[1] Mao Yifan, Xu Feiyun,. A fault feature extraction method of gearbox based on compounddictionary noise reduction and optimized Fourier decomposition [J]. Journal of Southeast University (English Edition), 2021, 37 (1): 22-32. [doi:10.3969/j.issn.1003-7985.2021.01.004]

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A fault feature extraction method of gearbox based on compounddictionary noise reduction and optimized Fourier decomposition()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

37

Issue:

2021 1

Page:

22-32

Research Field:

Mechanical Engineering

Publishing date:

2021-03-20

Info

Title:

A fault feature extraction method of gearbox based on compounddictionary noise reduction and optimized Fourier decomposition

Author(s):

Mao Yifan;  Xu Feiyun

School of Mechanical Engineering, Southeast University, Nanjing 211189, China

Keywords:

Fourier decomposition;  compound dictionary;  mode mixing;  gearbox fault;  feature extraction

PACS:

TH17

DOI:

10.3969/j.issn.1003-7985.2021.01.004

Abstract:

Aimed at the problem that Fourier decomposition method(FDM)is sensitive to noise and existing mode mixing cannot accurately extract gearbox fault features, a gear fault feature extraction method combining compound dictionary noise reduction and optimized FDM(OFDM)is proposed. Firstly, the characteristics of the gear signals are used to construct a compound dictionary, and the orthogonal matching pursuit algorithm(OMP)is combined to reduce the noise of the vibration signal. Secondly, in order to overcome the mode mixing phenomenon occuring during the decomposition of FDM, a method of frequency band division based on the extremum of the spectrum is proposed to optimize the decomposition quality. Then, the OFDM is used to decompose the signal into several analytic Fourier intrinsic band functions(AFIBFs). Finally, the AFIBF with the largest correlation coefficient is selected for Hilbert envelope spectrum analysis. The fault feature frequencies of the vibration signal can be accurately extracted. The proposed method is validated through analyzing the gearbox fault simulation signal and the real vibration signals collected from an experimental gearbox.

References:

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Memo

Memo:

Biographies: Mao Yifan(1993—), male, graduate; Xu Feiyun(corresponding author), male, doctor, professor, fyxu@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No. 51975117), the Key Research & Development Program of Jiangsu Province(No. BE2019086).
Citation: Mao Yifan, Xu Feiyun. A fault feature extraction method of gearbox based on compound dictionary noise reduction and optimized Fourier decomposition[J].Journal of Southeast University(English Edition), 2021, 37(1):22-32.DOI:10.3969/j.issn.1003-7985.2021.01.004.

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