Vol 2, No 1 (2008)
- Year: 2008
- Articles: 57
- URL: https://journals.eco-vector.com/2074-0530/issue/view/3811
Articles
Mathematical Model of Vehicle Motion as a Multimass System
Abstract
This article examines the problems which appear while compilation of multi-mass mathematical model of vehicle movement. The main principles of movement equations deriving and simultaneous equations for several masses solving features are listed. Authors introduce connecting elements for solving of simultaneous equations which allow managing without mathematical description of guiding suspension elements. Appendixes present equations ready for calculation.
Izvestiya MGTU MAMI. 2008;2(1):6-12
6-12
Parametric Unification of Automotive Design Factors on Development and Production
Abstract
The paper sets the method for design and production of automobiles of functional modules based on the transfer to unified assembly units. The method of functional modules detailed parameters unification considered. The article shows the problems which may arise while using functional modules. The methods for solution of these problems are offered.
Izvestiya MGTU MAMI. 2008;2(1):12-20
12-20
Vehicle Acceleration Data for Study of Dynamic Parameters
Abstract
This paper deals with the problem of the automobile acceleration data application to determine its dynamic parameters. Proposed are the method with using the motion differential equation and the method of inertial navigation. The article considers the possibility of both method application for a study of tyre parameters, road surfaces as well as the problems of automobile standardization and certification.
Izvestiya MGTU MAMI. 2008;2(1):20-25
20-25
Onboard Electrical Systems with Limited Power of Primary Source
Abstract
The new system of auto electrical equipment (AEE) to an on-board electrical system connection is presented in order to eliminate defects of the modern AEE particularly at the moment of engine starting. Each AEE system is connected by its own electrical supplying system representing a voltage connecter. Such system allows output voltage of every electrical supplying system to be easy regulated depending on outside factors, engine behavior and the AEE system itself. The article describes a new design procedure and its advantages.
Izvestiya MGTU MAMI. 2008;2(1):25-27
25-27
Designing and Calculation Methods of Microintegrated Control System of Engines
Abstract
This article describes the mechanism of control signal formation in the microprocessor control systems of air-fuel mixture dosing and ignition processes. The authors present the methods of fuel supply and ignition system parameter calculation that are the basis of microprocessor control system designing in modern engines with compulsory ignition.
Izvestiya MGTU MAMI. 2008;2(1):27-33
27-33
34-39
39-45
45-53
Research of the Punch Interaction with Composite Protective Panel
Abstract
The work examines the structure of a protection composite panel consisting of a crushing layer (ceramic discrete elements of a cylindrical shape) and a restraining layer below (metallic leaf). This protection panel can be used for an armour-piercing bullet protection of the car. Here is the strength calculation of ceramic elements and metallic protective layer dynamic interaction under bullet impact. The problem was solved under a variety of protection panel parameters in order to define their proper values.
Izvestiya MGTU MAMI. 2008;2(1):53-56
53-56
56-62
Energy Accumulating Material Application as an Alternate Fuel for Gas-turbine Installations
Abstract
This article deals with the possibility of energy accumulative matters (EAM) usage as an alternative fuel for gas-turbine engines and plants. Ternary alloys of Si, Al and Fe are examined as industrial EAM. Combustion heat and adiabatic temperatures of EAM burning are estimated in superheated steam at variable oxidizer ratios. The composition of condensed combustion product is estimated at variable fractional composition of EAM.
Izvestiya MGTU MAMI. 2008;2(1):62-66
62-66
Vehicle Longitudinal Motion Simulation by Analytical Automatic Machines
Abstract
In work examines an aspect of the human-machine system "Automobile-Environment-Driver" model construction, associated with a description of the vehicle longitudinal motion control systems of, allowing to reproduce controlled automobile motion under normalized conditions with various functionals of qualities.
Izvestiya MGTU MAMI. 2008;2(1):66-72
66-72
72-79
Valve Traction Motors in Vehicle Electric Drive
Abstract
A valve traction motor (VTM) is a contactless analogue of a DC traction motor (there is a mechanical collector-brush contact). The VTM with permanent magnet excitation has supplementary advantages: reliable exitation and its loss absence, the possibility of working with 1 or less zero coefficient of power.
Izvestiya MGTU MAMI. 2008;2(1):79-82
79-82
83-91
Evaluation of the Destructive Effect of an All-wheel Drive Vehicle to the Ground
Abstract
The article analyzes works, devotes to wheel influence on ground. Existing techniques do not consider slipping wheels and cannot estimate design of a car. The authors propose a parameter considering basic destroying factors (compaction and shifting of ground). The parameter considers increase of the total interaction area of a wheel with ground under curvilinear motion of a car. The analysis shows basic design vehicle features influence on track formation and calculation of harmful impact to a soil value under curvilinear car motion. Calculations show that the maximum harmful impact is observed under partial track overlapping.
