Denoising method for Fiber Optic Gyro measurement signal of face slab deflection of concrete face rockfill dam based on sparrow search algorithm and variational modal decomposition

作     者：Xu, Lang Cai, Desuo Shen, Wei Su, Huaizhi 

作者机构：Hohai Univ State Key Lab Hydrol Water Resources & Hydraul En Nanjing 210098 Peoples R China Hohai Univ Coll Water Conservancy & Hydropower Engn Nanjing 210098 Peoples R China China Three Gorges Univ Coll Hydraul & Environm Engn Yichang 443002 Peoples R China Changijang River Sci Res Inst Wuhan 430010 Peoples R China 

出 版 物：《SENSORS AND ACTUATORS A-PHYSICAL》 (传感器与执行机构，A辑：物理传感器)

年 卷 期：2021年第331卷

页      面：112913-112913页

核心收录：

学科分类：12[管理学] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 0808[工学-电气工程] 08[工学] 0804[工学-仪器科学与技术] 

基　　金：National Key Research and Development Program of China [2019YFC1510801, 2018YFC0407101] National Natural Science Foundation of China [51979093, 51739003] Open Foundation of State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Fundamental Research Funds for the Central Universities [2015B25414] 

主　　题：Fiber optic gyro The deflection measurement of face slab Variational mode decomposition Sparrow search algorithm Mean mahalanobis distance Signal denoising 

摘      要：In order to suppress the noise in the measurement signal of face slab deflection of concrete face rockfill dam (CFRD) by fiber optic gyro (FOG), a denoising method based on sparrow search algorithm (SSA) and variational mode decomposition (VMD) method is proposed in this paper. Firstly, the SSA algorithm was used to optimize parameters k and of VMD, the fitness function of the algorithm was established based on the value of the kth intrinsic mode function (IMF) and the center frequency of the k-1th IMF obtained by the VMD decomposition. Then, this paper proposed a method to extract useful IMFs by calculating the mean Mahalanobis distance (MMD) of the Fast Fourier transform (FFT) functions between each IMF and the residual component. Finally, through the noise reduction analysis of FOG dynamic rotation experimental signal and the measured signal in practical engineering application, and compared with the results of traditional empirical mode decomposition (EMD) and VMD methods, the superiority of the proposed method was verified. (c) 2021 Elsevier B.V. All rights reserved.