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An Improved VMD-Based Denoising Method for Time Domain Load Signal Combining Wavelet with Singular Spectrum Analysis
Joint Authors
Niu, Wentie
Fu, Jingjing
Cai, Fuyou
Guo, Yonghao
Liu, Hongda
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-04-29
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
Measured load data play a crucial role in the fatigue durability analysis of mechanical structures.
However, in the process of signal acquisition, time domain load signals are easily contaminated by noise.
In this paper, a signal denoising method based on variational mode decomposition (VMD), wavelet threshold denoising (WTD), and singular spectrum analysis (SSA) is proposed.
Firstly, a simple criterion based on mutual information entropy (MIE) is designed to select the proper mode number for VMD.
Detrended fluctuation analysis (DFA) is adopted to obtain the noise level of the noisy signal, which can optimize the selection of MIE threshold.
Meanwhile, the noisy signal is adaptively decomposed into band-limited intrinsic mode functions (BLIMFs) by using VMD.
In addition, weighted-permutation entropy (WPE) is applied to divide the BLIMFs into signal-dominant BLIMFs and noise-dominant BLIMFs.
Then, the signal-dominant BLIMFs are reconstructed with the noise-dominant BLIMFs processed by WTD.
Finally, SSA is implemented for the reconstructed signal.
Experimental results of synthetic signals demonstrate that the presented method outperforms the conventional digital signal denoising methods and the related methods proposed recently.
Effectiveness of the proposed method is verified through experiments of the measured load signals.
American Psychological Association (APA)
Fu, Jingjing& Cai, Fuyou& Guo, Yonghao& Liu, Hongda& Niu, Wentie. 2020. An Improved VMD-Based Denoising Method for Time Domain Load Signal Combining Wavelet with Singular Spectrum Analysis. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1193262
Modern Language Association (MLA)
Fu, Jingjing…[et al.]. An Improved VMD-Based Denoising Method for Time Domain Load Signal Combining Wavelet with Singular Spectrum Analysis. Mathematical Problems in Engineering No. 2020 (2020), pp.1-14.
https://search.emarefa.net/detail/BIM-1193262
American Medical Association (AMA)
Fu, Jingjing& Cai, Fuyou& Guo, Yonghao& Liu, Hongda& Niu, Wentie. An Improved VMD-Based Denoising Method for Time Domain Load Signal Combining Wavelet with Singular Spectrum Analysis. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1193262
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1193262