RETRACTED: The Improved Noise Reduction Method for The Vibration Signal Based on Variational Mode Decomposition (Retracted article. See vol. 36, pg. 2503, 2022)

被引：1
|
作者：
Liu, Zhiting [1 ]
Wang, Yuhua [1 ]
Zheng, Wenwei [1 ]
Zhou, Yuexia [2 ]
机构：
[1] Foshan Univ, Coll Mech & Elect Engn, Foshan, Peoples R China
[2] Foshan Univ, Coll Elect Informat Engn, Foshan, Peoples R China
来源：
FILOMAT | 2020年 / 34卷 / 15期
关键词：
Signal noise reduction; VMD; Leaked energy; Autocorrelation function; Energy concentration ratio;
D O I：
10.2298/FIL2015975L
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
The variational model decomposition (VMD) has a problem that is difficult to determine the number of intrinsic mode functions (IMF). We use the leaked energy to determine the number of IMFs. And we use the energy concentration rate of the IMF's autocorrelation function and the correlation coefficient between the IMFs and the original signal, define Q as the ratio of the energy concentration and the correlation coe fficient, and use Q to determine the noise IMFs in the IMFs. Then, we filter the noise IMFs and use the remaining IMFs to reconstruct signal to achieve noise reduction. Finally, we use the signal-tonoise ratio (SNR) to compare the noise reduction method proposed in this paper and the Empirical Mode Decomposition (EMD) noise reduction method.
引用
收藏
页码：4975 / 4983
页数：9
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