The invention discloses an analysis and test method for fault diagnosis of a vehicle control unit of an electric vehicle, and the method comprises the steps: S1, building a fault diagnosis analysis matrix set of the vehicle control unit according to the fault diagnosis data of the vehicle control unit under different working conditions; S2, obtaining fault feature data corresponding to each faultdiagnosis analysis matrix; S3, respectively establishing a fault subspace for each fault item in the preset fault items; S4, establishing a knowledge base of a corresponding relationship between the fault item and the effective fault feature data according to a fault analysis tree; S5, collecting fault detection data of the vehicle control unit to be analyzed; and S6, obtaining corresponding faultinformation of the fault data in the knowledge base through a table look-up method. Faults can be quickly found out through the fault tree reverse lookup table in the knowledge base, and safety guarantee is provided for the vehicle control unit, and powerful help is provided for real-time fault diagnosis of the vehicle in the running process of the vehicle.
本发明公开了一种用于电动汽车整车控制器故障诊断的分析与测试方法,包括步骤:S1,根据不同工况下的整车控制器的故障诊断数据,建立整车控制器的故障诊断分析矩阵集;S2,得到每个所述故障诊断分析矩阵对应的故障特征数据;S3,对所述预设的故障项中的每一项故障项分别建立故障子空间;S4,根据故障分析树,建立所述故障项与所述有效故障特征数据之间的对应关系的知识库;S5,采集待分析的整车控制器的故障检测数据;S6,通过查表法获取所述故障数据在所述知识库中对应的故障信息。可以迅速通过知识库中的故障树逆向寻表找出故障,为整车控制器提供了安全的保障。并且在车辆行驶中,对车辆的实时故障诊断提供了有力的帮助。
Analysis and test method for fault diagnosis of vehicle control unit of electric vehicle
一种用于电动汽车整车控制器故障诊断的分析与测试方法
2020-08-04
Patent
Electronic Resource
Chinese
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