An improved fuzzy PID control algorithm applied in liquid mixing system

Abstract

In view of the characteristics of the industrial production control system with multi-parameters, nonlinear, long time delay, an improved Fuzzy-PID controller was put forward with real time parameters. This paper introduces the basic idea of PID and Fuzzy-PID control, the application of the fuzzy-PID controller. The industrial process of liquid mixing is characterized by high nonlinearity, long time delay and multiparameters. Therefore, an on-line controller based on improved fuzzy logical fuzzy-PID was designed. Then, the three simulation curves of conventional PID algorithm, fuzzy-PID algorithm and improved PID algorithm were compared between the three. The results showed that the improved fuzzy-PID control algorithm has a performance of shorter response time, smaller overshoot, better robustness and better stability. It is concluded that the improved fuzzy PID algorithm is reasonable to improve the control effect, implemented the real time self-adaptive adjustment of the liquid mixing parameters.