Abstract: This paper presents an adaptive control based on the rule-adaptive fuzzy compensator according to the electrohydraulic servosystem’s nonlinear characteristic in the simulator. This approach is based on the fact that the servosystem consists of a linear-part and a nonlinear-part . The former can be controlled according to its mathematicalmodel, and the latter is mainly controlled by the rule-adaptive fuzzy control. The simulation shows that the proposedapproach can achieve an accurate and robust performance.

Key words: electrohydraulic servosystem, simulator, adaptive control, rule adaptive fuzzy compensator