电磁悬浮轴承刚度和阻尼设计

Design of Electromagnetic Bearing Stiffness and Damping

建立了电磁悬浮轴承的力学模型 ,对具有不平衡的转子的振动进行了控制分析。由于电磁悬浮轴承具有可控刚度和阻尼特性 ,因此可利用等效刚度和等效阻尼概念选择控制系统参数 ,简化设计过程。对一实例进行了具体分析 ,证实这种方法可行。分析结果还表明 ,若控制参数选择合理 。

The mechanical model of an electromagnetic bearing used for controlling the vibration of a rotor with mass unbalance is established. Because of the electromagnetic bearing having the characteristics such as controllable stiffness and damping, the parameters of its control system can be selected through the use of the concepts such as equivalent stiffness and damping. Thus, the design process can be simplified. The feasibility of the design method is verified by means of a concrete analysis to an example. In addition, the analysis results show that the good properties of the electromagnetic bearing in vibration control can be reached when thecontrol parameters are selected rationally.