Simulink modeling and simulation of parallel fuzzy PID composite controller

fuzzy control;  PID control;  Simulink;  S-function

In the design of parallel fuzzy PID composite controller, the ratio of fuzzy control part and PID control part must be adjusted in time according to the deviation, and this more complex control strategy is difficult to achieve by using ordinary Simulink module. The S-function is used to solve this problem, and the S-function is first written based on the MATLAB language to realize the adjustment of fuzzy control and PID control ratio, and then the S-function program is called in the Simulink simulation environment to establish the simulation model of fuzzy PID composite control system. The simulation model of this method is simple and easy to program, and it is convenient to adjust the proportion of each part in the parallel structure with the size of the deviation, so as to achieve better control effect.