Study on time-delay system with fuzzy soft-switch control based-on Smith predictor

Due to the phenomenon of time-delay of industrial process, temperature time-delay experimental control system has been set up. Through experiments, the object model has been established. Because of the object model has the characteristics of time-delay, the control strategy of Smith predict and fuzzy-PID mixed control based on rules has been used. Theoretical analysis and the results of simulation show that this control method has shorter stable time and smaller stable error compared with pure PID or fuzzy logic controller. Fuzzy-PID mixed controller based on rule overcomes of the fuzzy-PID soft-switch controllerspsila problems that difficult to achieve switching without disturbance, so it can be achieved more satisfactory results.