汽车高压继电器粘连失效故障树分析

Automotive High-Voltage Relay Adhesion Failure Fault Tree Analysis

针对电动汽车高压继电器粘连失效故障现象,采用故障树分析法(FTA)进行相关可靠性分析。通过分析高压继电器所在电气系统,建立继电器粘连失效故障树模型,对其进行定性及定量分析。最后求解故障树最小割集及顶事件故障概率,并依据重要度分析找出引起粘连失效的薄弱环节。

In view of the electric vehicle high-voltage relay adhesion failure phenomenon,Fault Tree Analysis(FTA)is used to perform the relevant reliability analysis.By analyzing the electrical system in which the high-voltage relay is located,a relay Adhesion failure fault tree model is built to analyze it qualitatively and quantitatively.Finally,the minimum cut set of the fault tree and the top event failure probability are solved,and the weak links causing the adhesion failure are identified based on the importance analysis.