[1]刘 昉,张鲁丰,庞博慧,等.基于CEEMDAN和MPE的导墙振动信号降噪方法及应用[J].郑州大学学报(工学版),2022,43(05):91-97.
 Denoising method of discharge guide wall vibration signal ba<x>sed on CEEMDAN and MPE and its application[J].Journal of Zhengzhou University (Engineering Science),2022,43(05):91-97.
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基于CEEMDAN和MPE的导墙振动信号降噪方法及应用()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
43
期数:
2022年05期
页码:
91-97
栏目:
出版日期:
2022-08-22

文章信息/Info

Title:
Denoising method of discharge guide wall vibration signal ba<x>sed on CEEMDAN and MPE and its application
作者:
刘 昉1 张鲁丰1 庞博慧2 梁 超1 姚 烨1
文献标志码:
A
摘要:
针对泄流导墙实测振动位移信号中存在随机噪声的问题,将多尺度排列熵引入到泄流导墙振动信号的降噪处理中,使用一种应用于泄流结构的基于自适应噪声的完备总体经验模态分解 ( CEEM-DAN)和多尺度排列熵( MPE)联合去噪的方法。 首先,通过 CEEMDAN 方法对导墙振动信号进行处理,得到一系列固有模态函数( IMF) ;其次,通过多尺度排列熵分析各 IMF 的随机性,并以多尺度排列熵值作为评价指标,将各 IMF 分量筛选为含噪声的 IMF 分量和纯净的 IMF 分量;最后,利用小波阈值降噪方法对含噪声的 IMF 分量进行降噪处理,将降噪处理后的数据与剩余纯净的 IMF 分量重构,获得降噪后的泄流导墙振动信号。 仿真信号和工程实例结果表明:使用该方法提高了信号的降噪效果,能精确去除泄流导墙振动信号中的噪声,且有效保留了振动信号中的特征信息,具有一定的可行性。 该方法的降噪结果可以作为实现对泄流导墙安全监测的可靠依据,可以应用到与之类似的导墙振动信号降噪处理中,为实现泄流导墙结构的健康运行打下基础。
Abstract:
In order to solve the problem of random noise in the measuring vibration displacement signals of thedischarge guide wall , multi-scalc permulation entropy was introduced to reduce the noise of the vibration signalof the discharge guide wall. A signal denoising method based on complete ensemble empirical mode decompo-sition with adaptive noise(CEEMDAN) and muli-scale permulation entropy(MPE) was applied to dischargestruclures. The vibration signal of the guide wall was decomposed by CEEMDAN to obtain a series of intrinsicmode functions ( IMFs ) , and then the muli-scale permulation entropy (MPE) was introduced to analyze therandomness of each lMF , and MPE value was used as the evaluation index to screen them into noise-dominantIMF and real IMF. The wavelet threshold denoising method was used to denoise the noise-dominant lMF. Theprocessed dala was reconstructed with the remaining real IMFs to obtain the pure guide wall vibration signal.The results of simulation signals and engimeering examples showed that this method could improve the noise re-duction effect of the signal , accuralely remove the noise in the vibration signal of the discharge guide wall andretain the characteristic information of the vibration signal effectively ,it had certain feasibility . The noise re-duction results of this method could be used as a reliable basis for the safely monitoring of the discharge guidewall ,and could be applied to the noise reduction of similar vibration signals of the guide wall.
更新日期/Last Update: 2022-08-23