It is offered approximate approach to time-suboptimal control for smooth stationary systems with phase constraints are considered. This approach associated with the feedback realization of time-suboptimal control nonlinear systems. The efficiency of the method allows synthesize suboptimal control law by optimal control law of lower systems. In the general case, this approach allows realize compositional synthesis of all nonlinear control systems by effective and reliable results of optimal dynamic systems first order.

In the given work the basic attention is given a problem of construction of control in critical area where it is impossible to define control just as in other non critical areas. As a whole in work the interesting theoretical result which allows to offer new type of regulators for nonlinear objects of control is received. This regulator refers to as a nonlinear regulator of variable structure.

The casual processes of the sale are considered as casual Poisson flow of the all-stock deals, sizes which also are a random quantity. It is shown that if the known distribution of probability of the sizes of the deals and density of the flow of the buyers, that possible calculate distribution of probability of the sizes of the sale. There are laid down conditions, under which this sharing the sale will not be normal. Cite an instance distribution in real process of the sale, which are differ from Gauss distribution.

Given clause is devoted to a statement of algorithm of restoration of a periodic component of a signal in systems with an additive handicap of peak character at absence of aprioristic data on frequency of a restored signal.

Problem of computer model development of Sudan and Guruswami's list decoders for generalized Reed-Solomon codes and concatenated codes is solved. Strict algorithm of list decoding of concatenated codes is given. The block diagram and program realization of decoder are constructed.

The present considered work modification of algorithm Alekseev for reception of the approached decision of a minimax problem of the theory of schedules is considered to system with selectivity of computing units. Keywords: the theory of schedules, a problem of planning, list of algorithm Alekseev.

Compass is the popular instrument used in navigation. In the past, compasses were used to determine the coordinate of ships on the sea and position of people in the deep forests. Nowaday with the development of technology, electronic compasses contribute the excellent solutions in navigation, especially in navigation of mobile robot. Electronic compass with many advantages -compact dimension, high resolution, easy to use and high effect - will be the optimal solution in determining angle of goal point. By giving the right angle of goal to the controller of robot, electronic compass along with other sensors such as encoder and ultrasonic, infrared sensor help increase the result of navigation. In this paper we suggest using of electronic compass in mobile robot navigation to reduce the errors. This method has higher effect and the process of navigation become simplier.

A general approach of a mathematical model building of function a cleaning unit of grain with different structural schemes is given, a rational parameters and functional indexes are synthesis.

The research provides a new data about the properties of cultivated environment for developing a power-saving operating elements for grain processing of a farming animal's forage. It received a new quantitative estimations of changing the basic rheological constants of damp grain in processes of rolling, determining their technological and physic mechanical characteristics. Dependences 168 Раздел Инженерно-агропромышленные специальности» between technological modes and structural parameters of operating elements for rolling, suitable for performance engineering are proved.

Conditions of motion stability loss is considering relative to mechanical system, interacting with media, forming in tribocoupling. Conditions of forming and role of dissipative, gyroscopic, potential and circular forces, which formed naturally in tribocoupling and changed in evolution transformation, are shown.

In this research a method of the hydrodynamic calculation of the composite conic bearing is worked out on basis of the non-stationary equations of Navier-Stokes for the case of the «thin layer» and the Darsy equation with the use of the method of the constructional superposition. This research presents an ap-193 Раздел Машиностроение preciation of the influence of value of the angle of cone and an extent of a porous layer on the performance of a composite bearing.

The problem of appearing defects in the form of crack formation on some areas of forgings can be explained by considerable non-uniformity deformation occurred in these areas. To optimize solving the problem in we suggest the method of defining these possible destructive areas.

Using the method of electroresistance obtains data about course martensite transformations in steel under action of the magnetic field, formations specifying an opportunity stress-assisted martensite in temperature interval М_S-М_F in which superplasticity is shown. 208 Вестник ДГТУ, 2007. Т.7. №4(35)This opportunity is caused by magnetic heterogeneity austenite, presence in a paramagnetic matrix nanostrustural ensemble ferromagnetic ordering clusters which perceiving energy of an external magnetic field through magnetostrictive pressure, change fields of elastic forces in microvolumes of a nuclear lattice of a matrix, that causes to decrease in energy of formation germinal center of the critical size.

The question of optimization in deep drilling under the adaptive control system with restriction to torque value in drill is considered.

There are given the research results conformably to the working accuracy with the help of combined carbide-tipped with heightened thermal conductivity lathe tools. The thermal broadening reduction of the newly-designed combined lathe tools is determined.

Results of experimental researches about influence of structure of trumpet steel 20 on characteristics of resistance to destruction are resulted. It is shown, that with the purpose of achievement of the greatest possible characteristics of resistance it is necessary for destruction to determine dependence of these characteristics at a variation of a volume fraction of a strengthening phase and the attitude l/d.