基于CYCBD和包络谱的滚动轴承微弱故障特征提取

赵晓涛; 孙虎儿; 姚巍

doi:10.16578/j.issn.1004.2539.2020.04.026

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基于CYCBD和包络谱的滚动轴承微弱故障特征提取

开发应用 | 更新时间：2022-10-20

- 基于CYCBD和包络谱的滚动轴承微弱故障特征提取
- Feature Extraction of Weak Fault for Rolling Bearing based on CYCBD and Envelope Spectrum
- 机械传动 2020年44卷第4期页码：165-169
- 作者机构：
  
  1.中北大学机械工程学院，山西太原 030051
- 作者简介：
  
  赵晓涛（1992— ），男，山西平鲁人，硕士研究生，研究方向为故障诊断、机电一体化。
  孙虎儿（1972— ），男，山西寿阳人，博士，副教授，研究方向为机械设备状态监测与故障诊断、摩擦科学与工程。
- 基金信息：
  
  山西省自然科学基金(201801D121186)
- DOI：10.16578/j.issn.1004.2539.2020.04.026
  中图分类号：
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赵晓涛,孙虎儿,姚巍.基于CYCBD和包络谱的滚动轴承微弱故障特征提取[J].机械传动,2020,44(04):165-169.

Zhao Xiaotao,Sun Huer,Yao Wei.Feature Extraction of Weak Fault for Rolling Bearing based on CYCBD and Envelope Spectrum[J].Journal of Mechanical Transmission,2020,44(04):165-169.
赵晓涛,孙虎儿,姚巍.基于CYCBD和包络谱的滚动轴承微弱故障特征提取[J].机械传动,2020,44(04):165-169. DOI： 10.16578/j.issn.1004.2539.2020.04.026.

Zhao Xiaotao,Sun Huer,Yao Wei.Feature Extraction of Weak Fault for Rolling Bearing based on CYCBD and Envelope Spectrum[J].Journal of Mechanical Transmission,2020,44(04):165-169. DOI： 10.16578/j.issn.1004.2539.2020.04.026.

摘要

针对在强噪声的干扰下，滚动轴承微弱故障特征难以有效地提取的问题，提出一种基于最大2阶循环平稳盲解卷积（Maximum Second-order Cyclostationarity Blind Deconvolution，CYCBD）和包络谱相结合的微弱故障特征提取方法。首先，由故障特征频率设置合理的循环频率集，使用CYCBD对含有强噪声的微弱故障冲击信号进行降噪处理，增强信号中的周期性冲击成分；然后，对降噪信号进行Hilbert包络谱分析来识别故障特征频率。通过仿真和实验，结果证明，该方法能有效地提取被强噪声淹没的微弱故障特征。

Abstract

To solve the problem that it is difficult to extract the weak fault features of rolling bearing effectively under the interference of strong background noise，a method of extracting the weak fault features based on the combination of maximum second-order cyclostationary blind deconvolution （CYCBD） and envelope spectrum is proposed.Firstly，a reasonable cycle frequency set is set by the fault characteristic frequency，and CYCBD is used to reduce the noise of weak fault impulse signal with strong noise，so as to enhance the periodic impulse component in the signal.Then，the noise reduction signal is analyzed by Hilbert envelope spectrum to identify the fault characteristic frequency.The simulation and experimental results show that the method can effectively extract the weak fault features submerged by strong noise.

关键词

滚动轴承最大2阶循环平稳盲解卷积微弱故障特征提取

Keywords

Rolling bearingMaximum second-order cyclostationarity blind deconvolutionWeak faultFeature extraction

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