| 小波包算法在柴油机振声征兆提纯中的应用 |
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| 引用本文： | 邹剑,陈进,耿遵敏.小波包算法在柴油机振声征兆提纯中的应用[J].上海交通大学学报,2002,36(2):217-221. |
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| 作者姓名： | 邹剑 陈进 耿遵敏 |
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| 作者单位： | 上海交通大学,振动、冲击、噪声国家重点实验室,上海,200030 |
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| 基金项目： | 国家自然科学基金资助项目 ( 5 9775 0 2 410 176 0 14 )，振动、冲击、噪声国家重点实验室开放基金资助项目
( VSN-2 0 0 2 -3 |
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| 摘 要： | 将小波包技术引入柴油机振声征兆提纯的应用研究中，分析了小波包分解得到的Paley列存在的频率混叠现象的原因，给出了相应的小波包移频算法，该算法可以极大地抑制信号中的噪声，提高信噪比，有效地提取出信号的特征参数，对190系列柴油机的实验研究表明：该算法在柴油机等往复机械振声征兆提纯及其动态诊断中具有工程有效性和实用性。
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| 关 键 词： | 小波包算法 柴油机 振声征兆 提纯 |
| 文章编号： | 1006-2467(2002)02-0217-05 |
Wavelet Packets Algorithm in Diesel Engines' Vibro-Acoustic Signatures Extraction |
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| ZOU Jian,CHEN Jin,GENG Zun min.Wavelet Packets Algorithm in Diesel Engines'' Vibro-Acoustic Signatures Extraction[J].Journal of Shanghai Jiaotong University,2002,36(2):217-221. |
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| Authors: | ZOU Jian CHEN Jin GENG Zun min |
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| Abstract: | The wavelet packets technique was introduced into the application research on diesel engines' vibro acoustic signatures extraction. The reason of the existence of frequency aliasing in the Paley series from wavelet packets' decomposition was analyzed, and the wavelet packets frequency shifting algorithm was given. The algorithm can reduce the noise significantly, heighten the signal to noise ratio and can effectively extract the desired parameter. The experiments on 190 serial diesel engines verify that the wavelet packets frequency shifting algorithm is applicable and available in reciprocating machines' vibro acoustic signatures extraction and vibration diagnosis. |
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| Keywords: | vibro acoustic signatures extraction wavelet packets diesel engines |
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