Fuzzy PID controller
Fuzzy control is a kind of control method of fuzzy set theory. Especially in some large time delay, time varying and nonlinear complex system, the system can not get the exact mathematical model, and the fuzzy control does not need the exact mathematical model of the controlled object.
This controller not only has the PID control has the advantages of high precision, but also possesses flexible fuzzy control, the advantages of strong adaptability, of complex control system and requirements of high precision servo system can obtain good control effect is to control in recent years in the field of very active a branch.
Fuzzy adaptive PID algorithm of box tree. Through the analysis of system performance and the quality of the conventional PID control, this paper puts forward a kind of PID control strategy using fuzzy box tree and branch and bound algorithm and minimum number of fuzzy inference rules to achieve the adaptive adjustment of PID parameters. The method has the characteristics of simple structure, strong robustness and good dynamic quality.