冲击振动提取的优化稀疏表征方法

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摘要针对在背景噪声及其他振动干扰下冲击振动信号提取问题，提出了一种利用基追踪实现冲击振动优化稀疏表征的方法。建立了冲击振动提取的稀疏求解问题模型，设计了用于冲击振动特征提取的变换基，并利用特征谱线在频谱中所占能量比作为评价冲击振动提取效果的指标，实现了冲击振动成分的优化提取。将该方法用于仿真试验和齿轮故障诊断，结果表明，与Morlet小波软阈值方法相比，本文所提方法能更好地提取微弱周期性冲击成分，具有很好的应用前景。

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关键词 ：稀疏求解, 基追踪, 变换基, 齿轮故障, 特征提取

Abstract：Aiming at the problem of impact vibration signals extraction under the strong back-ground noise and other vibration interference, an optimized sparse representation method of impact vibrations based on basis pursuit is proposed. A sparse solution problem for extracting impact vibrations is built, and a transform basis for impact feature extraction is designed. Then the energy ratio of characteristic spectral lines in the whole frequency spectrum is proposed for evaluating the effect of impact feature extraction, and the impact vibration components can be optimally obtained with this evaluation index. The proposed method is applied to simulation test and gear fault diagnosis, and the results show that this approach can better extract the weak periodic impacts, so it has great practical value.

Key words： sparse solution basis pursuit transform basis gear fault feature extraction

收稿日期: 2014-10-22 出版日期: 2015-12-25

引用本文:

秦毅1 郭磊1 吴宏钢2. 冲击振动提取的优化稀疏表征方法[J]. 振动与冲击, 2016, 35(1): 54-58.
QIN Yi1, GUO Lei1, WU Honggang2. Optimized sparse representation method of impact vibrations extraction. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(1): 54-58.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2016/V35/I1/54

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