Complete Synchronous Vibration Suppression for a Variable-Speed Magnetically Suspended Flywheel Using Phase Lead Compensation

Abstract

The synchronous vibration rising from the magnetically suspended flywheel (MSFW) will drastically reduce the pointing precision of the satellites. In this paper, the high precision suppression for the frequency-varying synchronous vibration forces in the permanent-magnet-biased hybrid MSFW is investigated. First, the synchronous vibration forces generated in the permanent-magnet-biased hybrid magnetic bearing are modeled and analyzed. Then, a practical and effective synchronous vibration suppression method is proposed to plug into the baseline magnetic suspension system. The proposed method ascertains the overall system stability over the entire speed range by an adjustable phase angle. Moreover, it eliminates the residual synchronous vibration forces in the negative displacement stiffness by considering phase-lag influence of the power amplifier. The direct testing for the synchronous vibration forces proves the feasibility of the proposed suppression method.