Vol 6, No 2-1 (2012)
- Year: 2012
- Articles: 62
- URL: https://journals.eco-vector.com/2074-0530/issue/view/3764
Articles
9-12
Mathematical description and optimization of performance of transmission and brake control in problems of optimal vehicle engineering
Abstract
The article provides a summary of performance of vehicle transmission and brake control for formulating and solving multiobjective parametric problems with adjustable design parameters. Characteristics for regulation of design parameters of transmission and brake control of class “B” passenger car are determined based on the road microprofile.
Izvestiya MGTU MAMI. 2012;6(2-1):13-19
13-19
19-23
23-29
29-38
Prospects medium-tonnage urban commercial vehicles with hybrid power plant with Russian-made tractive electrical equipment
Abstract
The article describes the prospects of development of medium cargo urban vehicles with combined power plants using components manufactured in Russia. It also describes advantages and disadvantages of the chosen layout of powertrain. The authors justify the necessity of application of test benches for experimental studies.
Izvestiya MGTU MAMI. 2012;6(2-1):38-46
38-46
46-55
Modeling of the device for balancing of a Li-Ion battery with switched capacitors for electric vehicles
Abstract
The article describes the principle and method of constructing a simulation circuit of balancing devices with switched capacitors for Li-Ion battery in Matlab Simulink program. Conclusions are drawn about the possibility of balancing device with a battery of an electric vehicle.
Izvestiya MGTU MAMI. 2012;6(2-1):55-61
55-61
Approximate method for calculating of internal combustion engine intake noise
Abstract
In article the approached method of calculation of noise of admission ICE, based on dependences between noise level and parameters of a stream of air in an inlet branch pipe of the engine which are received by numerical calculations is considered. Errors of the offered method are resulted.
Izvestiya MGTU MAMI. 2012;6(2-1):61-64
61-64
Methods of selecting the rational combination of materials for sandwich panels of a bus body
Abstract
The article contain main principles and formulas which allow to predict possible weight or price benefits of introduction of new materials in sandwich panel structure used as floor or roof of self-carrying bus body during early steps of structure development. Weight, mechanical and price properties of materials and discrete row of sheet thicknesses are taken into account.
Izvestiya MGTU MAMI. 2012;6(2-1):64-72
64-72
Kinetostatical analysis of a lifting mechanism
Abstract
This article considers the developed vector-matrix method for determining of driving forces and reaction forces in kinematic pairs of multilever linkage with adjustable closed circuit, which allows obtaining of analytical expressions of desired parameters in an explicit form. As a result of the kinetostatical analysis of lifting mechanism there are received recommendations for selection of a hydraulic cylinder.
Izvestiya MGTU MAMI. 2012;6(2-1):72-78
72-78
Complex automation of petrol stations
Abstract
The article describes the existing automation of petrol stations, it points to major drawbacks of existing systems. The authors offer an option of complex automation of petrol stations with introduction of the system at gas stations “Gazpromneft-center”.
Izvestiya MGTU MAMI. 2012;6(2-1):78-84
78-84
Piecewise continuous regulation of a tractor speed
Abstract
The paper presents a method of piecewise continuous regulation of tractor speed, based on using rational choice of a rather small range of correction characteristic of a diesel engine, where power does not decrease below nominal, and the fuel efficiency is improved by reducing of engine speed.
Izvestiya MGTU MAMI. 2012;6(2-1):84-89
84-89
Forecasting of operating temperature of pneumatic tires of rock handler trucks
Abstract
The paper considers influence of tire tread temperature on durability of rock handler truck tires. The authors present the results of research of tire heating nature during operation. By the statistical treatment of experimental data the regression models of the multifactor processes are obtained.
Izvestiya MGTU MAMI. 2012;6(2-1):89-92
89-92
Numerical and experimental investigation of braking performance of a bus
Abstract
The article contains results of studies of PAZ bus brake performance. For this research there are approaches used during road tests and for computer modeling, simulating the conditions of a real test. The authors give a comparative analysis of the results obtained during simulation of braking process and in road tests of the bus.
Izvestiya MGTU MAMI. 2012;6(2-1):92-97
92-97
Analysis of the design of the automotive generator of reciprocating type
Abstract
This article considers an automobile generator of reciprocating motion type with a free piston, which is an integral unit converting mechanical energy of the reciprocating motion of engine pistons into electrical energy for use as an on-board power supply of hybrid vehicles. The authors examine advantages of this method of converting of thermal energy into electrical energy and design issues. The papers formulates the requirements to the linear electric generator with a free piston. It also includes a brief review of linear generator developments.
