基于MOMEDA和极坐标时频特征级联增强的轴承早期特征提取

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (19) : 168-173.

论文

张志强1，梅检民2，赵慧敏2，常春2，沈虹2

作者信息 +

Early bearing fault feature extraction based on CEMP time-frequency features

ZHANG Zhiqiang1, MEI Jianmin2, ZHAO Huimin2, CHANG Chun2, SHEN Hong2

Author information +

文章历史 +

摘要

针对变速器轴承早期故障特征微弱、并发故障特征耦合的问题，提出一种基于MOMEDA和极坐标时频特征级联增强（CEMP）方法，对轴承早期单一和并发微弱故障特征进行提取。计算振动信号的Teager能量算子，对冲击成分能量进行一级增强；运用多点最优最小熵反褶积修正（MOMEDA）对信号故障特征周期的冲击信息进行二级增强；采用同步压缩小波时频分析（SWT），并将SWT系数循环映射到极坐标图上，在角域上三级增强故障特征周期的冲击成分。对正常、外圈故障、内圈故障、并发故障四种工况轴承实测信号进行CEMP分析，并进行有效性验证，结果表明：该方法能高识别率提取轴承早期单一故障和并发故障的微弱特征。

Abstract

Aiming at the problem of weak early fault features and coupling of concurrent fault features of transmission bearings, a method based on cascade enhancement of MOMEDA and polar coordinates (CEMP) time-frequency features was proposed to extract early single and concurrent weak fault features of bearings. Teager energy operator of vibration signals was calculated to do first level enhancement of impact component energy. The multi-point optimal minimum entropy deconvolution amendment (MOMEDA) was used to do second level enhancement of impact information of fault feature period. The synchro-squeezing wavelet transform (SWT) was used to map SWT coefficients circularly into polar coordinate graph, and do third level enhancement of impact component of fault feature period in angle domain. The CEMP analysis was conducted for measured bearing signals under working conditions of normal, outer ring faults, inner ring faults and concurrent faults to verify the effectiveness of the proposed method. Results showed that the proposed method can extract weak and early features of single fault and concurrent ones of bearings with a high recognition rate.

导出引用

张志强1，梅检民2，赵慧敏2，常春2，沈虹2. 基于MOMEDA和极坐标时频特征级联增强的轴承早期特征提取[J]. 振动与冲击, 2020, 39(19): 168-173

ZHANG Zhiqiang1, MEI Jianmin2, ZHAO Huimin2, CHANG Chun2, SHEN Hong2. Early bearing fault feature extraction based on CEMP time-frequency features[J]. Journal of Vibration and Shock, 2020, 39(19): 168-173

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