一种磁悬浮径向轴承内部电磁力自动控制方法  

An automatic control method of internal electromagnetic force of magnetic levitation radial bearing

作　　者：杨智玲 YANG Zhi-ling(Xiamen Vocational College Of Ocean Technology,Xiamen 361100 China)

机构地区：[1]厦门海洋职业技术学院海洋机电工程学院,福建厦门361100

出　　处：《新余学院学报》2023年第1期29-34,共6页Journal of Xinyu University

基　　金：2021年度福建省中青年教师教育科研项目(科技类)“四旋翼无人机在智慧渔业中的应用研究”(JAT210809)。

摘　　要：传统的径向磁轴承内部的电励磁磁路存在耦合缺陷,导致径向磁轴承的运行稳定性偏低。针对这一问题,提出一种磁悬浮径向轴承内部电磁力自动控制方法。在分析轴承内部结构的基础上,根据等效磁路理论构建磁轴承模型,从而得到其内部的电流刚度及位移刚度。为有效避免磁轴承发生偏移,采用有限元法降低定子磁极对转子的干扰力矩,并利用磁轴承定子转矩生成的陀螺力矩和重力运算获取系统各个参数值。最后,运用解耦控制法对输出与控制变量实施解耦,消除耦合现象,达到最优控制效果。实验结果表明:磁悬浮径向轴承内部电磁力自动控制方法具有较高的准确性和鲁棒性,能够实现对轴承内部电磁力的有效控制。There are coupling defects in electric excitation magnetic circuit of traditional radial magnetic bearing,which leads to the low stability of radial magnetic bearing.To solve this problem,an automatic control method of internal electromagnetic force of magnetic levitation radial bearing is proposed.Based on the analysis of the internal structure of bearings,a magnetic bearing model is established according to the equivalent magnetic circuit theory,so as to obtain the internal current stiffness and displacement stiffness.In order to effectively avoid the magnetic bearing deviation,the finite element method is used to reduce the interference torque of stator pole to the rotor,and the gyroscope torque generated by the stator torque of magnetic bearing and gravity calculation are used to obtain the system parameters.Finally,the decoupling control method is used to decouple the output and control variables to eliminate the coupling phenomenon and achieve the optimal control effect.The experimental results show that the automatic control method of internal electromagnetic force of magnetic suspension radial bearing has high accuracy and robustness,and can effectively control the internal electromagnetic force of bearing.

关 键 词：磁悬浮径向轴承 电磁力自动控制 有限元法 解耦控制法 

分 类 号：TH133.3[机械工程—机械制造及自动化]