Extraction of instantaneous characteristics of nonstationary signal using harmonic wavelet transforms

被引：3
|
作者：
Zhu, Hongjun [1 ]
机构：
[1] College of Manufacturing Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
来源：
Jixie Gongcheng Xuebao/Chinese Journal of Mechanical Engineering | 2008年 / 44卷 / 05期
关键词：
Fourier transforms - Vibrations (mechanical);
D O I：
10.3901/JME.2008.05.191
中图分类号：
学科分类号：
摘要：
The instantaneous characteristics of non-stationary signal are analyzed. Then non-stationary signal are transformed by using harmonic wavelet, and the relation between the wavelet coefficient and the instantaneous characteristics of non-stationary signal are introduced. The principle and method of the accurate extraction for the instantaneous characteristics of non-stationary signal by using harmonic wavelet transforms are presented. Examples of application demonstrate that this method presented can effectively extract the instantaneous characteristics of special components in the non-stationary signal and has high precision and good noise resisting ability. This method can realize simple and quick algorithm through Fourier transform, and real-time analysis of instant taneous characteristics of non-stationary signal.
引用
收藏
页码：191 / 195
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