An approach to PLC-based fuzzy control

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 fuzzy PS/PD function block implemented to the PLC Simatic S7 300/400. Control system with implemented PS/PD regulator and visualization is designed. Fuzzy PS and PD regulator is designed also in Matlab for testing purposes.