Izvestiya MGTU MAMI. 2008;2(1):91-96
91-96
96-100
Experience of building and testing a vehicle with a hydrostatic transmission
Abstract
Hydrostatic transmission of a cross-country vehicle has such advantages, as remotability and stepless transfer of capacity, large power regulation range, ease of control. The article examines the formulas for unit selection and calculation of hydrostatic transmission systems; tells the history of an experimental 6-wheel drive vehicle "Gidrohod"-49061. Test results prove a correct choice of technical and design decisions.
Izvestiya MGTU MAMI. 2008;2(1):100-106
100-106
An Algorithm for Calculating of Complex Systems on the Bulk Hydraulic Transient Mode
Abstract
The article is dedicated to the description of calculation algorithm for hydraulic drives of any configuration. The solution is received in the form of transient process of key parameters of drive: pressure, consumption, velocities, loads, etc. There are mentioned some differential equations for primary elements of hydrostatic drive system, the fundamentals for building of a computer program, which enable to modify it.
Izvestiya MGTU MAMI. 2008;2(1):106-114
106-114
3D Model of Transfer of Pollutions from Motor Vehicles to the Air
Abstract
The article states the main ideas of mathematical simulation of pollution distribution from motor transport in the city atmosphere. Emission estimation model is based on solution of dual problems. A 3D model of advection-diffusion is shown. All models are paralleled on memory distribution system using domain decomposition method.
Izvestiya MGTU MAMI. 2008;2(1):114-118
114-118
Method of Building of Traction-speed and Fuel-economic Characteristics of a Car with Two-stream Hydromechanical Transmission Voith
Abstract
The article proposes a design procedure of traction-speed and fuel-economic properties of an automobile with two-line hydromechanical "VOITH" transmission, and comparative analysis of two-line and one-line hydro mechanical transmissions carried out. The developed technique allows to solve a number of questions, appearing under various operation conditions of an automobile.
Izvestiya MGTU MAMI. 2008;2(1):118-123
118-123
Installation for Belt Transmission Testing
Abstract
Installations enabling experiments at modern level were required for perfection of the theory of V-belt transmissions and designing recommendations. The article considers features of experimental installation of Machine Parts and Elevating Transport Mechanisms Department of the Moscow State Technical University MAMI where modern demands are considered, particularly raise of accuracy of measured parameters, transmission type, a direct numerical control and machining of experimental data.
Izvestiya MGTU MAMI. 2008;2(1):123-127
123-127
Propulsion of Logging Machines with Individual Electromechanical Wheel Drives of Rolling Over Type
Abstract
The article examines the possibility of a rolling propulsion device with an individual electric drive on forest chopping machines. The mathematical model of the propulsion operation on soils with little bearing capacity is designed and efficiency comparison is conducted depending on power consumption for the bearing area formation.
Izvestiya MGTU MAMI. 2008;2(1):127-133
127-133
Analysis of the Inertia Influence on the Average Speed of a Tracked Vehicle
Abstract
This article concerns the comparative analysis of vehicle control system with concrete examples implemented by up-to-date microprocessors; a concise description of concerned control system operation is also presented. The work examines positive and negative features of various control system usage with regard to caterpillar chassis, and feasibility of onboard management-information system with different control system types.
Izvestiya MGTU MAMI. 2008;2(1):133-136
133-136
The Mobility of High-speed and Special Traction Machines equipped with hydrostatic transmission
Abstract
This paper examines mobility of track-type and special traction vehicles equipped with hydrostatic drive. The hydrostatic drive in a full flow powertrain considerably increases loading of a special traction vehicle engine (tractors, self-propelled combines, excavators) and therefore increases efficiency. The hydrostatic drive in double-flow powertrains and rotation mechanisms functions as a stepless rotation mechanism smoothly varying turning radius from infinity to a minimum value at a selected gear. The three examined variants of hydrostatic drive output control confirm power ant torque characteristic hardness.
Izvestiya MGTU MAMI. 2008;2(1):137-154
137-154
155-158
Long-term Strength of Emitter Shells of Thermionic Energy Converters of Heat-resistant Alloy of Molybdenum in a Vacuum or in Cesium Vapor
Abstract
This paper presents an experimental investigations of influence of temperature and time on the structure and properties of molybdenum strengthened by dispersion particles. These experiments allowed ascertaining regularities of disability of structure and properties dispersion-strengthened molybdenum.
