| 基于CEEMD-参数优化Morlet小波变换的柴油机振动信号冲击特征提取方法 |
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| 引用本文： | 梁仲明,滕宪斌,杨期江,朱发新.基于CEEMD-参数优化Morlet小波变换的柴油机振动信号冲击特征提取方法[J].船舶工程,2020,42(5):90-96. |
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| 作者姓名： | 梁仲明 滕宪斌 杨期江 朱发新 |
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| 作者单位： | 浙江海洋大学 港航与交通运输工程学院,广州航海学院 轮机工程学院,广州航海学院 轮机工程学院,浙江海洋大学 港航与交通运输工程学院 |
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| 基金项目： | 广东省自然科学基金项目（2018A030310017）；广州市科技计划项目（201904010133）；浙江海洋大学2019年度校级大学生创新训练计划项目（学术论文类）(xj2019053)。 |
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| 摘 要： | 针对船舶柴油机振动产生的非平稳信号，提出一种基于完备的总体平均经验模态分解（complementary ensemble empirical mode decomposition, CEEMD）与参数优化Morlet小波分析相结合的振动信号特征提取方法。利用CEEMD方法对振动信号进行分解，在分解出的各种分量中，去掉无用的周期成分分量，保留含有冲击特征的分量，然后结合参数优化Morlet小波分析方法，根据Morlet小波与冲击信号的相似性，将冲击成分提取出来。通过仿真信号以及柴油机振动信号的应用分析验证了该方法对柴油机振动信号冲击特征提取的有效性。
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| 关 键 词： | 船舶柴油机 振动 非平稳信号 CEEMD Morlet小波 |
| 收稿时间： | 2019/12/11 0:00:00 |
| 修稿时间： | 2020/5/15 0:00:00 |
Diesel Engine Vibration Signal Impact Feature Extraction Method Based on CEEMD-Parameter Optimized Morlet Wavelet Transform |
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| Transform and Its ApplicationLIANG Zhongming,YANG Qijiang and ZHU Faxin.Diesel Engine Vibration Signal Impact Feature Extraction Method Based on CEEMD-Parameter Optimized Morlet Wavelet Transform[J].Ship Engineering,2020,42(5):90-96. |
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| Authors: | Transform and Its ApplicationLIANG Zhongming YANG Qijiang and ZHU Faxin |
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| Institution: | School of Port and Transportation Engineering of ZheJiang Ocean University,School of Marine Engineering,Guangzhou Maritime University,School of Marine Engineering,Guangzhou Maritime University,School of Port and Transportation Engineering of ZheJiang Ocean University |
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| Abstract: | Aiming at the non-stationary signal generated by the vibration of marine diesel engine, a method of feature extraction of vibration signal is proposed based on the combination of complementary ensemble empirical mode decomposition (CEEMD) and Morlet wavelet analysis of parameter optimization. The CEEMD method is used to decompose the vibration signal. In the decomposed components, the useless periodic components are removed and the components with impact characteristics are retained. Then by combining the method of Morlet wavelet analysis of parameter optimization, the impact components are extracted according to the similarity between the Morlet wavelet and impact signal. The application analysis of the simulation signal and the vibration signal of the diesel engine verify the validity of the method to extract the impact characteristics of the vibration signal of the diesel engine. |
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| Keywords: | marine diesel engine vibration Non-stationary signal CEEMD Morlet wavelet |
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