Second order sliding mode control design for active magnetic bearing system

Tác giả: Huynh V.V. and Hoang B.D.

Abstract: This paper presents a new second order sliding mode control to stabilze a five-degree-of-freedom (DOF) active magnetic bearing (AMB) system. The new single phase sliding surface is introduced first. Then, the continous sliding mode controller is designed to relax the chattering problems in the control input. Furthermore, since the control characteristics of the five-DOF AMB are highly non-linear and time varying, the continous sliding mode controller is proposed to further improve the control performance and increase the robustness of the five-DOF AMB system. Finally, the performance of the controller applied to the five-DOF AMB model is demonstrated through simulation works under various rotational speeds and system conditions.