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 浙江大学学报(工学版)  2017, Vol. 51 Issue (8): 1587-1595    DOI: 10.3785/j.issn.1008-973X.2017.08.014
 机械与能源工程

Analysis of planetary gear vibration signal based on iterated Hilbert transform
ZHU Wen-ying, FENG Zhi-peng
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
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Abstract:

A demodulation analysis method combining iterative Hilbert transform and Fourier transform was proposed, countering complex frequency components and amplitude modulation-frequency modulation characteristics of planetary gearbox signals. AM-FM mono-components were separated by iterated Hilbert transform, instantaneous amplitude and instantaneous frequency were estimated, and fault sensitive component was selected, amplitude demodulation and frequency demodulation of sensitive component were realized by Fourier spectrum. Iterative Hilbert transform and the Hilbert vibration decomposition were compared, based on the analysis of planetary gearbox local damage signals, results showed the advanced nature of the iterative Hilbert transform from three aspects:decomposition speed, signal-to-noise ratio of decomposition result, extraction effects of characteristic frequency. The proposed method was applied to analyze experimental signals of planetary gearbox, characteristic frequencies were accurately extracted, and gear faults were diagnosed, results showed that the method was validated.

 CLC: TH165

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#### 引用本文:

ZHU Wen-ying, FENG Zhi-peng. Analysis of planetary gear vibration signal based on iterated Hilbert transform. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(8): 1587-1595.

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