Research on Application of Fuzzy PID Controller in Two-Container Water Tank System Control

Since the liquid level control system of the two-container water tank is characterized by nonlinearity and timing-varying parameter, the paper, based on analysis of the limitation of conventional PID controller, adopts fuzzy logic and applies the control method of setting PID parameter by fuzzy rule to the two-container water tank liquid level system control to design a fuzzy PID controller and carries out online setting on three parameters of PID by MATLAB software simulation. The simulation test shows that the fuzzy PID controller is better than conventoinal PID controller in terms of performance and is able to effectively improve control effects.