Design Method of Filter Cross Feedback Controller for Nutation Mode Suppression of AMBs-Rotors

This paper explores a design method of the filter cross-feedback for nutation mode suppression of AMBs-rotor systems. The derivation of a multiple-input-multiple-output model (MIMO model) about AMBs-rotor was presented. Then the nutation stability of the system is analyzed by the complex coefficient method. Because the filter cross- feedback is an additive compensation, we can get the desired compensation by analyzing the Nyquist diagram of the system. At last, the filter cross-feedback controller is designed according to the compensation value. Simulation and experimental results demonstrate that the filter cross-feedback designed by the proposed method works well for restoring the stability of the system.