Comparison and Composite of Fuzzy Control and PID Control

A fuzzy-PID composite control method is presented based on the comparison of fuzzy control and PID control.First,a common PID controller and a basic fuzzy controller are designed separately;and then,the advantages and disadvantages between the two methods are evaluated after their comparative study;at last,a fuzzy-PID composite controller is designed in order to draw on each other's merits.The composite controller can control a system by automatic switching between fuzzy control and PID control according to the range of error,if the error is large,the fuzzy control acts to reduce overshoot and shorten regulating time,else,the PID controller acts to remove static error.It combines the merits of the two control methods,and its synthetic qualities are better than the common PID control and the basic fuzzy control.The results of the simulation show the correctness and validity of the methods.