全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

基于LMD与奇异值差分谱的滚动轴承故障诊断方法

Keywords: 局部均值分解,奇异值差分谱,故障诊断

Full-Text   Cite this paper   Add to My Lib

Abstract:

针对滚动轴承故障振动信号的非线性非平稳特性及强噪声特性,提出了一种基于局部均值分解(localmeandecomposition,LMD)和奇异值差分谱的滚动轴承故障诊断方法.首先对原始信号进行LMD分解,得到若干乘积函数(productfunction,PF)分量,然后对故障特征明显的分量构建Hankel矩阵并进行奇异值分解,求出奇异值差分谱曲线,找到奇异值差分谱最大突变点来确定奇异值重构分量的个数,进而对包含故障特征频段的分量进行消噪和重构,再对重构信号进行Hilbert包络谱分析,提取故障特征.实验结果和工程应用表明:LMD和奇异值差分谱结合的信号特征提取方法,能准确、有效地提取滚动轴承的故障特征频率,对故障类型作出准确判断.

References

[1]  任达千,杨世锡,吴昭同,等.LMD时频分析方法的端点效应在旋转机械故障诊断中的影响[J].中国机械工程,2012,23(8):951-956.REN Da-qian,YANG Shi-xi,WU Zhao-tong,et al.Research on end effect of LMD based time-frequency analysis in rotating machinery fault diagnosis[J].China Mechanical Engineering,2012,23(8):951-956.(in Chinese)
[2]  AKRITAS A G,MALASCHONOK G I.Applications of singular value decomposition(SVD)[J].Mathematics and Computers in Simulation,2004,67(1):15-31.
[3]  陈恩利,吴勇军,申永军,等.基于改进奇异值分解技术的齿轮调制故障特征提取[J].振动工程学报,2008,21(5):530-534.CHEN En-li,WU Yong-jun,SHEN Yong-jun,et al.An improved method of detecting modulated gear fault characteristic based on singularity value decomposition[J].Journal of Vibration Engineering,2008,21(5):530-534.(in Chinese)
[4]  吕志民,张武军,徐金梧.基于奇异谱的降噪方法及其在故障诊断技术中的应用[J].机械工程学报,1999,35(3):85-88.LYU Zhi-min,ZHANG Wu-jun,XU Jin-wu.A noise reduction method based singular spectrum and its application in machine fault diagnosis[J].Chinese Journal of Mechanical Engineering,1999,35(3):85-88.(in Chinese)
[5]  赵学智,叶邦彦,陈统坚.基于小波-奇异值分解差分谱的弱故障特征提取方法[J].机械工程学报,2012,48(7):37-48.ZHAO Xue-zhi,YE Bang-yan,CHEN Tong-jian.Extraction method of faint fault feature based on waveletSVD difference spectrum[J].Journal of Mechanical Engineering,2012,48(7):37-48.(in Chinese)
[6]  SMITH J S.The local mean decomposition and its application to EEG perception data[J].J R Soc Interface,2005,2(5):443-454.
[7]  CHENG J S,YANG Y,YANG Y.A rotating machinery fault diagnosis method based on local mean decomposition[J].Digital Signal Processing,2012,22(2):356-366.
[8]  YANG Y,CHENG J S,ZHANG K.An ensemble local means decomposition method and its application to local rub-impact fault diagnosis of the rotor systems[J].Measurement,2012,45(3):561-570.
[9]  张亢,程军圣,杨宇.基于自适应波形匹配延拓的局部均值分解端点效应处理方法[J].中国机械工程,2010,21(4):457-462.ZHANG Kang,CHENG Jun-sheng,YANG Yu.Processing method for end effects of local mean decomposition based on self-adaptive waveform matching extending[J].China Mechanical Engineering,2010,21(4):457-462.(in Chinese)
[10]  胡劲松,杨世锡,任达千.基于样条的振动信号局域均值分解方法[J].数据采集与处理,2009,24(1):82-86.HU Jin-song,YANG Shi-xi,REN Da-qian.Spline-based local mean decomposition method for vibration signal[J].Journal of Data Acquisition&Processing,2009,24(1):82-86.(in Chinese)

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133