基于自适应滑模观测器的新能源汽车驱动系统电流传感器微小故障诊断  

Minor Fault Diagnosis for Current Sensor of New Energy Vehicle Drive System Based on Adaptive Sliding Mode Observer

作　　者：许水清 刘锋 何怡刚[1] 胡友强 柴毅[2] XU Shuiqing;LIU Feng;HE Yigang;HU Youqiang;CHAI Yi(College of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,Anhui Province,China;State Key Laboratory of Power Transmission Equipment and System Security and New Technology(Chongqing University),Shapingba District,Chongqing 400044,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽省合肥市230009 [2]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市沙坪坝区400044

出　　处：《中国电机工程学报》2023年第18期7277-7287,共11页Proceedings of the CSEE

基　　金：国家自然科学基金(重点项目)(U2034209);国家自然科学基金(面上项目)(51977153);中国博士后科学基金面上项目(2020M682474)。

摘　　要：为及时准确地检测出新能源汽车永磁同步电机驱动系统电流传感器微小故障,该文提出一种基于自适应滑模观测器的微小故障诊断方法。该方法首先构建含有电流传感器微小故障的驱动系统混合逻辑动态模型,其次利用状态增广和非奇异坐标变换对电流传感器微小故障进行故障重构,然后设计收敛速度快且能够抑制高频抖振的自适应滑模观测器以精确估计系统重构状态,最后采用系统重构状态实际值与观测值残差作为检测变量并利用范数设计自适应阈值。该文提出的方法不仅能诊断微小故障和显著故障,而且可以检测从微小故障演变为显著故障乃至失灵的整个过程,准确性高、鲁棒性强。实验结果验证了所提诊断方法的准确性和鲁棒性。In order to detect the minor fault of the current sensor in the permanent magnet synchronous motor(PMSM)drive system of new energy vehicle timely and accurately,a minor fault diagnosis method based on adaptive sliding mode observer is proposed in this paper.First,the hybrid logic dynamic model of the drive system with minor fault of current sensor is constructed,and then the fault reconstruction of minor fault of current sensor is carried out by using state augmentation and nonsingular coordinate transformation.In addition,an adaptive sliding mode observer with fast convergence and high-frequency chattering suppression is designed to accurately estimate the reconstructed state of the system.Finally,the residual between the actual value and the observed value of the system reconstruction state is used as the detection variable,and the norm is used to design the adaptive threshold.The method proposed in this paper can not only diagnose minor fault and obvious fault,but also detect the whole process from minor fault to fault and even failure,with high accuracy and strong robustness.The experimental results verify the accuracy and robustness of the proposed diagnosis method.

关 键 词：永磁同步电机驱动系统 电流传感器 微小故障 自适应滑模观测器 自适应阈值 

分 类 号：U469[机械工程—车辆工程]