Gain Scheduled Adaptive Vibration Control

A new method for the reduction of either the vibration or AMB current induced by rotor imbalance is presented. The approach is based on previous research on Adaptive Vibration Control for active magnetic bearing systems. To minimize the memory and computational requirements imposed on the hardware, the gain matrix used is synthesized as functionally dependent upon the operating speed with only the diagonal elements varying linearly with speed. The resulting algorithm was experimentally tested on a high-speed spindle. Significant reductions in bearing currents were achieved over a wide range of operating speeds.