无轴承异步电机传感器故障容错控制  

Fault tolerant control for sensor fault of a bearingless asynchronous motor

作　　者：杨泽斌[1] 王丁 孙晓东[2] 孙超 吴家杰 Yang Zebin;Wang Ding;Sun Xiaodong;Sun Chao;Wu Jiajie(College of Electrical and Information Engineering,Jiangsu University,Zhenjiang 212013,China;Automotive Engineering Research Institute,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学电气信息工程学院,镇江212013 [2]江苏大学汽车工程研究院,镇江212013

出　　处：《仪器仪表学报》2021年第5期99-109,共11页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51475214,51875261);江苏高校优势学科建设工程项目(PAPD)资助。

摘　　要：为了避免转速和电流传感器故障对无轴承异步电机(BAM)矢量控制系统中转速环、电流环以及悬浮控制的影响,提出了一种无轴承异步电机传感器故障容错控制策略。首先,设计扩张观测器实现对无轴承异步电机转速及误差的观测,利用数据融合策略来实现故障时转速的平滑切换,再根据转速观测误差设计合理阈值实现速度传感器的故障诊断及容错。其次,根据状态方程实现电流的观测,同时利用扩张观测器补偿状态方程的观察扰动,再根据电流观测误差设计合理阈值实现电流传感器的故障诊断及容错。最后的仿真和实验结果表明,所提出的无轴承异步电机传感器故障容错控制系统能在0.025 s内准确的实现转速和电流的故障诊断及容错控制,且其误差分别在±63 r/min和58 r/min以内,此外整个过程转子位移波动幅度在±38μm以内,这表明转子能实现良好悬浮。In order to avoid the effects of speed and current sensor faults on the speed loop,current loop and suspension control in the vector control system of bearingless asynchronous motor(BAM),a fault-tolerant control strategy of the BAM sensor faults is proposed.Firstly,the extended observer is designed to realize the observation of the speed and error of the BAM,and the data fusion strategy is used to achieve smooth switching of the speed when the fault occurs.Then a reasonable threshold is designed to achieve fault diagnosis and fault tolerance of the speed sensor according to the speed observation error.Secondly,the current observation is realized according to the state equation,and the expansion observer is used to compensate the observed disturbance of the state equation.Then a reasonable threshold is designed to realize the fault diagnosis and fault tolerance of the current sensor according to the current observation error.Finally,the simulation and experiment results show that the proposed fault-tolerant control system for the BAM sensors can accurately achieve fault diagnosis and fault-tolerant control of speed and current within 0.025 s,and the errors are within±63 r/min and 58 r/min,respectively.In addition,the rotor displacement fluctuation amplitudes are within±38μm throughout the process,which indicates that the rotor can achieve good suspension.

关 键 词：无轴承异步电机 速度观测器 电流观测器 故障诊断 故障容错控制 

分 类 号：TM343[电气工程—电机] TH165.3[机械工程—机械制造及自动化]