Fuzzy state controller applied for two-mass system

Application of control methods based on state vector leads to precise tracking of reference signal. However, the parametric or measurement disturbance definitely make it difficult to maintain the correct operation of the system. Therefore, in this paper, implementation of an additional fuzzy element is proposed. It can recalculate, using information about the speed error, the coefficients in the feedback paths. Then, shape of the state variables and the dynamics of the system are forced properly. In the design process, the metaheuristic algorithm -Symbiotic Organisms Search (SOS) -was used. The electrical drive contains elastic shaft. The results of the simulations confirm the correctness of the analyzed method. Moreover, the experimental tests were performed (with the dSPACE 1103 card, the system contains two DC motor with 0.5kW).