An improved spline-local mean decomposition and its application to vibration analysis of rotating machinery with rub-impact fault

CORC > 兰州理工大学 > 兰州理工大学 > 机电工程学院

	An improved spline-local mean decomposition and its application to vibration analysis of rotating machinery with rub-impact fault
	Deng, Linfeng; Zhao, Rongzhen
刊名	JOURNAL OF VIBROENGINEERING
	2014-02
卷号	16 期号:1 页码:414-433
关键词	local mean decomposition cubic spline interpolation self-adaptive waveform matching vibration analysis rotating machinery
ISSN号	1392-8716
英文摘要	A troublesome problem in application of local mean decomposition (LMD) is that the moving averaging process is time-consuming and inaccurate in processing the mechanical vibration signals. An improved spline-LMD (SLMD) method is proposed to solve this problem. The proposed method uses the cubic spline interpolation to compute the upper and lower envelopes of a signal, and then the local mean and envelope estimate functions can be derived using the envelopes. Meanwhile, a signal extending approach based on self-adaptive waveform matching technique is applied to extend the raw signal and overcome the boundary distortion resulting from the process of computing the upper and lower envelopes. Subsequently, this paper compares SLMD with LMD in four aspects through a simulative signal. The comparative results illustrate that SLMD consumes less computation time and produces more accurate decomposed results than LMD. In the experimental part, SLMD and LMD are respectively applied to analyze the vibration signals resulting from a rotor-bearing system with rub-impact fault. The results show that SLMD can more efficiently and accurately extract the important fault features, which demonstrates that SLMD performs better than LMD in analyzing the mechanical vibration signals.
资助项目	National Natural Science Foundation of China[50875118][51165019] ; Cultivation Program for Excellent Doctoral Dissertation of Lanzhou University of Technology[201102]
WOS研究方向	Engineering
语种	英语
出版者	JVE INT LTD
WOS记录号	WOS:000331525500038
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/34454]
专题	机电工程学院
通讯作者	Zhao, Rongzhen
作者单位	Lanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Deng, Linfeng,Zhao, Rongzhen. An improved spline-local mean decomposition and its application to vibration analysis of rotating machinery with rub-impact fault[J]. JOURNAL OF VIBROENGINEERING,2014,16(1):414-433.
APA	Deng, Linfeng,&Zhao, Rongzhen.(2014).An improved spline-local mean decomposition and its application to vibration analysis of rotating machinery with rub-impact fault.JOURNAL OF VIBROENGINEERING,16(1),414-433.
MLA	Deng, Linfeng,et al."An improved spline-local mean decomposition and its application to vibration analysis of rotating machinery with rub-impact fault".JOURNAL OF VIBROENGINEERING 16.1(2014):414-433.