A Combined Noise Reduction Method for Floodgate Vibration Signals Based on Adaptive Singular Value Decomposition and Improved Complete Ensemble Empirical Mode Decomposition with Adaptive Noise

被引:2
|
作者
Wang, Wentao [1 ]
Zhu, Huiqi [1 ]
Cheng, Yingxin [1 ]
Tang, Yiyuan [1 ]
Liu, Bo [1 ]
Li, Huokun [1 ]
Yang, Fan [2 ]
Zhang, Wenyuan [2 ]
Huang, Wei [1 ]
Zheng, Fang [3 ]
机构
[1] Nanchang Univ, Sch Infrastruct Engn, Nanchang 330031, Peoples R China
[2] China Inst Water Resources & Hydropower Res, Dept Hydraul, Beijing 100038, Peoples R China
[3] China Railway Water Conservancy & Hydropower Plann, Nanchang 430074, Peoples R China
基金
中国国家自然科学基金;
关键词
floodgates; vibration signal; noise reduction; ASVD algorithm; ICEEMDAN; IDENTIFICATION METHOD; EMD;
D O I
10.3390/w15244287
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
To address the issue of the vibration characteristic signals of floodgates being affected by background white noise and low-frequency water flow noise, a noise reduction method combining the improved adaptive singular value decomposition algorithm (ASVD) and the improved complete ensemble EMD with adaptive noise (ICEEMDAN) is proposed. Firstly, a Hankel matrix is constructed based on the collected discrete time signals. After performing SVD on the Hankel matrix, the ASVD algorithm is used to automatically select the effective singular values to filter out most of the background white noise and retain the useful frequency components with similar energy in the signal. Then, ICEEMDAN combined with the Spearman correlation coefficient method is used to further filter out residual white noise and low-frequency water flows. The noise reduction performance of this combined method is verified through simulation experiments. Filtered by the ASVD-ICEEMDAN method, the signal-to-noise ratio of the simulation signal (50% noise level) is increased from 4.417 to 16.237, and the root mean square error is reduced from 2.286 to 0.586. Based on the practically measured vibration signals of a floodgate at a large hydropower station, the result shows that the ASVD-ICEEMDAN method exhibits good noise reduction performance and feature information extraction abilities for floodgate vibration signals, and can provide support for operational mode analysis and damage identification of practical structures under complex interference conditions.
引用
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页数:17
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