Journal
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
Volume 107, Issue -, Pages 53-77Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2018.01.019
Keywords
Variational mode decomposition; Mode mixing; Mode number; Permutation entropy; Kurtosis criteria; EWT
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Funding
- National Key Research and Development Program of China [2016YFC0401901]
- Tianjin Regional Demonstration Program for Marine Economical Innovation and Development [cxsf2014-15]
- Program of Introducing Talents of Discipline to Universities [B14012]
- Fund for Key Research Area Innovation Groups of China Ministry of Science and Technology [2014RA4031]
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Variational mode decomposition is a completely non-recursive decomposition model, where all the modes are extracted concurrently. However, the model requires a preset mode number, which limits the adaptability of the method since a large deviation in the number of mode set will cause the discard or mixing of the mode. Hence, a method called Adaptive Variational Mode Decomposition (AVMD) was proposed to automatically determine the mode number based on the characteristic of intrinsic mode function. The method was used to analyze the simulation signals and the measured signals in the hydropower plant. Comparisons have also been conducted to evaluate the performance by using VMD, EMD and EWT. It is indicated that the proposed method has strong adaptability and is robust to noise. It can determine the mode number appropriately without modulation even when the signal frequencies are relatively close. (C) 2018 Elsevier Ltd. All rights reserved.
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