Izvestiya MGTU MAMI. 2008;2(1):158-161
158-161
Features of Forming Disks of Gas Turbine Engines of Heat-Resistant Nickel Alloys with a Physical Model of Liquid-Phase Sintering of Pellets
Abstract
The paper outlines the test results for technology which enables to manufacture the prototype jet engine disks out of powder nickel-based alloy EP741NP using a liquid phase sintering, hot isostatic pressing and plastic deforming. The results are based upon the liquid phase sintering model for powder materials. The obtained test results make it possible to manufacture the isothermal rolled disk.
Izvestiya MGTU MAMI. 2008;2(1):161-163
161-163
Production of Disc Blanks GTDP on the Automated Line ALRD-800
Abstract
The proposed work presents an outline of the jet engine disk isothermal rolling and the necessary equipment. The features of the disk rolling machine control system are reviewed. The paper also describes the capability of titanium and nickel perform rolling, including powder nickel-based alloy ЭП741НП.
Izvestiya MGTU MAMI. 2008;2(1):164-166
164-166
Computer Retrofitting of Measurement and Control as an Element of Information Technology
Abstract
This paper presents the results of different nature surfaces fractal analysis, which enables to reveal the roughness of the submicro- and nano levels, inaccessible for the traditional methods of researching. Due to the retrofitting procedures, including the computer processing of the fractal signatures, the additional information on its condition was obtained. It enables to enhance the reliability of results and to widen it's range to the submicro- and nano- levels.
Izvestiya MGTU MAMI. 2008;2(1):166-169
166-169
Creation of Technological Systems Operational Training of New Production Technology Based on Modern Means of Rapid Prototyping
Abstract
The paper presents an analytical, theoretical and experimental research on using of Rapid Prototyping-RP methods enabling to speed-up the preproduction of samples and small series of casting blocks. Optimal ways of using RP methods for concrete foundry technologies were determined. Finally, this paper presents the technical specifications for development of the Compact intellectual production system for moulding solutions.
Izvestiya MGTU MAMI. 2008;2(1):169-175
169-175
175-178
Design and Modeling of the Multispeed Gear Drive of Machines
Abstract
The paper examines a bundled software which enables to perform a structural design of polyspeed gear-drive of metal-cutting machine with drive simulation using EULER. The functional capabilities of the software are illustrated by concrete examples.
Izvestiya MGTU MAMI. 2008;2(1):178-181
178-181
The Influence of Carbon on the Properties of Cast Steels with 3% Chromium
Abstract
This paper considers the effect of carbon on the hardening temperature and cast steel drawing for the hot working die steel of the following structure : 0,23-0,59%С and 3%Cr. The optimal temperature of hardening and drawing are defined. Finally, the paper studies the effect of carbon on the cast steel mechanical properties.
Izvestiya MGTU MAMI. 2008;2(1):181-183
181-183
Analysis of Mechanics of the Process of Cutting Hardened Material. Chip formation
Abstract
The works states results of the chip formation mechanics analysis, which considered as a combination of two continuously going actions: chip formation and plastic forming of a subsurface layer; the deformed material is considered as a mechanical system with several degrees of freedom. Proposed is a common velocity vector diagram for chip formation with forming of a subsurface layer, obtained are physical equations for the forecast of chip escape velocity and deformation, pressure and force on tool surface with angled major cutting edge.
Izvestiya MGTU MAMI. 2008;2(1):183-190
183-190
The Theory of Fractals as an Effective Tool for Solving Applied (engineering) Problems
Abstract
Creation of surfaces with specific properties necessary for stable product operation is an urgent need for the surface quality management of such products. Surface roughness influences joint surface performance, also influences fatigue durability and connection tightness, and in motionless connections durability depends on size of part roughness. Fractal analysis allows to estimate surface roughness irrespective of the form of its elements and distribution density that would give universality for estimation.
Izvestiya MGTU MAMI. 2008;2(1):191-193
191-193
Concepts of Filter Cleaning Mechanism from the position of the demonstration of short-and long-range contaminant capture forces
Abstract
The work examines mechanism of filtration process extended on basis of forces classification under filtration as short-range and long-range. The article shows, that the well-known sedimentation-loss conception which corresponds to the field of short-range forces is limited. Basic positions of a new accumulation-disconnection conception correspond to the field of long-range forces, for example magnetic forces.
