The research of adaptive fuzzy sliding mode control in electromotive power loading simulator for actuator

Aimed at tracking precision of a certain electromotive power loading simulator for actuator with uncertainties and external disturbance, a new design approach of an adaptive fuzzy sliding mode controller (AFSMC) for nonlinear systems with mismatched time-varying uncertainties is presented in this paper. An adaptive parameters adjuster and fuzzy control rules are introduced into the sliding mode controller. The adaptive law is used to adjust parameters of the controller on-line to improve the performance of the fuzzy sliding mode control system and the fuzzy control law is used to attenuate the chattering phenomenon. The bounds of uncertainties are not required to be known in advance for the presented AFSMC and the stability of the fuzzy control system is also guaranteed. Simulation results show that the proposed design approach can not only improve the tracking precision of the electromotive power loading for actuator, but also reduce the chattering around the sliding surface and external disturbance effectively.