Synchronous vibration control for magnetically suspended flywheel by a robust resonant controller

Abstract

This paper presents an adaptive and robust control method to suppress the synchronous vibration forces for a magnetically suspended flywheel (MSFW) while keep the rotor stable suspension in the presence of the time-varying frequency disturbance. The proposed synchronous micro-vibration suppression method not only eliminates the synchronous current fluctuations to force the rotor spinning around the inertia axis, but also considers the residual synchronous vibration forces compensation in the displacement stiffness. Moreover, the stability of the proposed control system is exactly analyzed by using small gain theorem. The vibration forces of the MSFW in its full operational speed are directly tested to demonstrate the effectiveness of the proposed method.