电动汽车的很多部件都包含滚动轴承,滚动轴承的运行状态往往影响电动汽车的运行性能。本文主要分析通过传感器采集到的轴承振动信号,先对振动信号的机理进行分析,然后举出几种从离散频率噪声中分离轴承信号的方法;再采取相关的方法提取有效的轴承振动信号的信息;最后总结电动汽车滚动轴承故障诊断方法。 Many parts of electric vehicles include rolling bearings, rolling bearings often affect the operating performance of electric vehicles. This paper mainly analyzes the bearing vibration signal collected by the sensor, analyzes the vibration signal mechanism first, and then gives several methods to separate the bearing signal from the discrete frequency noise; then take the relevant method to extract the information of the effective bearing vibration signal Finally, the fault diagnosis method of electric vehicle rolling bearing is summarized.