转子圆度误差对四自由度AMB的稳定性影响  

Influence of the Roundness Error of Rotor on the Stability of the 4-DOF AMB

作　　者：丁翔宇 范启富[1] DING Xiangyu;FAN Qifu(School of Electronie Information and Flectrical Engineering.Shanghai Jiao Tong University,Shanghai 200240,China;Signifly China Holding B.V.,Shanghai 200233,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240 [2]昕诺飞(中国)投资有限公司,上海200233

出　　处：《测控技术》2023年第9期88-97,共10页Measurement & Control Technology

摘　　要：主动磁悬浮轴承(Active Magnetic Bearing, AMB)对转子的加工精度要求很高,圆度误差是转子加工中常见的误差,但是前人的工作中关于圆度误差影响的研究很少。建立了四自由度AMB的数学模型,分析了圆度误差对力-电流系数和力-位移系数的影响,推导了四自由度AMB的闭环特征方程。通过闭环特征方程的性质,分析了圆度误差对四自由度AMB稳定性的影响,通过仿真和实验验证了上述分析的正确性。研究结果表明,过大的圆度误差会使四自由度AMB系统不稳定,但通过选取合适的PID参数能够使系统恢复稳定。Active magnetic bearing(AMB)has high demand on the machining accuracy of rotor,roundness er-ror of the rotor is a common kind of machining error in rotor machining,but there is lttle research on the influ-ence of roundness error in previous work.The mathematic model of the 4-DOF AMB is built,the effects of roundness eror of the rotor on the force current sifness and force-displacement sifness are analyzed,and the close loop characteristic equation of the 4-DOF AMB is derived.Based on the close loop characteristic equa-tion,the influence of the roundness error on the stability of 4-DOF AMB is analyzed,the conclusions are veri-fied with simu lations and experiment results.The research results show that excessive roundness error will make the 4-D0F AMB systerm unstable,however the system can be stabilized by selecting proper PID parameters.

关 键 词：主动磁悬浮轴承 转子圆度误差 特征方程 PID参数 

分 类 号：TP271.4[自动化与计算机技术—检测技术与自动化装置]