MATEC Web of Conferences
Volume 24, 2015EVACES’15, 6th International Conference on Experimental Vibration Analysis for Civil Engineering Structures
|Number of page(s)||4|
|Section||Vibration data analysis techniques|
|Published online||19 October 2015|
An orthogonal technique for empirical mode decomposition in Hilbert-Huang transform
1 Tongji University, School of Civil Engineering, Shanghai, China
2 Central South University, School of Civil Engineering, Changsha, China
First, it is indicated that the intrinsic mode functions (IMF) obtained by the empirical mode decomposition (EMD) are not orthogonal. Then an orthogonal technique based on Gram-Schmidt method is proposed to obtain the complete orthogonal intrinsic mode functions. Three ways of the orthogonal processes are suggested and compared in the paper. Finally, the suggested method is validated through the decomposition of a typical time history. The numerical results show that the orthogonal IMF can be obtained easily by the technique proposed in the paper.
© Owned by the authors, published by EDP Sciences, 2015
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