INFLUENCE OF WEIGHT OF FUZZY RULE ON CONTROL PERFORMANCE OF STRUCTURE SUBJECTED TO EARTHQUAKE

Abstract

Fuzzy control, FC, based on the fuzzy set theory of Zadeh, has many advantages: easy because the mathematical model of the controlled object is not necessary when designing the controller, the expert’s knowleadge is used in terms of the qualitative control rule, ... However, the fuzzy rule bases are often used in the same form for different controlled object classes, hence, they can be not entirely appropriate for a specific controlled object. Therefore, in the present work, the influence of weight of fuzzy rules on control performance of a multi-degree of freedom structure subjected to earthquake. Then, important level of each control rule is investigated as well as a new rule base which is more appropriate for the studied model is proposed. The numerical simulation results indicate that the new rule base improves the performance and descreases the computational time of the controller.