基于状态观测器的感应电机速度传感器故障诊断及容错控制

速度传感器是感应电机矢量控制系统的重要组成部分,当其出现故障时会严重影响系统的性能。设计感应电机矢量控制系统,并在此基础上实现了基于状态观测器的感应电机速度传感器故障诊断及速度传感器发生故障后的容错控制。在速度传感器正常时,状态观测器工作在故障诊断方式下;速度传感器发生故障后,该状态观测器工作在速度估计方式下,系统由原带速度传感器矢量控制方式平滑切换到无速度传感器矢量控制,从而实现速度传感器的容错控制。该设计的有效性在dSPACE实验平台上得到了验证。

Fault Diagnosis and Tolerant Control for Speed Sensors Based on State Observers in Induction Motor Drives

Speed sensor is an important part of induction motor vector control system,its fault can cause system degradation.Firstly,a vector controlled induction motor drive system is designed,and then a state observer based speed sensor fault diagnosis and its fault tolerant control are fulfilled.When the speed sensor is in healthy condition,the state observer works in a diagnosis mode;if faults occur in the speed sensor,it acts as a speed estimator.The control system smoothly switches from the vector control mode with a speed sensor to a speed sensorless vector control mode,so the speed sensor fault tolerant control scheme is established.Finally,the validation of this method has been proved on a dSPACE experimental platform.