Adaptive Backstepping Control of Active Magnetic Bearings with Slice Rotor

Purpose In order to improve the levitation performance and robustness of the active magnetic bearings with slice rotor, an adaptive backstepping control method is studied. Methods An adaptive backstepping control algorithm is designed and guarantees system stability through the Lyapunov theorem. To further increase the anti-interference performance of the system, the adaptive law is designed to estimate the external disturbance and eliminate it in the control process. Results To examine the effect of the proposed control method, the adaptive backstepping control, the backstepping control, and the proportional-integral-derivative control methods are applied to the slice rotor active magnetic bearings, and the floating and anti-interference simulations and experiments are conducted. Simulation and experimental results indicate that the adaptive backstepping control method not only has better anti-interference performance but also has a shorter adjustment time than the proportional-integral-derivative control and more energy efficient than the backstepping control method. Conclusion Therefore, the adaptive backstepping control method can improve the robustness and dynamic performance of the active magnetic bearing system.