The Application of Fuzzy Control in Liquid Level System

For a long time, the choice and definition of the parameters of PID are very difficult. There must be a bad effect if that you do not choose nicety parameters. To strictly limit the overshoot, using Fuzzy Control can achieve great control effect. In this paper, we take the liquid level of two water tanks for object, and use MATLAB to design a Fuzzy Control. Then we analyze the control effect and compare it with the effect of PID controller. As a result of comparing, Fuzzy Control is superior to PID control. Especially it can give more attention to various parameters, such as the time of response, the error of steadying and overshoot.