離散時間スライディングモード制御による弾性ロータ・磁気軸受系の高速回転時特性

抄録

This paper is concerned the computer-based sliding mode control of a flexible rotor-magnetic bearing system. The reduced-order model for controller design is given by eliminating higher-order modes beyond the second flexible mode. A discrete-time sliding-mode controller for the reduced-order model is proposed, and its robust performances are evaluated in several rotational experiments up to 40000 rpm. The unstable modes can be easily controlled with good stability and the spillover phenomena due to the ignored higher-order modes are not generated. It is indicated that discrete-time sliding-mode control has robustness against the model parameter variations and external disturbances.