为实现对蓄电池车辆调速控制系统的故障诊断,建立故障树模型,通过定性分析寻找最小割集,并以模糊数理论为工具进行定量分析。利用该方法所得到的分析结果,可以方便地确定系统的薄弱环节,克服常规故障树分析法中概率难以精确赋值的缺点,为系统的故障诊断提供参考依据。 In order to realize the fault diagnosis of battery speed control system of vehicle, the fault tree model was established, and the minimum cut set was found through qualitative analysis. The quantitative analysis was carried out with the tool of fuzzy number theory. The analysis results obtained by this method can easily determine the weak links of the system and overcome the shortcoming of the difficulty of accurate assignment in the conventional fault tree analysis and provide a reference for the system fault diagnosis.