investigation of the fine structure of infrasound and electromagnetic fields (the spatial distribution of amplitude and energy parameters) in a confined space will solve fundamentally new problems to reduce the negative effects of these fields on humans.
Izvestiya MGTU MAMI. 2012;6(1):180-184
180-184
184-186
ENVIRONMENTAL DESIGN OF CAST AUTOMOTIVE STRUCTURES BASED ON THE INNOVATIVE METHOD OF DETERMINATION OF DYNAMIC YOUNG'S MODULUS AND POISSON'S RATIO
Abstract
On the basis of the developed innovative methods of environmental planning and determination of physical-mechanical characteristics of cast structures (patent No. 2431819 of 20.10.2011 Bull. № 29), first obtained the structures with the specified physical and mechanical characteristics, ensuring minimal negative impact on the environment in the life cycle.
Izvestiya MGTU MAMI. 2012;6(1):186-190
186-190
STUDY OF COLLOIDAL GRAPHITE THERMAL BARRIER COATINGS FOR HIGH-CARBON STEELS
Abstract
This paper presents research and methodology of choice of colloidal graphite coatings for high-carbon steel workpieces. The authors give a comprehensive study of colloidal graphite surfaces. The method of optimal choice of colloid-graphite coating considers physico-chemical and technological properties of the coating. Selected colloidal graphite coating on the proposed method were used in the calibration process for semi bearing rings.
Izvestiya MGTU MAMI. 2012;6(1):190-196
190-196
DETERMINATION OF FRICTION COEFFICIENT BY COMPRESSION OF RING SAMPLE DURING HOT DEFORMATION
Abstract
This paper presents an algorithm for the calculation of the coefficient (index) of friction at compression of the ring in hot deformation. The calculation considered the temperature-speed parameters of hot deformation: temperature of the workpiece, temperature of dies, the thermophysical properties of material of a workpiece and a die, parameters of equipment. Calculated curves for μ = μ (r). The authors give the comparative results of calculations and experiments on compression of ring samples in hot conditions.
Izvestiya MGTU MAMI. 2012;6(1):196-200
196-200
NUMERICAL STUDY OF FRICTION AT UPSET FORGING WITH RADIAL EXTRUSION OF PARTS OF ROD WITH A THICKENING-TYPE OF ALUMINUM ALLOY AD1
Abstract
The authors investigated the effect of contact friction on the flow of a material in combined process with a running a hotbed of deformation. The different ways of defining the boundary conditions of the contact between the deformable material and surfaces of the instrument. Numerical modeling of the process was conducted using software package QFORM, based on the finite element method. The process under consideration is complex. The height of bulges formed at the core of the piece, taken as a control parameter when performing a comparative analysis of the results of computer simulations with experimental results. Investigated is the influence of the friction factor, which determines the height of the bulges, its shape and material flow. The results of computer simulation are compared with experimental results. The authors achieved a good qualitative and quantitative agreement.
Izvestiya MGTU MAMI. 2012;6(1):200-210
200-210
ANALYSIS OF MUTUAL COMPATIBILITY OF GEOMETRICAL AND PHYSICAL-MECHANICAL CHARACTERISTICS OF THE SURFACE LAYER OF TITANIUM ALLOY PRODUCTS AFTER ULTRASONIC MACHINING
Abstract
The article describes the technology of metal finishing by surface-plastic deformation to improve the quality of the surface layer. The authors conducted the analysis of the mutual compatibility of geometrical and physical-mechanical characteristics of the surface after ultrasonic machining and gave practical advice on quality management of received products.
Izvestiya MGTU MAMI. 2012;6(1):211-218
211-218
COMPARATIVE EVALUATION OF THE ERROR IN GRINDING OF BEARING RINGS
Abstract
The article considers the method of selecting of grinding mode at the operation design stage. The authors developed the mathematical model of process of grinding of a bearing ring. There are obtained numerical values of the error of machining of internal surfaces of bearing rings for different schemes grindings.
Izvestiya MGTU MAMI. 2012;6(1):218-223
218-223
223-226
226-229
APPROXIMATE SOLUTION OF THE CONTACT PROBLEM FOR THE TWO-LAYER FLEXIBLE COATING OF A SOLID CYLINDER
Abstract
The paper considers an approximate analytical method of solution of the problem on contact interaction of the two-layer flexible coating of a solid cylinder with another solid cylinder (without coating). The method is based on the assumption that contact pressures vary by cosine law and geometric conditions of the contact comply in three points of contact area.
Izvestiya MGTU MAMI. 2012;6(1):230-234
230-234
VALUE OF EXACT DECISIONS OF EQUALITY OF MOTION OF VISCID LIQUID NAVIER-STOKES
Abstract
The paper presents the decisions of equations of N. A. Slyozkin of steady motion in te laminary mode of incompressible viscous fluid under axisymmetrical flow. On the basis of exact decision of equation of Slyozkin (of Rikkaty-type) there is shown multiplicity of decision of this equation, thus physical sense has a small number of decisions only. The simplest case of unvortex decisions is considered, for which steam-lines can be circumferences, ellipses, parabolas, hyperbolae and lines. These flows are not stream.
Izvestiya MGTU MAMI. 2012;6(1):234-249
234-249
THE FLUTTER OF A PLATE OF VARIABLE THICKNESS
Abstract
The stability of a rectangular plate of variable thickness, being in a supersonic flow of gas, was investigated by application of the linear piston theory. The critical velocity of the gas flow was calculated. The problem of thickness distribution optimization was solved.
