Correlated jointly frequency rotor fault sources number estimation and sub-band blind separation

被引：0

作者：

Li, Jiyong ^{[1
]}

Li, Shunming ^{[1
]}

Tian, Guocheng ^{[2
]}

Chen, Xiaohong ^{[3
]}

机构：

[1] College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing

[2] Shandong Zhongshi Yitong Group Co., Ltd., Jinan

[3] College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing

来源：

Zhendong Ceshi Yu Zhenduan/Journal of Vibration, Measurement and Diagnosis | 2015年 / 35卷 / 01期

关键词：

Blind source separation; Correlated sources; Mutual information; Non-negative matrix factorization; Sub-band decomposition;

D O I：

10.16450/j.cnki.issn.1004-6801.2015.01.025

中图分类号：

O1 [数学];

学科分类号：

0701 ; 070101 ;

摘要：

Crosscover frequency response is produced by the rotor under abnormal vibration, so rotor jointly frequency fault sources cannot be satisfied statically independent request. The traditional source number estimation such as singular value decomposition method and standard independent standard analysis cannot extract fault sources. This paper estimates fault sources number with a non-negative method in the frequency domain, source and mixture system characteristics not in consider, and then to extract fault signals with wavelet packet, and separate recovered signals with small mutual information, to eliminate jointly frequency signal, to obtain independent non-correlated sources. The feasibility is verified by practical and theoretical methods. ©, 2015, Nanjing University of Aeronautics an Astronautics. All right reserved.

引用

页码：146 / 149

页数：3

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