Vol 3, No 2 (2009)

The article describes the algorithm of the adaptive trailer control system for huge trucks. The system includes corrective control channel for optimization of the lateral displacement of the semitrailer relative to the trajectory oh the truck. Author used LMS Virtual.Lab Motion software for the algorithm's refinement.

The technical article presents compensating axial force dependent on transmitting engine torque, suspension displacement and constant velocity joint design. Also authors showed influence of powertrain vibration on compensating axial force.

The paper considers an approach for pollution modeling from motor transport. It is based on equations written at universal form what allows to simplify the modeling process. The numerical realization is based on control volume method. The algorithm and computational results for distribution of pollution from motor transport are presented.

The article considers the way of increasing of internal combustion engine fuel economy by means of internal use of exhaust heat energy.

The article summarizes theoretical and methodological aspects of building of tractor speed control automation. Control aims are turned into several routine problems typical for specific technilogical processes operated by tractor units.

The article presents comparison test results of ЯМЗ-236НЕ2-3 diesel engine operating on diesel fuel, on mix and pure biodiesel fuel in standard version and with upgrade fuel system and optimized injection lead angle. Corresponding adaptation for biodiesel fuel operation enables maximum torque and nominal power on the same level as for diesel fuel and fuel efficiency increase.

The article is dedicated to research of application of electrohydraulic discharge in diesel fuel systems. The electrohydrodynamic pump is developed in MSTU «MAMI» and RMAI, it excepts the shortcomings of fuel systems containing plunger pump of high pressure and can be used in Common Rail fuel systems of diesel engines as a pump of high pressure.

The article gives an analysis of several main variants of hydrokinematic layouts enabling maximum realization of potential advantages of hydrostatic transmissions.

The paper examines the dimension making procedure for combined cutting-deforming part process of flexible shafts. The best way to remove the flexibly-restored metal is to use the tools with zero cutting rim. In terms of micro geometry of the part surface the cross-section of cutter plate influences the cross-section of the surface.

The paper presents the research on influence of applied lubricant on the physical-mechanical properties of bore surface layer under the deforming broaching based on the following factors: surface hardness - (Нμ); surface hardening - δsurface; maximum hardness - HVmax; maximum depth of hardened layer- h; allocation microhardness. It is found that the application of metal-plate lubricants influences positively on all the indices.

In the present-day machine-building creating of high-performance machining processes, subject to the requirements of resources, energy and ecology is one of the most important problems. The part of parameters of the mathematical model remained constant, while others varied. The research result contain arithmetical mean working errors of cross-sections of the part, calculated for ten equidistant points of each cross section, as well as an arithmetic mean and quadratic deviation of error. The subject of research is the technology system of combined cutting-deforming proccessing, because manufacturing application of this method shows its great potential in achieving of high quality and performance.

The authors obtained and analyzed the new characteristics of working zones of perspective magnetic separators for cleaning of granulated and liquid media. Those characteristics give information about principal features of such zones, very important by creation of industrial cleaning machines.

The article presents the results of experiments involved in investigation of a set of properties of anaerobic material. The tests demonstrated empirical dependence of the joint efficiency on the scale factor, type of tested load, activity of materials to be bonded, polymerization time. The article reveals the factors affecting the joint efficiency, and proposes methodology for calculation of adhesion coefficient for various brands of anaerobic materials. It determines the impact of thermophysical properties on joint strength, and establishes their limiting values. It was established that the damping capacity of anaerobic materials is to be taken into account when certain filling compounds are added to them. The investigation extends the application of anaerobic materials in assembling.

In this article there were examined the questions of interaction between the abrasive polymer brush's fibre and the treating surfaces. There were cited experiment's data about the examination of fibre's elasticity

In article is open the questions wire brash, its specific and advantage in comparison with other ways of performance of operations of preparation of surfaces of preparations for anticorrosive covering of metal, welding by explosion etc. In article are consider еhe questions of the basic parameters of cutting at wire brash and on what they depend, and as a choice of modes of cutting, their influence on quality of a surface and productivity of process.

Application of engineering methods of mathematical modeling of engineering systems and products based on the theory of polychromatic sets and graphs improves the efficiency of the production cycle. This approach allows to automate the design and technological pre-production, as well as improve the quality of products while reducing its cost.

In measurements of small segments of geometrical objects such as circles, spheres, cylinders etc., object parameters are defined with large errors, that can essentially exceed both errors in the part manufacturing and errors in measurements. That's why such measurements could not be performed on coordinate measurement machines (CMM), but in the same time there is a great requirement in them in industry. Large errors are caused by ill-conditioned problem of small segments measurements. The method allowing to improve conditionality of considered problems by their mathematical regularization and to raise decision accuracy is described in this article. Offered method expands CMM possibilities, allowing to perform measurements that were not performed on them earlier.

The paper considers the technique which allows estimating the borders of stability subject to p- parameter of transfer function of the open-loop system. For calculations the MathCad is used.

An incremental finite element membrane model for the analysis of sheet metal forming processes under action of rigid tools is developed on the basis of a flat triangular element with the linear law of displacements' distribution. The nonlinear effects due to the changes in shell geometry and contact states during each incremental step are taken into account. An example on square punch stretching of metal sheet is considered.

The paper considers information as an instrument for effective decision-making. To analyze the information there are the reasons to create an automated system for its processing in order to obtain integral estimation of business and financial activities of the enterprise characterizing effectiveness of its management.

In process of globalisation development the competition intensifies, getting global character and reaching the hypercompetition level. The aspiration of achievement of competitiveness, proceeding from the developed best world levels defining it becomes a main goal for the majority of the countries, transnational and national companies. The effective instrument for this purpose is benchmarking that helps company to meet world market requirements.

In article is described a technique of teaching of special disciplines to students 3-4 courses in modern conditions. The basic conclusion by the given technique consists that the engineer cannot be prepared qualitatively for work in the modern industry sated with hi-tech techniques without developing in it of skills of scientific work, and skills of work as the expert, on what that to a narrow special question. As a special question, in the course of performance laboratory and term papers, work by definition of quality of mobile phones and requirements of various groups of buyers to qualitative characteristics of these phones has been offered students.