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基于奇异值差分谱降噪与经验模式分解的滚动轴承故障特征提取方法
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国家自然科学基金资助项目(21366017);内蒙古科技厅高新技术领域科技计划重大项目(20130302)


Singular Values Difference Spectrum Denoising Combined with Empirical Mode 〖JZ〗Decomposition Based Rolling Bearing Fault Feature Extraction Method
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    摘要:

    针对滚动轴承振动信号含有大量噪声且具有非线性、非平稳特性致使故障特征难提取的问题,提出一种基于奇异值差分谱降噪与经验模式分解(EMD)相结合的滚动轴承故障特征提取方法。首先,将滚动轴承振动信号在相空间重构的基础上利用奇异值差分谱完成降噪;其次,将降噪后的信号经EMD筛分为多个含有信号局部特征的本征模式分量(IMF);最后对与原信号相关度最大的IMF进行Hilbert包络解调,进而提取故障特征频率。实验结果表明:该方法不仅有效去除信号噪声,而且准确提取滚动轴承的故障特征。

    Abstract:

    Aimed at the problems of rolling bearing vibration signal contained a lot of noise and presented the characteristics of nonlinear, nonstationary and etc., which brought a great difficulty for accurate fault feature extration, a novel rolling bearing fault feature extraction method based on singular values difference spectrum denoising combined with empirical mode decomposition (EMD) was put forward. In the first place, the signal was reconstructed in phase space and then the singular values difference spectrum theory was used to realize denoising. After that, several intrinsic mode components (IMF) containing local signal characteristics were obtained by performing EMD on the denoised signal. Finally, performed Hilbert envelope demodulation on the largest correlated IMF and original signal, fault feature characteristic frequency was extracted. The experimental result shows that the method can not only effectively denoising the signal, but also accurately extract the fault feature information of rolling bearing.

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秦波,刘永亮,王建国,杨云中,马俊平,郭慧丽.基于奇异值差分谱降噪与经验模式分解的滚动轴承故障特征提取方法[J].机床与液压,2016,44(11):168-172.
. Singular Values Difference Spectrum Denoising Combined with Empirical Mode 〖JZ〗Decomposition Based Rolling Bearing Fault Feature Extraction Method[J]. Machine Tool & Hydraulics,2016,44(11):168-172

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  • 在线发布日期: 2016-07-07
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