Abstract
This paper presents a novel modeling method and a control system design procedure for a flexible rotor with many elastic modes using active magnetic bearings. Stable levitation of the rotor is achieved by using simplified flexible rotor-Active Magnetic Bearings system model, a designed local jerk feedback control system, and a phase-lag compensator. But the 2nd mode was not enough suppressed. In order to suppress the 2nd mode, change of the shape of the rotor and verification of its effectiveness are carried out. The target of our research is to let the rotor rotate passing over the 1st and the 2nd critical speeds caused by flexible modes.
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