国际设备工程与管理（英文版）2003，Vol.8Issue(4)：233-238,6.
Application of Wavelet Packet De-noising in Time-Frequency Analysis of the Local Wave Method
Application of Wavelet Packet De-noising in Time-Frequency Analysis of the Local Wave Method
LI Hong-kun 1MA Xiao-jiang 1WANG Zhen 1ZHU Hong1
作者信息
- 1. Institute of Vibration Engineering, Dalian University of Technology, Dalian 116024, P.R.China
- 折叠
摘要
Abstract
The local wave method is a very good time-frequency method for nonstationary vibration signal analysis. But the interfering noise has a big influence on the accuracy of time-frequency analysis. The wavelet packet de-noising method can eliminate the interference of noise and improve the signal-noise-ratio. This paper uses the local wave method to decompose the de-noising signal and perform a time-frequency analysis. We can get better characteristics. Finally, an example of wavelet packet de-noising and a local wave time-frequency spectrum application of diesel engine surface vibration signal is put forward.关键词
local wave/time-frequency analysis/wavelet packet/De-noising/signal-noise-ratioKey words
local wave/time-frequency analysis/wavelet packet/De-noising/signal-noise-ratio分类
机械制造引用本文复制引用
LI Hong-kun,MA Xiao-jiang,WANG Zhen,ZHU Hong..Application of Wavelet Packet De-noising in Time-Frequency Analysis of the Local Wave Method[J].国际设备工程与管理（英文版）,2003,8(4):233-238,6.