Izvestiya MGTU MAMI. 2012;6(1):249-255
249-255
255-260
261-265
265-268
268-272
272-275
275-280
280-284
FORMATION OF THE MARKET FOR AUTOMOTIVE COMPONENTS AND STEPS NEEDED TO CREATE COMPETITIVE SUPPLIERS
Abstract
Issues of market formation and development of automotive components are extensive and require constant attention in order to find fundamental solutions. The article describes the main ways of forming the market for automotive components, measures needed to create competitive suppliers.
Izvestiya MGTU MAMI. 2012;6(1):284-293
284-293
INNOVATIONS OF RUSSIA IN GLOBALIZED ECONOMY
Abstract
Globalization today is one of the central topics for discussion, its positive and negative aspects are studied by most scientists. Russia's integration into the global economy requires constant development of its economic potential, a special role in this process is to create an innovative mechanism for the development of the economy.
Izvestiya MGTU MAMI. 2012;6(1):294-296
294-296
DEVELOPMENT OF REGIONAL ENGINEERING BY CLUSTERING
Abstract
Machine industry is a unique industry in Russia. Transition to innovative economy in the Russian Federation requires the combined efforts of government and business, taking into account specificity of each region. One of the most important areas of solving innovation economy problem is the creation of innovation clusters, realizing the competitive potential of the region.
Izvestiya MGTU MAMI. 2012;6(1):296-300
296-300
300-306
306-309
THE COMPETITIVENESS OF AUTOMOTIVE SERVICE BUSINESSES
Abstract
This article provides an analysis of some of the competitive advantages and key strategies for ensuring the competitiveness of automotive service businesses. In the competitive market enterprises use compromise solutions that combine the best options for policies that help to survive in the competition. Based on the ratings of the competitive profile of the enterprise is built on its core indicators. Comparison of the enterprise with indicators of key competitors, occupying part of the market close, qualitatively determines their market competitiveness.
Izvestiya MGTU MAMI. 2012;6(1):309-317
309-317
317-323
POTENTIAL FOR CLUSTER DEVELOPMENT CONTROL IN MOSCOW REGION
Abstract
The universal crisis of the late twentieth century exacerbated problems of a systemic crisis in Russia. It attracted attention of the scientific community to the special role of management in the formation of a new type of reproduction. For Russia, the question arose about the adaptation of international practice, considering the real situation in the country.
Izvestiya MGTU MAMI. 2012;6(1):324-329
324-329
NEW APPROACHES TO GOVERNANCE OF INNOVATION PROCESSES IN RUSSIAN ECONOMY
Abstract
The article examines applied organizational and economic mechanisms of state control of technical and technological progress, innovation in the making of a market economy in Russia. The authors presented the description of the unsolved problems of innovative development. Program strategy outlined the impact of government on the formation of innovative policy of the Russian economy.
Izvestiya MGTU MAMI. 2012;6(1):329-334
329-334
ANALYSIS OF EFFECTIVENESS OF INVESTMENTS IN MODERNIZATION OF PRODUCTION FACILITIES OF AN ENGINEERING COMPANY
Abstract
This paper presents an analysis of production of marketable products in various schemes of financial investments into the modernization of plant and equipment on the production: the use of the loan or lease for the renewal of basic production assets of the enterprise.
Izvestiya MGTU MAMI. 2012;6(1):334-339
334-339
340-345
MANAGEMENT TECHNOLOGY FOR DEVELOPMENT OF A SYSTEM FOR EVALUATION OF THE QUALITY OF EDUCATIONAL PROCESS AT UNIVERSITY
Abstract
The article considers the management technology for development of a system for evaluation of quality of educational process at university, which is implemented in logic: conceptualization, modeling, programming, design, implementation and reflection. Particular emphasis is placed on reviewing the results of evaluating of the quality of educational process.
Izvestiya MGTU MAMI. 2012;6(1):345-352
345-352
THE ROLE OF INDUSTRY TERMINOLOGY IN FORMATION OF PROFESSIONAL COMMUNICATIVE COMPETENCE OF A SPECIALIST
Abstract
In this article the concept of competence in higher vocational education is explained and the most important issues in the field of competence-based education are discussed. In particular, the problems of professional communicative competence in foreign language training of the students are analyzed.
Izvestiya MGTU MAMI. 2012;6(1):352-361
352-361
TYPOLOGICAL ANALYSIS APPLIED RESEARCH TALENT
Abstract
The article carries the typological analysis of modern applied psychological investigations of giftedness. The authors determine the controversial concepts of the phenomenon of giftedness and the regularities in its development. The main directions in practical work with the gifted are outlined. The notion of developmental environment was specified while dealing with the gifted.
Izvestiya MGTU MAMI. 2012;6(1):361-366
361-366
INDIVIDUAL STYLE OF PEDAGOGICAL ACTIVITY DURING TRAINING OF A COMPETITIVE ENGINEERING
Abstract
The article considers the question of training of a competitive engineer. Examined are the features of formation of students' necessary qualities. Individual style of activity of the teacher represents dynamic and constantly updated system of ways of the pedagogical activity, providing optimal interaction of a teacher and a student.
Izvestiya MGTU MAMI. 2012;6(1):366-369
366-369