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| 两次去相关用于振动信号盲分离 | |
| 引用本文： | 江涌,章林柯,何琳. 两次去相关用于振动信号盲分离[J]. 振动、测试与诊断, 2011, 31(2): 241-245 |
| 作者姓名： | 江涌 章林柯 何琳 |
| 作者单位： | 1. 海军工程大学振动与噪声研究所,武汉,430033;防化研究院,北京,102205 2. 海军工程大学振动与噪声研究所,武汉,430033 3. 海军驻431厂军代室,葫芦岛,125004 |
| 摘 要： | 盲分离方法通常要求对混合信号进行去相关,提出了一种基于两次去相关的振动信号盲分离方法.首先对传统的预白化方法进行了分析,指出其本质就是空间去相关;然后对白化后信号某一非零延迟进行时间去相关,得到两次去相关盲分离方法,并对该方法的可分性进行分析,给出两次去相关盲分离方法的详细步骤;最后分别用亚高斯、超高斯的混合信号和振动混合信号的分离试验验证了该方法的可行性. |
| 关 键 词： | 噪声源 盲分离 两次去相关 白化 |
Blind Separation of Vibration Signals Using Double Decorrelation |
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| Jiang Yong,Zhang Linke,He Lin,Wang Wei. Blind Separation of Vibration Signals Using Double Decorrelation[J]. Journal of Vibration,Measurement & Diagnosis, 2011, 31(2): 241-245 | |
| Authors: | Jiang Yong Zhang Linke He Lin Wang Wei |
| Affiliation: | Jiang Yong1,2,Zhang Linke1,He Lin1,Wang Wei3 (1Institute of Noise & Vibration,Naval University of Engineering Wuhan,430033,China) (2Institute of Chemical Defense Beijing,102205,China) (3Naval Deputy Office of Shipyard 431 Huludao,125004,China) |
| Abstract: | A blind separation method was presented to separate vibration signals by using double decorrelation.Generally,the mixed signals should be whiten at first when using the blind separation method.Firstly,the traditional whitening method was analyzed and its essence of spatial decorrelation was pointed out.Then,the double decorrelation method was obtained with the decorrelation of whitening signals at certain nonzero delay.The separability of the method was analyzed and the process of the algorithm was presente... |
| Keywords: | noise source blind separation decorrelation whitening |
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