基于角域四阶累积量切片谱的柴油机连杆轴承故障特征提取

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (11) : 90-94.

论文

基于角域四阶累积量切片谱的柴油机连杆轴承故障特征提取

沈虹1, 2，赵红东1，梅检民2，赵慧敏2，张大鹏2，任金成2

作者信息 +

Feature extraction of connecting rod bearing fault of diesel engine based on angle area fourth-order cumulant slice spectrum

SHEN Hong1,2，ZHAO Hong-dong1，MEI Jian-min2，ZHAO Hui-min2， ZHANG Da-peng2，REN Jin-cheng2

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文章历史 +

摘要

提出了一种角域四阶累积量切片谱方法，应用于提取连杆轴承微弱故障特征。首先，对升速过程振动信号进行阶比重采样得到角域平稳信号，再计算其四阶累积量对角切片谱，构成角域四阶累积量切片谱，用于分析不同转速区间、不同测试位置下的非稳态信号，提取连杆轴承微弱故障特征。试验结果表明：角域重采样与四阶累积量对角切片谱相结合，既能分析非稳态信号，又能抑制噪声干扰；特定阶比带内的角域四阶累积量对角切片谱的能量和峰值，能有效识别连杆轴承各种技术状态，可以作为连杆轴承磨损故障的特征参数；并得出了敏感测试位置、敏感转速区间和特征阶比带。

Abstract

A method based on angle area fourth-order cumulant slice spectrum is proposed to extract weak fault feature of connecting rod bearing. First, the unstable accelerating vibration signal is order re-sampled and the stabilized signal is obtained at the angle area, then the fourth-order cumulant diagonal slice spectrum is calculated to constitute the angle area fourth-order cumulant slice spectrum, which used to analysis unstable signals with different rotate speed section and different test position to extract weak fault feature of connecting rod bearing. Experimental result shows that the combination of angle re-sampled and the fourth-order cumulant diagonal slice spectrum could both to analyze unstable signals, but also suppress noise interference; the power and peak value of angle area fourth-order cumulant slice spectrum with certain order band could distinguish connecting rod bearing with different status effectively, it could be used as feature parameter to extract connecting rod bearing fault; the sensitive test position and rotate speed section and the feature order band were obtained.

导出引用

沈虹;;赵红东;梅检民;赵慧敏;张大鹏;任金成. 基于角域四阶累积量切片谱的柴油机连杆轴承故障特征提取[J]. 振动与冲击, 2014, 33(11): 90-94

SHEN Hong;ZHAO Hong-dong;MEI Jian-min;ZHAO Hui-min;ZHANG Da-peng;REN Jin-cheng. Feature extraction of connecting rod bearing fault of diesel engine based on angle area fourth-order cumulant slice spectrum [J]. Journal of Vibration and Shock, 2014, 33(11): 90-94