PID参数模糊自整定非线性系统仿真研究

Study on Nonlinear Control System Based on PID Controller with Fuzzy Self-adjusting

针对常规PID控制器不能在线进行参数自整定的问题,构造了一个自适应模糊PID。通过模糊控制规则在线调整PID控制器的参数,并利用MATLAB语言对该控制器进行了计算机仿真。仿真研究表明,该控制器能迅速消除系统余差,改善普通模糊控制器的性能;既具有PID控制器高精度的优点,又具有模糊控制器快速、适应性能的特点,保证了调节系统具有良好的动、稳态特性。

Aiming at the problem that conventional PID controller can＇t adjust parameters itself on line, the self-adjusting PID controller is built. Using fuzzy control rule, the three parameters of PID controller can be adjusted adaptively on line, and a simulation of this model is realized successfully with MATLAB. The result of simulation proposed that the controller can eliminate steady state error of system and improves the performance of ordinary fuzzy controller. It possesses both the precise character of PID controller and flexible advantage of fuzzy controller, and can guarantee that the regulation system has good dynamic and static quality.