基于LCD的齿轮箱混合故障盲源分离研究

中国机械工程 ›› 2015, Vol. 26 ›› Issue (8): 1062-1066.

基于LCD的齿轮箱混合故障盲源分离研究

杨宇;李永国;何知义;程军圣

湖南大学汽车车身先进设计制造国家重点实验室,长沙,410082

出版日期:2015-04-25 发布日期:2015-09-10
基金资助:
国家自然科学基金资助项目(51175158,51375152);湖南省自然科学基金资助项目(11JJ2026)

BSS Method of Gearbox Multi-fault Based on LCD

Yang Yu;Li Yongguo;He Zhiyi;Cheng Junsheng

State key Laboratory of Advanced Design and Manufacture for Vehicle Body,Hunan University,Changsha,410082

Online:2015-04-25 Published:2015-09-10
Supported by:
National Natural Science Foundation of China（No. 51175158,51375152）;Hunan Provincial Natural Science Foundation of China（No. 11JJ2026）

摘要/Abstract

摘要：

盲源分离是一种有效的混合故障诊断方法,而局部特征尺度分解（LCD）是非平稳信号的有效分析处理工具，综合两者的优点，提出了基于LCD的齿轮箱混合故障盲源分离方法。将源信号LCD分解，得到新的多维信号，采用Bayesian信息准则（BIC）估计盲源的数目并对多维信号进行重组。最后进行联合近似对角化处理，实现源信号的盲分离。仿真和实验结果表明，该方法能够有效地实现齿轮箱混合故障盲源分离。

关键词: 盲源分离, 局部特征尺度分解, 齿轮箱, 故障诊断

Abstract:

BSS is an effective multi-fault diagnosis method, and LCD is an effective tool of analyzing and processing non-stationary signals. Combining the advantages of LCD and BSS, a BSS of gearbox multi-fault was proposed based on LCD. The source signals were decomposed by LCD to constitute new multidimensional signals, then estimating blind source number by Bayesian information criterion(BIC) to restructure the multidimensional signals, finally, using joint approximate diagonalization to separate the blind source signals. Simulation and experiments show that the method can effectively separate the blind source of the gearbox multi-faults, and provide a new method for fault diagnosis of the gearbox.

Key words: blind , source , separation(BSS);local characteristic scale decomposition(LCD);gearbox;fault , diagnosis

中图分类号:

TH113

杨宇, 李永国, 何知义, 程军圣. 基于LCD的齿轮箱混合故障盲源分离研究[J]. 中国机械工程, 2015, 26(8): 1062-1066.

Yang Yu, Li Yongguo, He Zhiyi, Cheng Junsheng. BSS Method of Gearbox Multi-fault Based on LCD[J]. China Mechanical Engineering, 2015, 26(8): 1062-1066.

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