Analysis of weak faults of planetary gears based on frequency domain information exchange method

Lichen Shi1 , Zhenya Kang2 , Haitao Wang3 , Kun Li4

1, 2, 3Xi’an University of Architecture and Technology Electrical and Mechanical College, Shaanxi Xi’an, 710055, China

4School of Mechanical Engineering, Xi’an Jiaotong University, Shaanxi Xi’an, 710049, China

3Corresponding author

Journal of Vibroengineering, Vol. 21, Issue 6, 2019, p. 1622-1635. https://doi.org/10.21595/jve.2019.19969
Received 12 May 2018; received in revised form 9 March 2019; accepted 16 March 2019; published 30 September 2019

Copyright © 2019 Lichen Shi, et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Abstract.

This paper focuses on solving a series of problems, in particular, the extraction of planetary gear fault characteristics for cracked and broken teeth, using the frequency domain information exchange method. First, we discuss deficiencies in classical stochastic resonance fault feature extraction method. A number of issues are associated with adaptive stochastic resonance based on the re-scaling frequency method used during the small parameter issues, such as sampling frequency ratio constraints and easily induced aliasing of the target frequency band. Second, to overcome the above-mentioned problems, this paper proposes a frequency domain information exchange optimization method. Simulations were carried out used the proposed method and results were compared to those obtained using previously presented adaptive stochastic resonance based on the re-scaling frequency method. Finally, tests were performed on an experimental planetary gearbox failure platform to further verify the frequency domain information exchange method for effectively extracting planetary gear crack and missing tooth fault features.

Analysis of weak faults of planetary gears based on frequency domain information exchange method

Highlights
  • The possibility of extracting fault features of broken teeth and planetary gear by frequency domain information exchange method is discussed.
  • A frequency-domain information exchange optimization method is proposed through theoretical analysis.
  • Experiments show that the frequency domain information exchange method can effectively extract the characteristics of planetary gear cracks and tooth missing faults.

Keywords: planetary gearbox, cracked planetary gear teeth, frequency information exchange, weak feature extraction.

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