混合径向磁轴承非对称位移传感器容错控制  

Fault-tolerant control of asymmetric displacement sensor for hybrid radial magnetic bearing

作　　者：刘程子[1] 王加伟 杨艳[1] 刘泽远[1] LIU Cheng-zi;WANG Jia-wei;YANG Yan;LIU Ze-yuan(College of Automation&College of Artificial Intelligence,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学自动机学院、人工智能学院,南京210023

出　　处：《电机与控制学报》2021年第9期78-85,共8页Electric Machines and Control

基　　金：国家自然基金青年基金(GZ216050);江苏省自然科学基金青年基金(SJ216049)。

摘　　要：针对混合径向磁轴承用的位移传感器容易发生故障可靠性不高的问题,依据冗余位移传感器检测思路,采用坐标变换矩阵技术,提出一种位移传感器的故障识别与容错控制方法。通过将位移传感器非对称安装在混合径向磁轴承的外围,根据位移传感器的故障状态选取不同的坐标变换矩阵,实现转子在水平和竖直两个自由度上的位移检测。传感器位置的非对称安装降低了由于传感器数量增加而引起的电磁干扰影响并且提高了容错能力,对冗余位移传感器最优安装位置的分析提高了传感器可检测范围,能够实现4种传感器故障状态的容错控制。通过在两对极混合径向磁轴承系统中的仿真验证,表明所述方法能够有效、快速实现位移传感器的容错控制,具有结构简单、容错能力高和适用范围广的优点。Aiming at the problem that the displacement sensor used in hybrid radial magnetic bearing is prone to fail and its reliability is not high,a fault identification and fault-tolerant control method for displacement sensor was proposed based on the idea of redundant displacement sensor detection and the coordinate transformation matrix technology.By installing the displacement sensor asymmetrically on the periphery of the hybrid radial magnetic bearing and selecting different coordinate transformation matrix according to the fault state of the displacement sensor,the displacement detection of the rotor on both horizontal and vertical degrees of freedom was realized.The asymmetric installation of the sensor position reduces the influence of electromagnetic interference caused by the increase of the number of sensors and improves the fault-tolerant capability.The analysis of the optimal installation location of the redundant displacement sensor improves the detectible range of the sensor,and the fault-tolerant control of four sensor fault states can be realized.The simulation results of a two-pole hybrid radial magnetic bearing system show that the proposed method can effectively and rapidly realize the fault-tolerant control of the displacement sensor,and has the advantages of simple structure,high fault-tolerant ability and wide application range.

关 键 词：径向磁轴承 位移传感器 故障识别 容错控制 坐标变换 非对称位置 

分 类 号：TM930.3[电气工程—电力电子与电力传动]