In this paper we propose an approach to the implementation of the automatic control system of autonomous unmanned surface vessels on the example of a surface mini-ship "Neptune". Synthesized autopilot algorithms based on the theory of control of dynamic objects, developed by prof. Pshihopovym. A program of mathematical modeling. simulation results, which confirm the correctness of the proposed algorithms.

Keywords: autopilot, surface ship, mathematical modeling

The stated task is development of planning system of energy-efficient trajectories for stratospheric airship. Different intellectual approaches for this task were analyzed. Genetic algorithms were chosen. Results of application of genetic algorithms were considered.

Keywords: MAAT, high-altitude airship, control system, planning, genetic algorithm

The technique of the geometrical analysis and the analysis of force loading of combined drills with the replaceable multiface plates is offered in this work. This technique is allowing to determine geometrical parameters and specific force loadings in each point of a plate’s cutting edge taking into account its orientation in the drill case. Application of this technique allowed to establish the reasons of the drill’s low durability. The offered technique allows to design drills from the minimum unbalanced radial component of cutting force which increases its working capacity and the processed holes quality. New designs of combined drills both with two, and with three replaceable multiface plates are offered in this work. The durability of this new drills is increased by the plates mutual turn for the minimization of an unbalanced radial component of cutting force  

Keywords: combined drill, replaceable multiface plate, drilling, design, equilibration, geometrical analysis, the analysis of power loading

The article deals with the problem to determine the strength properties of the ballasted clogged sand dunes, including the action vibrodynamic loads. According to the results of laboratory experiments for the first time we obtained the reduction of specific adhesion and angle of internal friction of gravel ballast material on the density and the percentage of blockage of sand dunes under the influence of both static vibrodynamic the action of loads.

Keywords: crushed stone ballast, sand dunes, weed, vibrostabilometr, specific cohesion, internal friction angle

The results of operation of electric locomotives «O'ZBEKISTON». Describes the general characteristics of the railways in Uzbekistan, the basic characteristics of electric series «O'ZBEKISTON». It also presents calculations of generalized reliability indicators and the main directions of development of repair systems.

Keywords: Railways of Uzbekistan, electric locomotives series «UZBEKISTAN», reliability