Active control of multi-frequency vibration in rotor-bearings system through self-optimizing control

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (18) : 45-50.

Yao Jianfei, Gao Jinji, Wang Weimin

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Abstract

A approach is proposed for the control of rotor multi-frequency periodic vibration in rotor-bearings system with electromagnetic exciters through self-optimizing control. The control strategies have included arithmetic that optimized the amplitudes and phases of the control signals using an on-line self-optimizing algorithm and apply multiple frequency-matched control force that electromagnetic exciters generate to reduce the measured amplitudes of rotor. The model of rotor-bearings system with electromagnetic exciters is established firstly. An active vibration control scheme for controlling transverse vibration of the rotor due to multi-frequency excitation is designed. And the whole circle search algorithm about the phase of control current is proposed. Finally, the experiments for controlling multi-frequency vibration of the rotor were carried out on the rotor-bearings test rig. The experiment results indicate that the proposed method is effective in reducing rotor vibration arising from multi-frequency force.

Key words

Multi-frequency periodic vibration / Self-optimal control / Active magnetic bearing / Rotor-bearings system

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Yao Jianfei, Gao Jinji, Wang Weimin. Active control of multi-frequency vibration in rotor-bearings system through self-optimizing control[J]. Journal of Vibration and Shock, 2015, 34(18): 45-50

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