Izvestiya MGTU MAMI. 2012;6(2-1):97-104
97-104
Analysis of the workflow of linear generator of reciprocating motion type
Abstract
This article considers the integrated propulsion system, consisting of internal combustion engine with a free piston and linear electrical inductor machine with permanent magnet on the stator. The authors investigate the regenerative mode of the linear inductor machine operation and compare two systems of permanent magnets layout. There are data presenting calculation of linear electric machine performance.
Izvestiya MGTU MAMI. 2012;6(2-1):104-110
104-110
110-118
119-126
126-132
133-143
143-148
Turbo-electric compressor: potential, design and prospects
Abstract
The paper describes a turbo system based on a hybrid turbocharger, its advantages over a conventional turbocharger, design, performance, operating principles. The description of a control system of the turbo-electric compressor is also given in the article.
Izvestiya MGTU MAMI. 2012;6(2-1):149-153
149-153
153-160
Application of active wheel modules in articulated trucks for transportation of oversized and heavy cargo
Abstract
The paper presents the design of various types of active-terrain trucks. The authors provide technical solutions and methods for linking of trains by active wheel modules with hydrostatic wheel drive. The article also contains the analysis of the traction capabilities and an estimate of the damaging effects of trucks on the ground with the active and inactive trailing links.
Izvestiya MGTU MAMI. 2012;6(2-1):160-168
160-168
Investigation of the heat transfer process in a mesh matrix of a rotary heat exchanger
Abstract
The paper presents the results of computational modeling of thermal processes in mesh matrixes of rotary frame heat exchangers. The authors received the refined dependence of the mesh matrix heat transfer of the coolant flow characteristics.
Izvestiya MGTU MAMI. 2012;6(2-1):168-173
168-173
Investigation of combustion modes of energy-accumulating materials
Abstract
The paper considers a model of combustion powdered energy-accumulating substances (EAS) in a cylindrical combustion chamber. This camera can be considered as a prechamber of the hydrogen reactor for transport and stationary power plants based on gas turbine engines. For calculations of combustion of powdered EAS in the flow of superheated steam a program is developed. Distribution of the temperature in the chamber axis at different values of the coefficient of oxidant excess (water vapor). The authors determined the size of the depth of the flame front at the given conditions of the combustion chamber with energy-accumulating substances.
Izvestiya MGTU MAMI. 2012;6(2-1):173-178
173-178
Microturbine with efficiency of over 43%
Abstract
The paper considers the results of mathematical modeling of strain state of a non-uniformly heated ceramic frame of rotary heat exchanger of multi-purpose gas turbine engine with the power of 300 kW . Received a conclusion that the implementation of frame heat exchanger made from ceramics will enable the design of the rotary heat exchanger with high degree of regeneration (95-97%), without increasing the amount of air leaks through the seals of the heat exchanger.
Izvestiya MGTU MAMI. 2012;6(2-1):179-182
179-182
The comparative evalution of the vibration damping characteristics of materials for modification of an oil pan and valve covers of an engine
Abstract
The results of experiments by vibratory response of plate elements of five different materials with different dimensions and boundary conditions are given in the article. The effects of vibration-absorbing and composite materials on vibratory properties are considered. The major attention has given to the changing of frequency spectrum of vibrations and damping coefficient. The comparatives diagrams of damping coefficient are given. Conclusions and recommendations are made.
Izvestiya MGTU MAMI. 2012;6(2-1):182-189
182-189
Development of a mathematical model of an energy-absorbing seat, using the results of piling tests
Abstract
The paper presents the results of nature piling tests simulating mine explosion of armored vehicles. The tests were conducted to evaluate the effectiveness of anti-mine energy-absorbing seats. During testing by measuring the dynamic parameters in the design of the seat and the man modeled by anthropomorphic dummies "Hybrid 2" and "Scythian". The test results allowed to create a mathematical model of anti-mine seats and to make a comparative analysis of numerical and experimental data.
Izvestiya MGTU MAMI. 2012;6(2-1):189-194
189-194
Evaluation of explosive impact of mines on structures and crews of armored vehicles. Damaging Effects. Methods of protection
Abstract
This paper considers mechanism of explosive mine impact on the armored vehicles and crews. The authors presented integral estimations of explosion, allowing to carry out calculations for dynamics and strength of the undercarriage, and the criteria for assessing the risk of injury of crew members. There is an analysis of possible ways to improve the design of mine resistance of armored vehicles.
Izvestiya MGTU MAMI. 2012;6(2-1):194-205
194-205
Numerical and experimental stufy of composite ceramic armor resistance when exposed to high-speed bullets and fragments
Abstract
+7(495)223-05-23 ext. 1507, kulakov@mami.ru The article presents the results of calculation and experimental study of a composite ceramic armor resistance when exposed to high-speed bullets and fragments. Based on the analysis of the experiments the authors refined a finite-element model, which allowed to make multiple calculations of various structural designs of armor in order to choose the most rational. Authors show influence of geometrical parameters of a ceramic element on the strength of armor.
