VIRTUAL REFERENCE FEEDBACK TUNING APPROACH TO FUZZY CONTROL SYSTEMS DEVELOPMENT

The paper proposes Takagi-Sugeno PI-fuzzy controllers (PI-FCs) dedicated to a class of integral plants. Two PI controllers are developed first by Virtual Reference Feedback Tuning to ensure the desired control system (CS) performance with respect to the reference input. Other two PI controllers are developed using the Extended Symmetrical Optimum method to ensure the desired maximum sensitivity equivalent to good CS performance with respect to the disturbance input. Then, accepting the approximate equivalence between the fuzzy controllers and the linear ones, a development method for the PI-FCs is suggested. Experimental results are included to illustrate the effectiveness of the development.