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改进阈值奇异值小波法的航空液压泵振动信号分析

  • 何庆飞 1 ,
  • 王旭平 2 ,
  • 李禹生 3
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  • 1 西京学院机械工程学院,西安 710123
  • 2 火箭军工程大学作战保障学院,西安 710025
  • 3 平高集团有限公司,河南 平顶山 467000

何庆飞(1977—),男,山东临沂人,副教授,博士,研究方向:机械设备状态监测与故障诊断。

收稿日期: 2021-09-02

  网络出版日期: 2025-01-16

基金资助

国家科技重大专项基金(2017ZX04011010)

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

摘要

对航空液压泵采集振动信号进行研究,首先提出改进阈值函数的奇异值小波去噪法,该方法对信号进行奇异值分解,把噪声非均匀分布的信号正交分解成噪声相对均匀分布的分量,然后采用改进小波阈值去噪法对每个分量进行去噪,最后重构去噪后的分量得到去噪后信号。该方法克服了软、硬阈值的缺陷,不仅提高了信噪比而且能很好地消除高斯噪声,抑制阈值法去噪时导致的伪吉布斯现象。应用该方法对仿真信号和实测航空液压泵振动信号进行去噪处理,结果表明,该方法有效可行。

本文引用格式

何庆飞 , 王旭平 , 李禹生 . 改进阈值奇异值小波法的航空液压泵振动信号分析[J]. 弹箭与制导学报, 2022 , 42(5) : 10 -14 . DOI: 10.15892/j.cnki.djzdxb.2022.05.003

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.

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