An approach to PLC-based fuzzy expert system in PID control

Abstract

Fuzzy control systems have been successfully applied in many cases to which conventional control algorithms are difficult and even impossible to be applied. Fuzzy models have received significant attention from various fields of interest. Especially so called the Takagi-Sugeno-type fuzzy model which superbly describes a nonlinear system. In this paper we present implementation of universal function block of fuzzy expert system and PID regulator for PLC Simatic S7 300/400. Control system with implemented fuzzy expert system and PID regulator and visualization is designed. © 2011 Springer-Verlag.