A method of eliminating the vibration signal noise of hydropower unit based on NA-MEMD and approximate entropy

作者：An Xueli^*; Yang Junjie

来源：Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering , 2017, 231(2): 317-328.

DOI：10.1177/0954408915595763

• Hydropower unit
• vibration signal
• eliminating noise
• noise-assisted multivariate empirical mode decomposition
• approximate entropy

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.

• 出版日期2017-4
• 单位中国水利水电科学研究院