A subtle signal extraction method and its application in the signal processing

被引：0
|
作者：
Li H.-R. [1 ]
Sun J. [2 ]
Wang C.-W. [2 ]
Tian Z.-K. [1 ]
Guo B.-B. [2 ]
机构：
[1] No.4 Department, Ordnance Engineering College, Shijiazhuang
[2] Luoyang Electronic Equipment Test Center of China, Luoyang
来源：
Sun, Jian (hehetcs@163.com) | 1600年 / Nanjing University of Aeronautics an Astronautics卷 / 30期
关键词：
Information fusion; LCD-BSS; MUWDF; Signal processing; Subtle signal;
D O I：
10.16385/j.cnki.issn.1004-4523.2017.03.018
中图分类号：
学科分类号：
摘要：
During the degradation of the hydraulic pump, the vibration signals seem to be strongly nonlinear and the feature information is very weak. Therefore, a novel method for subtle signal extraction based upon MUWDF and LCD-BSS is proposed. First of all, dual-channel vibration signals are combined by the MUWDF algorithm. The approximate signals in various decomposition layers are selected and processed, so as to reduce the noise influences and increase feature information proportion. On this basis, the LCD-BSS algorithm is proposed for further dealing with the combined signal. The BIC and mutual information are combined to select appropriate ISC components to carry out the blind source separation for the required subtle signal containing sensitive feature information. Finally, the proposed method is verified by the pump vibration signals with various loose slipper degrees. © 2017, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
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页码：493 / 501
页数：8
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