ABSTRACT
This paper deals with brushless DC position control systems of unknown external load
disturbances and plant parameter variations .Such systems have a very complex dynamic
characteristics and highly nonlinearity, a conventional linear control design may not assure
satisfactory requirements. One promising method to improve the dynamic response of such
systems is adaptive fuzzy controller (AFC) which has been proposed. The proposed AFC is
inherently robust, and is based on simple rules that are derived from engineering and
experimental results. Simulation results show that the proposed approach can achieve accurate
velocity/position servo tracking in the presence of load disturbance and plant parameter
variations. Excellent flexibility and adaptability as well as high precision and good robustness are
also obtained by the proposed strategy.