Izvestiya MGTU MAMI. 2008;2(1):193-198
193-198
The Characteristic Sizes of Ferromagnetic Impurity Working Environments (for raw data histograms)
Abstract
The dispersed composition of ferro-admixtures in foodstuffs is studied. An ordinary histogram is transformed into a modified histogram showing the portion of particles in total volume (mass, concentration). It enables identifying of particle predominant sizes.
Izvestiya MGTU MAMI. 2008;2(1):198-200
198-200
Modification of the Engine Valve Cover Design through the Use of Adhesive Joints
Abstract
To decrease the vibration and noise level we produced some changes in the design of valve cover of ZIL engine through manufacturing it out of two steel sheets joined by noise-absorbent material. Also we conducted the series of experiments for definition of deformation features of glue junction depending on shift deformation of material and speed of deformation.
Izvestiya MGTU MAMI. 2008;2(1):201-206
201-206
Study of the Jacketing with Sheet Material Stretching
Abstract
This paper presents a computational and experimental investigation of covering with stretching of a sheet material. The study determines the deformation features of forming subject geometry of the tool, conditions of contact interaction and thickness of material. Finally, it is determined the great influence of friction on ultimate strain of the sample and its localization at destruction phase.
Izvestiya MGTU MAMI. 2008;2(1):206-212
206-212
Experience in the Creation and Implementation of complex industry vacuum systems (based on devices and component parts eliminating movement friction and designed to work in the field of micro-and nano-electronics and other high-tech)
Abstract
The article is devoted to creation of executive and switch complexes of vacuum technological equipment and contains the review of both the most widespread and the most prospective devices based on the principle of controlled elastic deformation.
Izvestiya MGTU MAMI. 2008;2(1):212-229
212-229
Ultrasound Sudies of Ball Elements of Bearing Assemblies
Abstract
The work is about researches of elastic wave distribution in a chain of steel balls. An occurrence of high-frequency oscillation is revealed while elastic wave increases and strong nonlinearity in underpressure phase is observed. Experimental results match the Hertz theory of contact interaction.
Izvestiya MGTU MAMI. 2008;2(1):230-233
230-233
Influence of Axisymmetric Initial Imperfections of a Spherical Shell on its Critical Load
Abstract
The work examines pre- and postbuckling behavior of a thin, elastic and shallow dome, which is clamped at own boundary and is under uniform external pressure. It is supposed, that before pressure application the dome has small axisymmetric initial imperfections. Solving of this boundary problem is based on Marguerre's equations and obtained by means Rayleigh-Ritz method and arch-length incremental method. Search of different forms of initial imperfections of a dome from spherical at the maximal deviation up to 30% of its thickness enables receiving of a range of its critical loadings which completely comprised all experimental values.
Izvestiya MGTU MAMI. 2008;2(1):233-246
233-246
Trimming of Curved Surfaces in Computer-aided Design
Abstract
The work examines methods of free-form surfaces limitation by arbitrary contour in CAD/CAM systems. Algorithms of surfaces contour trimming in automatic and automated modes are described. The article represents results of the algorithm realization in CAD/CAM system SPOP-3.
Izvestiya MGTU MAMI. 2008;2(1):246-249
246-249
The Methodological Role of Categories of Chance, Necessity and Possibility of Scientific Knowledge
Abstract
The paper outlines the basic philosophical categories by means of which the demands to special sciences in the field of logic and methodology of science are made. Application of methodological devices of reception of concrete results and the description of used methods are shown.
Izvestiya MGTU MAMI. 2008;2(1):250-254
250-254
Russian Economy: Neo-liberals and Their Critics
Abstract
The Russian liberal economic thought has been shaped long ago and it has already approached it's bicentennial. Three periods in its development can be emphasized: 1) before the Great October Revolution; 2) during the period of formation and development of the state socialism in the USSR; 3) after the August Revolution of 1991.
Izvestiya MGTU MAMI. 2008;2(1):254-261
254-261
Industrial policy: formation and development directions
Abstract
In Russia there is necessity to provide an annual average growth rate not lower than 6-7%. Only high rates can guarantee the growth of national economy, and that must be the starting point of industrial policy. The paper proves that the support for energy resources is not efficient. The article describes the transition for innovation method of development and practice of various methods of management by means of it's implementation.
Izvestiya MGTU MAMI. 2008;2(1):261-270
261-270
The Economic Justification of the Process of Restructuring of Industrial Enterprises
Abstract
The development of competitive qualities of industrial enterprises appears to be crucial factor in the era of the globalization of economical processes. In this context the article deals with the discussion of the mechanism of economical substantiation of industrial enterprises reorganization; it also determines the list of conditions required for enterprises reorganization to raise them to a competitive level.
