摘要
分析了小波变换的特点，提出改进Ｍｏｒｌｅｔ小波变换方法，可进一步提高Ｍｏｒｌｅｔ小波变换的“聚焦”特性。给出了计算验证实例，并应用于冷冻机振动信号分析，解决了一般信号处理技术无法识别的难题。
The characteristics of wavelet transform are analyzed and a modified version of the Morlet wavelet transform is proposed in this paper.It is proved through a numerical example that the modified Morlet wavelet transform could improve temporal resolution and spectral resolution of Morlet′s wavelet transform.
出处
《振动工程学报》
EI
CSCD
1997年第2期208-212,共5页
Journal of Vibration Engineering
关键词
故障诊断
信号处理
小波变换
时频分析
fault diagnosis
signal processing
wavelet transform
time frequency distribution
