噪声与振动控制

噪声与振动控制 ›› 2012, Vol. 32 ›› Issue (4): 140-144.DOI: 03969/j.issn.1006-1355-2012.04.031

• 6.信号处理与故障诊断 • 上一篇    下一篇

小波变换在履带车辆振动信号处理中的应用

吕唯唯 ， 顾 亮 ， 黄雪涛   

  1. （ 北京理工大学 机械与车辆工程学院， 北京 100081 ）
  • 收稿日期:2011-09-29 修回日期:2011-11-11 出版日期:2012-08-18 发布日期:2012-08-18
  • 通讯作者: 吕唯唯

Application of Wavelet Threshold Method in Processing Tracked Vehicle Vibration Signal

LV Wei-wei，GU Liang，HUANG Xue-tao   

  1. ( Machinery and Vehicle Engineering Institute, Beijing Institute of Technology, Beijing 100081, China )
  • Received:2011-09-29 Revised:2011-11-11 Online:2012-08-18 Published:2012-08-18

摘要： 为解决履带车辆振动信号受强噪声信号干扰的影响，运用小波变换原理，根据重构因子比较几种小波基，确定适合履带车辆振动信号的小波基和阈值，描述小波分层方法，对履带车辆振动信号进行去噪。仿真计算结果表明小波变换去噪方法能有效地抑制背景噪声,提取有用状态信息，提高信噪比和减小均方误差，为履带车辆振动信号预处理提供一种可行的方法。

关键词: 振动与波, 小波变换, 履带车辆, 振动信号, 去噪

Abstract: n order to avoid an interference of strong noise to tracked vehicles vibration signal, using wavelet transform, several wavelet bases was compared according to reconstruction factors, then an appropriate wavelet base and threshold to processing vibration signals of tracked vehicles were determined, the wavelet layered method was described The simulation result indicated the wavelet transformation de-noising method can suppress the background noise effectively, extract useful state information, enhance the signal-to-noise ratio, reduce mean-square error and recover the interest weak signal buried in intensive background noise.

Key words: Iibration and wave, wavelet transform, tracked vehicles, vibration signal, de-noising

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