Izvestiya MGTU MAMI. 2008;2(1):270-277
270-277
Influence of the Aggregate Demand on the Investment Formation through Internal Resources of Economic Units
Abstract
The study shows the results of theoretical research of influence of a consumer demand on a financial condition of the industrial enterprises. The research was carried out with use of the mathematical description "incomes - consumption". Results can be used for making of administrative decisions concerning investment of economic objects.
Izvestiya MGTU MAMI. 2008;2(1):277-283
277-283
Analysis of Related Parties
Abstract
In this article we consider the questions of preparation of information about the affiliated persons for financial reports, the order of reference of physical and legal persons to parties connected to a company and basic operations with affiliated persons. We also show the practical importance of such information for the analysis of financial position of a company and the forecasting of its development.
Izvestiya MGTU MAMI. 2008;2(1):283-286
283-286
Development of the Concept of New Word in the History of Russian Language
Abstract
The article is devoted to one of the most active processes occurring in Russian lexicon at the present stage, - to occurrence of new words. The central problem is a changing representation that represents «a new word». The author analyzes, as there was a transformation of sights of researchers on the nature, the essence, criteria of allocation of new words, marks complexity this phenomenon, emphasizes necessity of its further multilateral studying.
Izvestiya MGTU MAMI. 2008;2(1):287-290
287-290
Use of Modern Information and Communication Technologies in the Practice of Teaching the Russian language and culture of speech Subject
Abstract
The paper is devoted to the problems of use of modern information and communicative technologies in practice of teaching of discipline "Russian and a standard of speech" in the higher school. The basic aspects of use of advanced Internet-technologies in a combination to new communicative techniques of training are analyzed.
Izvestiya MGTU MAMI. 2008;2(1):291-296
291-296
Nano-boom and the University
Abstract
The necessity of acquaintance with bases of nanotechnology and its potential opportunities of all students of technical high schools irrespective of their future specialty is proved. In conditions of complete absence of financing the free of charge attempt is undertaken to realize semicentennial experience of active work in area of nanotechnology in creation of introduction lecture on nanotechnology. In the lecture the reasons of outstanding properties of substance in nanosizes range are explained. The ways of creation of nanocomposites with high world level properties are offered. The examples of practical use of nanocomposites in modern engineering are given.
Izvestiya MGTU MAMI. 2008;2(1):296-300
296-300
Improving of Normative Document Study on the Basis of Improving the Methodological Support of Diploma Projects
Abstract
Modern engineer has to get knowledge and skills in use of standard documents for fulfilment his own functional duties. Different methods of study of normal documents in technical university have been examined. We identify the important role of diploma designing to set skills in standard documents usage. We have proved the necessity of creation of organization standard Graduate qualification work. Structure and rules of fulfillment, principles of its formation are given.
Izvestiya MGTU MAMI. 2008;2(1):300-303
300-303
Problems in Constructing a Theoretical Sport Biomechanics and Modeling of Jumps in Figure Skating
Abstract
Construction of theoretical sports biomechanics by one-man efforts causes complications. It requires sportsmanship knowledge, anthropomorphous mechanism (AM) modeling skills, AM motion modeling by differential equations, a computer numerical analyze of differential equations. Construction of a fundamental theory is a work of various specialists. The article proposes an algorithm of approximate sports biomechanics theory construction by an example of multiturn jump performance in singles figure skating.
Izvestiya MGTU MAMI. 2008;2(1):304-307
304-307
Theoretical and Applied Problems of Study of Psycho-pedagogical Support of Development of Gifted Students in Higher Technical School
Abstract
The article studies a very important problem for new educational situation in Russia. On the basis of achievements of the psycho-pedagogical techniques and educational practice the authors determine the aspects of influence, produced by enriching educational environment (EEE), on talanted students, which can be useful in teaching practice and development in technical institution. The main influence in this aspect is made through training, trainer and trainee being the main participants of the educational process in higher technical school.
Izvestiya MGTU MAMI. 2008;2(1):307-313
307-313
The Problem of Teaching Language Courses in Technical Colleges
Abstract
The paper studies the problems of philological disciplines teaching in technical institutes. Not so long ago Russian was considered as one of the leading world languages, but recently the situation has changed. The author gives her opinion on teaching non-philologists of humanities and implementation of culturological approach in technical university.
Izvestiya MGTU MAMI. 2008;2(1):313-315
313-315