【摘要】 在机械设备的在线检测和故障诊断中 ,振动信号分析是十分重要的手段。包含在振动信号中的突变信号是重要的特征信息。小波分析在在线检测和故障诊断中已逐渐得到了广泛的应用。但采用不同的小波基 ,分析结果有很大的差异。笔者通过对小波基时频特性进行分析比较并结合故障分析实例和仿真结果 ,总结了选择合适小波基的一些方法。更多还原

【Abstract】 The application of wavelet analysis in fault diagnosis is growing rapidly.There are many different wavelet base to use but no accepted procedure for choosing among them, the analysis results by using them have great difference. This paper describes the significant properties of wavelet base, and analysis behavior of transient signal in wavelet transform, result on some methods for how to choose wavelet base in analysis transient signal.更多还原