Vibration control for active magnetic bearing high-speed flywheel-rotor system with inverse system method and two-degree-of-freedom PID control

In the high-speed flywheel energy storage system, the high ratio of the polar to transverse mass moments of inertia of the flywheel rotor and the high operating speed will result in a significant coupled effect. It is not easy to apply normal PID control method in active magnetic bearing (AMB) high-speed flywheel-rotor system for its coupling characteristic. In order to improve the coupled performances of this system, a control strategy that combines inverse system method and two-degree-of-freedom PID control is proposed in this paper. After introducing the model of an AMB high-speed flywheel-rotor system, the decoupling and interference rejection capabilities are simulated. The results show that with by means of the control strategy proposed, the system with strong gyroscopic effect in the high rotating speed region is decoupled and both the static and dynamic performances are greatly improved. An experiment has been done to verify the feasibility of the control strategy proposed.