阶比谱分析与汽车起动电机故障的实时诊断

本文主要论述阶比谱分析方法及其在汽车起动电机故障实时诊断中的应用。首先阐述了阶比谱分析的原理以及阶比采样中混迭与泄漏的产生及其抑制方法，然后讨论了如何在起动电机运行过程短、升速快的情况下获取感兴趣的噪声信号，进而采用阶比谱分析方法从信号中提取故障特征信息，最后利用阀值判别法起动电机的故障进行实时诊断。

The Order Ratio Spectrum Analysis and the Realtime Fault Diagnosis of the Car-Starters

This paper mainly treats the order ratio spectrum analysis (ORSA) and its application to the realtime fault diagnosis of the car-starters. First, it elaborates the principle of the ORSA and the way of generating and the method of being restrained to the aliasing and leakage in the process of order ratio sampling.Then the paper discusses how to acquire the interested noise signals in the short working process of the carstarters with the rapid acceleration,and hwo to extract the information of their fault features from the signals in accordance with the ORSA. Finally it diagnoses realtimely the faults of the car-starters by means of threshold judgement.