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Journal of Projectiles, Rockets, Missiles and Guidance >

2022 , Vol. 42 >Issue 5: 10 - 14

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2022.05.003

Analysis Aviation Hydraulic Pump of Vibration Signal Based on Improved Threshold Singular Value and Wavelet

  • HE Qingfei 1 ,
  • WANG Xuping 2 ,
  • LI Yusheng 3
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  • 1 School of Mechanical Engineering, Xijing University, Xi’an 710123,China
  • 2 Academy of Combat Support, Rocket Force University of Engineering, Xi’an 710025,China
  • 3 Pinggao Group Co., Ltd., Pingdingshan 467000, Henan, China

Received date: 2021-09-02

  Online published: 2025-01-16

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Abstract

Aiming at analysing aviation hydraulic pump vibration signal, an improved method is presented by combining new wavelet threshold function and singular value decomposition de-noising method. Above all, the noise signal is decomposed into noise uniformity vectors. Secondly, through wavelet threshold de-noising on every vector. In the end, reconstruct the de-noised component to obtain the de-noised signal. The method can eliminate the disadvantages of soft and hard threshold de-noising methods, and suppress the Pseudo-Gibbs phenomena caused by threshold de-noising methods.Emulation experiment and different fault vibration signal of aviation hydraulic pump results proves that it can reduce the noise efficiently.

Key words： aviation hydraulic pump; vibration signal; wavelet threshold method; singular value decomposition

Cite this article

HE Qingfei , WANG Xuping , LI Yusheng . Analysis Aviation Hydraulic Pump of Vibration Signal Based on Improved Threshold Singular Value and Wavelet[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2022 , 42(5) : 10 -14 . DOI: 10.15892/j.cnki.djzdxb.2022.05.003

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