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An active control method based on the proportional-derivative (PD) feedback control strategy using an active magnetic actuator (AMA) is proposed for suppressing rotor vibration caused by rotor unbalance. The control current of the AMA is adjusted according to the real-time displacement of the rotor through the PD feedback algorithm to produce an electromagnetic force to reach the vibration response reduction of the unbalanced rotor. The motion equation of the rotor-bearing AMA system is established and transformed into a state equation for designing a control strategy based on the PD feedback. Finally, the test rig is set up and the verifications of simulation and experiment are carried out. The simulation and experimental results show the effectiveness of the proposed method for the suppression of the rotor unbalance vibration.

Unbalanced Vibration Response Reduction of Rotor Using Active Magnetic Actuator Based on PD Control