弾性ロータ・磁気軸受系のH^∞制御

概要

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This paper deals with a flexible rotor-magnetic bearing system which has three concentrated masses. A mathematical model of the flexible rotor in the case of the free-free condition is derived using the finite-element method. Then we derive the reduced order model for control system desigh by eliminating higher order modes of the mechanical and electromagnetic interaction system (full-order model) beyond the first flexible mode. With the use of the solution of H^∞ output feedback control, the H^∞ central controller is designed. Control performance based on the mixed sensitivity problem is compared with that based on the robut stability. Simulations are performed on the calculating model. The two unstable rigid modes can easily be controlled as stable and the first flexible mode is better controlled than before control by the H^∞ controller. The spillover phenomena of the higher order modes are not generated. Also, it is clear that the H^∞ control desigh is robust to the variation in the parameters of the model.
一般社団法人日本機械学会の論文
1992-09-25