改进增强峭度图和增强包络谱在滚动轴承故障诊断上的应用

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (13) : 53-58.

论文

改进增强峭度图和增强包络谱在滚动轴承故障诊断上的应用

唐贵基，王晓龙，邓飞跃

作者信息 +

Application of Improved Enhanced Kurtogram and Enhanced Envelope Spectrum in Fault Diagnosis for Rolling Bearings

Tang Guiji，Wang Xiaolong，Deng Feiyue

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文章历史 +

摘要

针对滚动轴承故障诊断问题，在分析了基于二进制小波包分解的增强峭度图方法的不足后，提出了基于谐波小波包分解的改进增强峭度图方法。通过计算故障信号的改进增强峭度图，筛选出峭度值最大的最优节点，利用最优节点处的谐波小波包系数进行信号重构，并对重构信号做增强包络谱分析，利用故障特征频率的理论计算值与增强包络谱中峰值明显的谱线进行对比，从而对轴承故障类型做出判断。运用本文提出的诊断方法分别对滚动轴承内圈故障模拟、实测信号进行分析，结果表明，该方法具有一定的可靠性，能够满足实际的工程需要。

Abstract

To effectively extract the fault features of rolling bearings, an improved enhanced Kurtogram method based on harmonic wavelet packet decomposition was presented after analyzing the shortcoming of enhanced Kurtogram method based on binary wavelet packet decomposition. The node with the maximum kurtosis value could be selected after the improved enhanced Kurtogram of fault signal was computed, then used the harmonic wavelet packet coefficient of the optimal node to reconstruct the signal and analyzed the reconstructed signal by enhanced envelope spectrum. The fault type of rolling bearing could be judged by comparing the theoretical calculation value of fault characteristic frequency with spectral lines whose amplitude were obvious in enhanced envelope spectrum. Simulated inner fault signal and measured inner fault signal of rolling bearings were analyzed by this proposed method, and the diagnosis results showed that the new method was reliable and could meet the actual requirements.

导出引用

唐贵基;王晓龙;邓飞跃. 改进增强峭度图和增强包络谱在滚动轴承故障诊断上的应用[J]. 振动与冲击, 2014, 33(13): 53-58

Tang Guiji;Wang Xiaolong;Deng Feiyue. Application of Improved Enhanced Kurtogram and Enhanced Envelope Spectrum in Fault Diagnosis for Rolling Bearings[J]. Journal of Vibration and Shock, 2014, 33(13): 53-58