The article demonstrates the problem of controlling an asynchronous motor of an electric vehicle in the acceleration mode and maintaining the speed of the vehicle at the desired value with dynamically changing torque. To solve the problem, the dynamics of the movement of an electric vehicle was described, a vector control system with direct torque control with switching the inverter keys was described, which provides a rapid change in the electromagnetic moment practically without changing the speed of rotation of the motor rotor. On the basis of the given model, the system was synthesized in the Matlab / Simulink package, and the simulation results were obtained. The synthesized control strategies ensure the achievement of the set task of accelerating and stabilizing the speed of an electric vehicle, taking into account the passport characteristics of an electric vehicle, and the stability of a closed system.

Keywords: electric vehicle, control systems, vehicle dynamics, vector control, direct torque control

The article demonstrates the study of the processes of controlling the power system of an electric vehicle and the processes of energy distribution in it using pulse-width voltage converters. The general structure of the electric vehicle’s power system and elements of its subsystems are described. The pulse-width boost and buck DC-DC converters are considered. Based on the given mathematical model, the synthesis of controllers is carried out using the methods of the synergetic control theory. Mathematical modeling of the closed DC-DC converter control system, providing asymptotic stability and adaptability to parametric disturbances, is performed.

Keywords: electric vehicle, pulse-width converters, control system, ADAR, synergetic control theory, integral adaptation

The article is devoted to the problem of planning the trajectory of an unmanned vehicle-electric vehicle. The results of the development, software implementation and research of the algorithm for constructing the optimal trajectory of the unmanned vehicle in a well-known environment - part of the urban environment are presented. As a basis, a fast-growing random tree (RRT) algorithm was used to construct a path between two points. At the same time, it was optimized regarding the algorithm for removing unnecessary vertices in order to build the optimal trajectory as well as taking into account the vehicle’s kinematic constraints using the Dubins curves on the turning radius of a transport electric vehicle for entering turns. As input data, a binarized map of the city’s terrain was used, as well as set coordinates of the starting and ending position of the vehicle. Research is also conducted on the speed of calculating the RRT method, depending on the system power.

Keywords: unmanned vehicles, electric vehicles, motion planning methods, sampling methods, RRT algorithm, Dubins curves

The influence of the laser material on the structure of the photocell based on thin films of zinc oxide and amorphous silicon on glass. It was modeled recrystallization processes in the solid state, considered the interaction of the surface of silicon by pulsed laser radiation, calculations are made for the surface temperature at the recrystallization of the amorphous film on Nd:YAG laser installation with length wave 532 nm. The proposed thermal model of the solution of the problem showed that the structure melt is already at the earliest stage of processing and the temperature distribution in the amorphous layer will depend on the structure of the ZnO film, as evidenced by modeling in ANSYS. According to the results of experimental studies performed, it can be said that the thermal conditions at the plant are poorly worked out, as evidenced by the roughness of the film of the amorphous layer. The mechanism of crystallization of the melt also requires refinement. The obtained results showed the prospects of the direction of silicon-on glass and ZnO

Keywords: solar cells , laser recrystallization , an amorphous layer , ZnO film , thermal model , modeling of thermal modes , tube scan