Vol 1, No 2 (2007)

The article examines the statement of the problem of optimal design algorithm, which should be used in the system of the vehicle automatic clutch control. Durability of the friction linings of the slave drive is used as the optimality criterion.

The article is devoted to the review and comparative analysis of the results of the experimental study of the 3-axis all-wheel drive vehicle, equipped with hydrostatic transmission. The authors proposed the technique of experimental evaluation of controllability and stability of multi-axis vehicle. The conclusions about the need for an automated control system.

The authors describe the benefits of vehicles with hybrid power unit (GSU), consider the schemes of hybrid propulsion vehicles. The article presents a design developed by the experimental all-wheel drive vehicle with hybrid power plant, made by a parallel circuit; description of the experimental vehicle test bench for fuel economy and emissions, held at the Federal State Unitary Enterprise NITSIAMT; the results of tests confirming the reduction of fuel consumption and emissions of cars with hybrid powerplant.

The article presents a brief overview of modern electromechanical actuating devices that automate the management of mechanical clutch and a mechanical transmission; automation of mechanical transmission is highly actual.

The authors study the cooling system of the frame of a weakly-clogged rotary heat exchanger of small-size gas turbine engine which ensures lower temperature non-uniformity and thus leak through the seals of the heat exchanger.

This publication proposes a method of obtaining mathematical identification of the engine characteristics on the basis of existing characteristics obtained experimentally. The feature of the proposed method is in the fact that the result is the dependence of the moment created by the engine on two variables: the engine speed and the control parameters of the operation mode. The proposed method is disclosed by example of receipt of the specifications for DT466 diesel.

The article proposes to use V-belt transmission with a spring loaded idler pulley in the carriage power generator drive. This will increase the belt life with some increase of traction transfer power

The article describes the interaction of elastic wheel with deformable ground. In The mathematical model makes a number of assumptions which drastically simplify the engineering calculations.

The article gives a description of information-measuring system (IMS) MIG, intended both to measure the dynamic characteristics of high-speed tracked vehicle and its suspension characteristics, and to identify characteristics of the test track used for testing such machines. The authors used the algorithm of determination of the instantaneous radius of rotation, measured using the IMS MIG on the basis of the Doppler effect.

The paper presents the results of mathematical modeling to study the research of motion of AWD six-wheeler "Gidrohod-49061" with continuously variable transmission, operating in a locked mode of inter-axle connection. The paper analyzes the influence of interaxial deviation in the transmission control on the parameters characterizing its work, as well as on the efficiency of the vehicle in general.

The paper presents results of the analysis of the problem of hazards identifying in the vehicles design. The paper analyzes various approaches to the identification of hazards arising during vehicle operation. The problems functional failures list generation and it's its completeness is considered. The author formulates hypothesis that allows to develop a new method for determining the list of functional failures, and to improve the validity of vehicle safety system.

The authors propose to optimize inventory levels in stock companies without using the hypothesis of functional forms of probability density functions and time in explicit form.

The paper presents the latest developments of VNIIINSTRUMENT. These include a range of cutting tools with high-micron carbide and high-quality composite coatings based on (TiAlNb) N for high-speed machining of light alloys and heat-treated steels; face mill assembly with a lightweight aluminum bodies; range of turning tools, end and face mills, equipped with cutting blades made of superhard materials for the processing of a wide range of metallic and nonmetallic materials; drill for deep drilling, etc. Also, VNIIINSTRUMENT carries out works in the field of standardization of tools, development of technological process for wood- and metalworking, all types of tools and equipment, theirs maintenance.

The paper presents the results of modeling of the assembly process of cylindrical parts on the basis of low-frequency vibrations vibratory bearing with basic part and elastic fixing of the installed components. With the use of developed software the influence of technological regimes and the design parameters of gripper (in particular, the rigidity of fastening parts) was determined.

The paper presents the method which allows rapid and reliable determination of the magnetic force of attraction (capture) of a particle at any point of the investigated area of magnetic influence. On the basis of measurements it was shown that in the threshold zone (around the edges of magnets) the field is much more heterogeneous than in the "shadow" zone. Besides, the paper estimates a failure zone of the spacing amount 20-30%. As a result of numerous measurements of the attraction forces of ferroparticle balls of various diameters in the threshold area one of the basic expressions for its determination was defined. Also, the basic expression for determining of capture forces od non-spherical shape ferroparticles.

Products of "bulge rod" type can be obtained by plastic working both in conditions of cold deformation, and in condition of half-hot and hot or hot deformation. Using crosscut extrusion in stamping technology can reduce energy costs and eliminate the possibility of destruction in the zone of transition from thickening (flange) to the core of the product. The effectiveness of the transverse processes and combined extrusion is ensured due to a significant reduction in consumption and increasing of CMM (in 1,5-2,5 times) and reducing the complexity of subsequent mechanical machining. However, in addition to improving of thickening set technology, a real question remains about how to increase the deformable part of the core piece, and, consequently, increase of the final ratio L / D. The article presents the results of experimental studies of the radial extrusion process with the running hotbed of deformation product type rod with a thickening. A principal possibility of obtaining products of type bar with a thickened by combining in a single instrument two technological schemes: the landing and transverse (radial) extrusion. Accomplished studies have quantified estimation of changes in the height of thickening, depending on the ratio of the planted part of the product to its diameter, and, depending on the composition of the technological lubricant. The obtained data can be used in numerical simulation of the radial extrusion of the running hotbed of deformation.

