主动磁轴承系统的滑模控制设计

Sliding Mode Control for Active Magnetic Bearing

主动磁轴承具有无摩擦、无磨损、无需润滑、无污染、寿命长等优点,在高速运动场合、低速洁净场合都有广泛的应用前景.力求解决目前主动磁轴控制系统的非线性问题,提出了主动磁轴承系统的滑模控制,该方法使得磁悬浮轴承系统的鲁棒性和稳定性进一步提高.首先介绍了磁轴承系统的结构和工作原理,建立了主动磁轴承的系统方程.其次,对滑模控制进行具体分析,并讨论了滑模控制的可达条件和其稳定性分析.仿真结果表明,滑模控制器具有良好的鲁棒性和快速性,基本满足磁轴承系统实时控制的要求.

Active magnetic bearing has the advantages, such as frictionless, lossless, lubrication-free, pollution-free and long life and so on. It has potential application prospects in occasions where moving with high-speed movement andcleaning with low speed. To solve nonlinear problem with the control system of active magnetic bearing, a sliding mode control of active magnetic bearing system is proposed. This approach further improves the robustness and stability of the the control system of active magnetic bearing. In this paper, firstly, the structure and working principle ofbearing system are introduced. Secondly,the sliding mode control is analyzed in detail. And the arrival condition ofsliding mode control and its stability analysis are introduced. The results of simulation show that the sliding modecontroller has better robustness and rapidity, and that it meets the requirements of real time control for magnetic bearingsystem basically.