A method of eliminating the vibration signal noise of hydropower unit based on NA-MEMD and approximate entropy
A method of eliminating the vibration signal noise of hydropower unit based on NA-MEMD and approximate entropy
复制标题
基于NA-MEMD和近似熵的水电机组振动信号噪声消除方法
DOI：
10.1177/0954408915595763
复制
发表时间：
2017-04-01
影响因子：
2.4
通讯作者：
Yang, Junjie
中科院分区：
文献类型：
--
作者：
An, Xueli;Yang, Junjie
A new vibration signal denoising method of hydropower unit based on noise-assisted multivariate empirical mode decomposition (NA-MEMD) and approximate entropy is proposed. Firstly, the NA-MEMD is used to decompose the signal into a number of intrinsic mode functions. Then, the approximate entropy of each component is computed. According to a preset threshold of approximate entropy, these components are reconstructed to denoise vibration signal of hydropower unit. The analysis results of simulation signal and real-world signal show that the proposed method is adaptive and has a good denoising performance. It is very suitable for online denoising of hydropower unit's vibration signal.
