作者：翁梁锋, 林建辉

作者单位：西南交通大学牵引动力实验室, 四川 成都 610031

关键词：轨道不平顺; 小波变换; 谐波小波; 微弱信号

摘要：

在强干扰的背景下,利用小波变换,提取出低频的轨道不平顺信号。为了能确切地反映出轨道不平顺信号,分别比较使用了Daubechies类小波,Meyer类小波与谐波小波,并对分析的结果作对比说明。结果表明,谐波小波变换可成功地提取到了轨道不平顺信号。

Track irregularity analysis based on wavelet transform

WENG Liang-feng, LIN Jian-hui

National Traction Power Laboratory, Southwest Jiaotong University, Chengdu 610031, China

Abstract: According to the characteristics that track irregularity is focus on the low frequency-band,data is reconstructed based on the wavelet transform,and some interferon is removed.In order to guarantee the reliability of the result,the Daubechies,the Meyer and the Harmonic wavelet families are employed to make a compare.The result indicated that the desired track irregularity could be extracted with the help of the harmonic wavelet function effectively.

Keywords: Track irregularity; Wavelet transform; Harmonic wavelet; Weak signal

2006, 32(1): 62-63,79  收稿日期: 2004-12-29;收到修改稿日期: 2005-3-12

基金项目: 

作者简介: 

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