基于扩展卡尔曼滤波的磁悬浮轴承刚度阻尼辨识

摘要

提出一种磁悬浮轴承刚度阻尼的测量方法，通过对转子施加不平衡质量激励，利用扩展卡尔曼滤波算法识别出磁悬浮轴承的刚度和阻尼。仿真研究表明，此方法可有效测量磁悬浮轴承刚度阻尼。经过试验辨识出使用的磁悬浮试验台的支承参数，并将辨识结果带回到仿真文件中进行验证对比，结果表明，可有效辨识出磁悬浮轴承的刚度阻尼参数。%An identify measurement of stiffness and damping to AMB system is introduced.By ap-plying unbalance excitation to the rotor,stiffness and damping can be identified use extended Kalman filter (EKF ) algorithm.The simulation result shows that it is efficient for this method to measure the stiffness and damping of AMB.Then used the method to identify the supporting parameters in experiment and brought the identified results to simulate files to compare the displacement re-sponse.The results indicated that the EKF method can efficiently identify the stiffness and damping.