This paper focus on the instability of asynchronous motor direct torque control system which caused by PID parameter changes. In order to improve the self-tuning capabilitiy of PID countroller, enhance the speed and stability of control system. fuzzy adaptive method was adapted to optimize PID parameter. Simulation results show that: this strategy improved the performance of direct torque control system significantly.
Fuzzy Adaptive Control System of a Non-Stationary Plant