Adaptive notch filter based on Lorentz force magnetic bearing for the suppression of imbalance vibration

摘要

This study proposes an adaptive control approach based on Lorentz force magnetic bearing (LFMB) for the suppression of imbalance vibration in a magnetically suspended control and sensitive gyro (MSCSG). The mathematical model of the imbalance vibration in LFMB-rotor system with the proportional-integral-derivative (PID) plus filters cross feedback control law is firstly established. Due to the synchronous characteristics of the rotor imbalance disturbance and the linear characteristics of the LFMB, an adaptive notch filter based on LFMB is then proposed to plug into the LFMB-rotor controller to eliminate synchronous disturbance. Finally, experimental results demonstrate the capability of the proposed method to suppress rotor imbalance vibration.