Title: Improved algorithm against end effect of EMD based on extension and variable cosine window
Abstract: For the end effect of empirical mode decomposition( EMD) keeping pace with increase in filtering level,a new improved method using a combination of extension and variable cosine window was proposed. Firstly,the signal was extended with a certain length of data. Then,the extended signal was processed at both ends with variable cosine window before extracting every intrinsic model function( IMF) to make the end effect of each IMF minimized and to ensure the correct decomposition and the improvement of the EMD algorithm. Simulation analysis and crack fault diagnosis examples showed that the proposed method can inhibit end effects effectively.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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