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  HomeContents of Chinese Journal of Mechanical Engineering (English Edition),2008 No.2FAST IMPLEMENTATION OF ORTHOGONAL EMPIRICAL MODE DECOMPOSITION AND ITS APPLICA-TION INTO HARMONIC DETECTION

QIN Yi

QIN Shuren

MAO Yongfang
College of Mechanical Engineering,
Chongqing University,
Chongqing 400044, China

 

 

FAST IMPLEMENTATION OF
ORTHOGONAL EMPIRICAL MODE
DECOMPOSITION AND ITS APPLICA-
TION INTO HARMONIC DETECTION* 

 

Abstract: Since the empirical mode decomposition (EMD) lacks strict orthogonality, the method of orthogonal empirical mode decomposition (OEMD) is innovationally proposed. The primary thought of this method is to obtain the intrinsic mode function (IMF) and the residual function by auto-adaptive band-pass filtering. OEMD is proved to preserve strict orthogonality and completeness theoretically, and the orthogonal basis function of OEMD is generated, then an algorithm to implement OEMD fast, IMF binary searching algorithm is built based on the point that the analytical band-pass filtering preserves perfect band-pass feature in the frequency domain. The application into harmonic detection shows that OEMD successfully conquers mode aliasing, avoids the occurrence of false mode, and is featured by fast computing speed. Furthermore, it can achieve harmonic detection accurately combined with the least square method.

Key words: Empirical mode decomposition Orthogonal empirical mode decomposition Analytic band-pass filtering Binary searching Harmonic detection

 


* This project is supported by National Natural Science Foundation of China(No. 50575233). Received March 26, 2007; received in revised form November 19, 2007; accepted December 12, 2007

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Biographical notes

QIN Yi, male, born in 1982, is a PhD candidate in College of Mechanical Engineering, Chongqing University, China. His research interests include signal processing, and intelligent measurement and instrumentation.
Tel: +86-23-65106974; E-mail: qy_808@yahoo.com.cn

QIN Shuren, male, born in 1939, is a professor, a PhD advisor and an expert in intelligent measurement and instrumentation. His research interests include digital signal processing system theory and applications, electric and non-electric quantity measuring theory, methods, and applications, virtual measurement and instrumentation. Over 240 papers have been published.

MAO Yongfang, female, born in 1983, is a PhD candidate in College of Mechanical Engineering, Chongqing University, China. His research interests include signal processing, intelligent measurement and instrumentation.


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