FUZZY MODEL APPLICATION FOR SYNTHESIS OF SYSTEMS OF NONLINEAR OBJECTS AUTOMATIC CONTROL

In this paper an approach to the approximation of nonlinearities in electromechanical systems is proposed. This approach involves the synthesis of fuzzy controller, which provides switching between the vectors of control actions depending on the value of the signal at the input of non-linearity, which is approximated. The proposed approach is tested on the example of nonlinear model of the electric arc furnace Nonlinear model of thyristor converter is approximated using the proposed approach. Switching occurs between feedback coefficients that are synthesized for different values of the linear thyristor converter's gain. Qualitative and quantitative results which indicate the feasibility of its application are obtained. They indicate the feasibility of the proposed approach, because it provides not only a proper approximation of nonlinearities, but also allows your transients in the output signal of the system and in the interim, thereby improving key performance indicators of the investigated system.