A HIGH-PERFORMANCE CONTROL SCHEME FOR STABILIZATION OF ACTIVE MAGNETIC BEARING SYSTEM

Yi-Fei Yang ； Chun-Hua Sun ； Hong-Bin Wang

《電機工程學刊》 26卷6期 (2019/12) Pp. 229-236

https://doi.org/10.6329/CIEE.201912_26(6).0002

摘要

Among all the control algorithms of active magnetic bearing (AMB) system, PID controller is an important control method. This article introduced a methodology of finding all the stabilizing parameter set of PID controllers for AMB with time-delay by satisfying a robust performance constraint. The H-infinity index of additive weight uncertainty on the basis of robustness stability condition of closed loop system was first given by small gain theorem. Then, the parameter boundaries with the expected decay ratio index of PID controller were derived based on the boundary crossing theorem. The system can be stabilized and robustly satisfy the performance requirements by arbitrary choosing PID controllers parameter in the stability region. The proposed method reduced the difficulty of stability regions of PID parameters for AMB with time-delay system. Simulation and experimental results showed that the design method was effective.

關鍵字

magnetic bearing ； time delay ； H-infinity index ； stability region of controller parameters