Abstract: The automatic real time balancing of rotor at working speed by active magnetic actuator is studied. The algorithm of on-line automatic identification and attenuation for unbalance vibration are deduced. The method presented is applied in a rotor system supported by 'ball bearings. The experiment results confirm that the unbalancing vibration of rotor in working rotational frequence is greatly extenuated by using above method and device.

Key words: Active magnetic actuator, Automatic real time balancing, Rotor Identification of unbalance