Data-driven identification of fault root causes

A method of diagnosing a fault includes receiving a signal from a component of a vehicle system, the received signal indicating a symptom of a fault in the vehicle system, and acquiring a set of test signals. The method further includes comparing the received signal with each test signal to determine at least one observability distribution, the observability distribution including observability values for each test signal, and determining a failure mode corresponding to the received signal based on the observability distribution. The determined failure mode represents a root cause of the symptom. 一种诊断故障的方法包括从车辆系统的部件接收信号，接收的信号指示车辆系统中的故障的症状，并获取一组测试信号。该方法还包括将接收信号与每个测试信号进行比较以确定至少一个可观测性分布，该可观测性分布包括用于每个测试信号的可观测性值，并基于该可观测性分布确定对应于接收信号的故障模式。所确定的故障模式代表症状的根本原因。