Izvestiya MGTU MAMI. 2012;6(2-1):206-213
206-213
Optimal control theory solutions for investigation of a hybrid electric vehicle’s powertrain
Abstract
The paper gives a theoretical background of the development a control strategy for a hybrid electric vehicle (HEV). Properties of a HEV that define its fuel economy and pollutant emissions are briefly described. Analysis of energy flows in a HEV’s powertrain is carried out. Based on this analysis a way to optimize energy flows is proposed. Said way implies a method of optimal control theory, namely dynamic programming, to be utilized. HEV’s model implemented in a DP-based routine is presented. Some theoretical background about DP is given as well. The most interesting results of DP-investigations are presented in the next section. The last section of the paper contains some conclusion remarks.
Izvestiya MGTU MAMI. 2012;6(2-1):213-222
213-222
222-228
Comparative analysis of series and combined options of control of a hydrostatic transmission of all-wheel drive wheeled vehicle
Abstract
In the article there are presented the results of research of the developed mathematical model of linear motion of all-wheel drive three-axle vehicle with individually controlled hydrostatic drive of its driving wheels which allow to justify the need of usage of series option of control in the system of automatic adaptive control of hydrostatic transmission.
Izvestiya MGTU MAMI. 2012;6(2-1):228-233
228-233
Analytical method of estimating the results of interaction of elastic wheel with deformable bearing surface in the sustained straight rolling motion
Abstract
Suggested by the authors mathematical model was obtained on the basis of a combination of known relationships that govern the interaction of elastic wheel with non-deformable bearing surface, with recommendations for taking into account of additional forces in the area of ground deformation by a wheel. Mathematical model allows to define the longitudinal component of the force that is transferred to the machine frame and, at the same time, the moment occurring on the axis of the wheel using vertical load on the wheel axle, the longitudinal velocity of the axis and the longitudinal slip in the contact area.
Izvestiya MGTU MAMI. 2012;6(2-1):233-241
233-241
The fuel pump of a new generation
Abstract
Bekaev@list.ru Based on the electrohydraulic effect, also known as the “Yutkin effect”, the authors developed a brand new design of an electro-hydraulic fuel pump of high pressure, providing performance superior (for pressure and flow rate) than modern high pressure fuel pumps of internal combustion engines. Application of the developed electro-hydraulic pump for internal combustion engines will completely eliminate the use of a mechanized actuator, an integral part of modern fuel pumps, and thus greatly simplify the design and operation of fuel system, reduce its metal content, cost and noise.
Izvestiya MGTU MAMI. 2012;6(2-1):241-245
241-245
245-249
250-255
255-260
Information and energy converters for control systems
Abstract
The paper considers the information and energy converters from the standpoint of engineering systems. A set of elements is transformed into the system due to the exchange of information between the elements, therefore the quality of any system is defined by the processes of information transfer in its elements and the system as a whole. The paper also considers kinetics of information processes and its influence on quality management systems.
Izvestiya MGTU MAMI. 2012;6(2-1):260-269
260-269
269-279
Engineering method of calculation of gasdynamic foil bearings of turbocompressors
Abstract
In this article the engineering method of calculation of gasdynamic foil bearings is considered. Calculations according to this method were made and comparison with the experimental results, obtained by other authors, was done. Ranges of application are also considered.
Izvestiya MGTU MAMI. 2012;6(2-1):279-286
279-286
Strength analysis of the frame of the unit for long loads when modifying the geometry of its elements
Abstract
The paper considers the problem of strength analysis of advanced vehicle frame for transporting of long loads. There are offered the measures of modifying of the frame construction. With offered alternatives of improvements there were built mathematical model and defined values of the stresses and deflections in the frame of the unit for all cases considered.
Izvestiya MGTU MAMI. 2012;6(2-1):286-293
286-293
Universal test bench for elastic behavior control of pressure plate of a ready-assemble clutch
Abstract
In the process of automotive components approbation it is necessary to use test bench equipment which allows to evaluate characteristics of components for compliance with the documentation requirements. In the article there is presented a test bench allowing to take measurements of elastic characteristics of the clutch pressure disk.
Izvestiya MGTU MAMI. 2012;6(2-1):293-296
293-296
Unified control algorithm for torques delivered to wheels of all-wheel-drive vehicles
Abstract
This paper proposes the unified control algorithm for torques delivered to wheels of all-wheel-drive vehicles with “intellectual” transmission. The algorithm provides the determination of torques delivered to each wheel of multi-axis vehicle with minimal loss of power regarding to road conditions: solid surface or deformable ground. Results of calculations were confirmed by experimental research.
