电磁轴承的主动控制研究

Research on Active Control of Magnetic Bearings

鉴于磁力轴承本质上是不稳定的，因而引入闭环主动控制后的主动型电磁轴承（简称电磁轴承），就成为人们关注和研究的重点．本文在介绍电磁轴承工作原理的基础上分析和给出了单自由度磁悬浮系统的数学模型及相应的闭环控制方块图．结合一个设计实例，给出了确定控制器参数的稳定范围的方法，并讨论了控制器参数对电磁轴承系统动态参数的影响等．

Seeing that the essential instability of magnetic suspensions,researchers in this field focus their study and show extraordinary in terest on active magnctic bearings(AMBS)applying active control with feedback. Based on brief description of the principle of AMBS,the mathemateal model and block diagram of the close loop control system of a suspension system of One degree offreedom have been given in the paper,and the proce-dure ofdefining stability margin of parameters of the controller is presented as well.Their influcnce on the dynamic performance of the AMB-rotor system and several othcr items have been discussed in the same time.