UDC 519.6, 621.3

Y.V. Bebikhov, A.S. Semenov, M.N. Semenova, I.A. Yakushev

The MatLab software package is considered from the point of view of a universal modeling environment for technical systems. The analysis of methods of mathematical, structural and physical modeling in MatLab using the library of blocks Simulink and application SimPowerSystems. For the study, an electromechanical system was chosen – a DC motor with independent excitation, as one of the most common for driving technological installations of cyclic action. With the help of a laboratory setup, a simulation model has been developed that allows you to evaluate, analyze and compare the results obtained during modeling with real data. To carry out the simulation, additional parameters of the DC motor were calculated, which include the active resistances and inductances of the armature windings and excitations, mutual induction, moment of inertia, design and time constants of the motor. Physical, structural and mathematical models are developed. The simulation results are obtained in the form of graphs of time dependences of the main engine parameters. A detailed analysis of the angular speed of rotation of the DC motor was made, since it is the main coordinate for regulation. Qualitative and quantitative characteristics of the transition process, such as control time, magnitude of overshoot, and the number of oscillations, were subject to assessment. During the evaluation and analysis of simulation results, the advantages and disadvantages of various methods of modeling technical systems in the MatLab software package were established. Conclusions are made about the universality of the MatLab environment for the possibilities of a detailed and accurate assessment of complex technical systems.

Keywords: modeling of technical systems, MatLab, Simulink, DC motor, angular rotation speed, transient, error.

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