The paper examines the tools with several working surfaces which are used for various types of machining illustrated by cutter for combined machining and plastic deformation, notably the cutter with round plate, cutter with multisurface plate, cutter with raised corner, which may be turned about 3 axis. Besides, the device for combined edge cutting machining and plastic deformation is examined. The paper presents the optimal ways of machining element location when hardened and non-hardened steel machining, and the possibility of phase transformation implementations in the surface layer at high-temperature rapid burnishing. It is found that the research on the tool location influence on the various quality parameters during burnishing makes a great contribution into operation improvement

The paper examines the combined method of cutting-deforming machining of quill cylinder type nonrigid parts, which increases productivity, quality of machining and working accuracy. The basic feature of the method is that the machining process is accompanied with tensional and bending oscillations caused by geometrically induced errors in the workpiece cross-section, setting errors and various static and dynamic tuning errors of cutting and deforming tools (for example, the static tuning error of structural elements location of processing unit). On the basis of analysis of expressions for resultant error and oscillation equation the authors obtained formula which determines actual cutting depth and lateral force on the part when cutting. On analyzing the alternation of cross section of tube on the example of single-pass part cutting (with maximum transverse force) it was found that in the process of cutting the cross-section of the tube is deformed by negligible quantity.

The paper presents the research of viscoelastic properties of polymeric constructional materials based on polycarbonate using the methods of acoustic spectroscopy. The research was conducted using the method of free torsional vibrations at the low-frequency acoustic spectrometry, performed on the basis of inverse torsion pendulum. In the measurement process the dynamic shear modulus G 'and mechanical loss-angle tangent tgδ have been obtained. Measurements were performed in a wide temperature range from -180 to 200 ° C. It was shown that the reduction of impact strength at low temperature area is connected with the difference in chemical structure and the introduction of impact modifier.

The composite materials based on polyepoxy containing various luminophors are obtained. Such compositions exceed in brightness the polymer marking materials with bloomless ingridience at the expense of the energy transformation of ultraviolet and short-wave visible radiation in the long-wavelength (green-yellow or red) glow. The paper shows the prospects of application of composite materials for fluorescent composite materials for highways markings and road signs.

Strategic changes in the internal environment of an industrial enterprise as a reaction to external influence are based on the prediction of changes in national approaches with regard to Russia's entry into the WTO, where economic processes are increasingly dependent on environmental factors. This paper describes the organizational and economic mechanism of management based on present ecological concepts, with a full range of environmental issues taken into account as a normal stage of planning and development of the manufacturing process and industrial products, which is not regarded as a separate (mostly final) operation. Approbation of the proposed model and estimation of production management efficiency in view of the developed set of quantitative indicators showed not only reducing the negative industrial impacts, but also a significant economic effect.

The paper presents various methods (including non-proven ballistic method) for power characterization of the working zone of cleaning unit. The authors developed and implemented a new method based on forced drift of ferroparticles along the remotely positioned line through this area (with subsequent calculation of the normal component of the capture power).

The paper examines the problem of ideally plastic material flow in the fixed area through the elastic-deformable surfaces. The flow area appears as the isosceles trapezium; the matrix of tool is modeled as a elastic half-space. The initial integro-differential system comes to single Hammerstein integral equation. The paper proposes the method of successive approximations for solution of this equation. The analysis of this solution is given.

The paper presents modification of rigid-plastic finite element model of sheet metal forming in case of orthotropy of plastic properties of sheet metal. The paper outlines the results of computational and experimental investigation of sheet metal and yellow metal tension under large plastic deformation.

The paper examines the development of virtual economy (electronic commerce and e-business) in Russia, degree of readiness for this type of economy and commercial availability of networking.

The paper states that the existing methods for assessment of the competitiveness of automotive products show the lack of criteria for their evaluation, fragmentation of approaches to the qualitative assessment of products, lack of principles of integrated assessment of quantitative and qualitative parameters of competitiveness. The proposed mechanism involves the consistent procedure for assessment of competitiveness of products using certain tools.

The paper reveals the need for a deeper understanding of contemporary economic German vocabulary. This requirement is caused by the need of Russian specialists in the German language acquisition in a special field of communication in conditions of social market economy of modern Germany.

The paper analyzes the conditions that ensure the competitiveness of the international automobile alliance Renault-Nissan.

The paper presents a conceptual basis for the generating of national system of higher professional education in the field of engineering and innovation technique s. New forms of organization require new content, including a strategic goals of future professionals training, modern epistemological aspects of learning, new learning methodology.

The paper analyzes the factors affecting the effectiveness of teaching "Engineering Graphics" in technical universities and suggests some ways to improve it. These include the modernization of the "Engineering Graphics" course (projection and technical drawing), i.e. in a form close to human-computer dialogue. For this purpose it is proposed to use special directories outlined in the paper.