连续小波变换在滚动轴承故障诊断中的应用

针对滚动轴承故障振动信号的特点，构造脉冲响应小波，采用连续小波变换的方法来提取滚动轴承故障振动信号的特征，在此基础上提出了两种滚动轴承故障诊断方法：尺度——小波能量谱比较法和时间——小波能量谱自相关分析法。通过对滚动轴承外圈和内圈故障振动信号的分析，说明两种方法不仅能检测到滚动轴承故障的存在，而且能有效识别滚动轴承的故障模式，从而为滚动轴承故障诊断提供了一种新途径。

Application of Continuous Wavelet Transform to Fault Diagnosis of Rolling Bearings

A new way is offered for rolling bearingfault diagnosis. The impulse response wavelet was con-structed to extract the vibration signal characteristics ofrolling bearings with faults by using continuous wavelettransform. Two methods named scale--wavelet powerspectrum comparison and auto--correlation analysis oftime--wavelet power spectrum are proposed. Applyingthese two methods to vibration signal of rolling bearingswith out--race faults or inner--race faults, it is con-firmed that the faults in rolling bearings can be detectedand fault patterns can be identified successfully.