Izvestiya MGTU MAMI. 2012;6(2-1):297-303
297-303
Methods of acquisition and spectral analysis of vibration characteristics of artificial tracks
Abstract
The article describes the results of the calculations of kinematic excitation characteristics from the profiles of artificial tracks, which should be applied when assessing the machinery vibration standards compliance. The authors presented the basic properties and selected the most representative tracks for calculation and nature experiments to improve the systems of vibration protection.
Izvestiya MGTU MAMI. 2012;6(2-1):303-310
303-310
Analysis of the characteristics of external combustion heat engine by computer simulation
Abstract
The article is about the mathematical model, which is used for development of a computer model of the heat engine with external combustion. Computer simulation allowed to establish main principles of heat engine operation and make the analysis of the impact of changes on its characteristics and develop variant of the engine design.
Izvestiya MGTU MAMI. 2012;6(2-1):311-318
311-318
Kinematic and force analysis of universal multiple differential mechanism of automatic gearboxes
Abstract
In the article there are presented structural and kinematic schemes and the design of the module of automatic gearboxes on the basis of universal multiple differential mechanism, designed by the authors. There is also considered the method of kinematic and force analysis.
Izvestiya MGTU MAMI. 2012;6(2-1):318-328
318-328
Theoretical analysis of plane motion of rolling wheel when forming of contact area
Abstract
There is considered the plane motion of rolling wheel in conjunction with geometric and power relations of forming of contact area. There is established that the transformation of the connection is accompanied by mutual deformation of contacting surfaces with arising of friction forces, caused by the repacking of soil particles and other factors. There is defined the energy state of the “wheel-contact patch” system and its general characteristics of movement.
Izvestiya MGTU MAMI. 2012;6(2-1):328-334
328-334
Analysis of forming of contact area by rear wheel-drive 4x2 wheel chassis with elastic circuit of power flow input
Abstract
There is considered the process of forming of contact area by 4x2 wheel chassis with elastic circuit of power flow input. There was developed the method of calculating of tractive characteristics, amplitude-frequency and phase-frequency characteristics of motion of the “wheel-contact area” system. There was got the transfer function establishing a connection between input and output parameters, allowing to design measuring and information vehicle onboard system with determination of its parameters (motion parameter dead-band of measurement system, ranges of measurements and characteristics of sensors, devices, etc.).
Izvestiya MGTU MAMI. 2012;6(2-1):334-339
334-339
Use of electrohydrodynamic engine on vehicles
Abstract
The article is dedicated to electrohydrodynamic engine working without hydrocarbon fuel. Engine operation is based on the electric discharge in the nonfreezing liquid located under piston volume of the cylinder. According to calculations, engine efficiency can reach 68 - 72 %.
Izvestiya MGTU MAMI. 2012;6(2-1):339-348
339-348
The form of contact of deformable elastic wheel and soil and the calculation of the track depth
Abstract
This paper examines the impact of design form of contact between elastic wheel and deformable soil on a track depth. There are solved the problems of the adequacy of adopted theoretical models, there are indicated the estimated equations and graphs.
Izvestiya MGTU MAMI. 2012;6(2-1):348-355
348-355
355-360
Analysis of constructions providing the maximum thermodynamic effectiveness of reciprocating engines
Abstract
In the article there is carried out the analysis of various concepts of gasoline internal combustion engines with prolonged expansion of reaction mass used for improving economic and environmental factors. There is considered classic concept of Atkinson cycle, Otto-Atkinson and Atkinson-Miller schemes and also discussed measures to improve the combustion process.
Izvestiya MGTU MAMI. 2012;6(2-1):360-367
360-367
Test bench for evaluation of the strength characteristics of elements of wheels
Abstract
The paper presents the design and principle of operation of a test bench for evaluation of the strength characteristics of elements of an automobile wheel. The advantage of the test bench is the ability of independent application of radial and axial forces which gives the ability to research the influence of each of them separately on a strain-stress behavior.
Izvestiya MGTU MAMI. 2012;6(2-1):367-370
367-370
370-376
376-380
Slipping of equalizing element of a synchronizer in preselective gearbox
Abstract
There is considered the process of gear shifting with help of synchronizer in automobile and tractor gearbox taking into account working driving moment from disconnected friction clutch coupling. There is suggested the method of calculation of work of slipping and the time of synchronizing for conditions of synchronizer loading taking into account working driving moment from disconnected friction clutch coupling.
Izvestiya MGTU MAMI. 2012;6(2-1):380-387
380-387
Increase of dynamic qualities of diesel generator in the supplementary energy system of road train
Abstract
There are considered possibilities of improving the dynamic properties of diesel generators in the supplementary energy system of road train and identified influencing factors and control features. There is suggested the system of automatic regulation of diesel generator which had passed road tests and allows to solve the task.
Izvestiya MGTU MAMI. 2012;6(2-1):387-391
387-391
392-397
397-402