Vibration suppression for rotor system of magnetic suspended wind turbines using cross-feedback-based sliding mode control

This paper proposed a novel method which is the combination of traditional cross feedback control and sliding mode control for the problem of gyroscopic coupling and imbalance disturbance in the rotor system of magnetic suspended wind turbines when they rotate under high speed situation. Firstly, the mathematical model of a radial four-degree-of-freedom active magnetic bearing rotor system is derived. Then, a sliding mode controller is designed after decoupling the model by using cross feedback control method. The stability of the whole system is guaranteed by the Lyapunov stability theory. Better robustness and regulation performance is obtained through comparing with a traditional decentralized PID-based cross feedback controller numerically.