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基于EEMD-FSK的滚动轴承故障诊断
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国家自然科学基金联合基金项目(U1708254);国家自然科学基金青年科学基金项目(11702178)


Fault Diagnosis of Rolling Bearing Based on EEMD-FSK
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    摘要:

    为了解决轴承故障特征提取中经验模态分解(EMD)出现的模态混叠现象,提出一种集合经验模态分解(EEMD)、快速谱峭度选频和共振解调技术相结合的滚动轴承故障诊断方法。对原始振动信号进行EEMD处理,分解为多个本征模态函数(IMF);将符合峭度准则的IMF分量筛选出来,对其进行信号重构,对重构信号进行快速谱峭度计算得出快速谱峭度图,从图中选出最优频带中心和带宽,确定FIR带通滤波器设计参数;最后通过共振解调技术对滤波信号进行包络分析,得出包络谱确定滚动轴承故障特征信息。通过滚动轴承实验分析,验证了此方法的可行性。

    Abstract:

    In order to solve the modal aliasing phenomenon of the empirical mode decomposition (EMD) in the bearing fault feature extraction, an ensemble empirical mode decomposition (EEMD), fast spectral kurtosis frequency selection and resonance demodulation technology combined rolling bearing fault diagnosis method was proposed. The original vibration signal was trained by EEMD and it was decomposed into multiple intrinsic mode functions (IMF). The IMF components meeting the kurtosis criterion were screened out, the signals were reconstructed for these components. The fast spectral kurtosis calculation was performed on the reconstructed signal to obtain a fast spectral kurtosis diagram, and the optimal frequency band center and bandwidth were obtained from the diagram, the design parameters of the FIR bandpass filter was determined. Finally, the envelope analysis of the filtered signal was carried out by resonance demodulation technology to obtain the envelope spectrum and determine the fault characteristic information of the rolling bearing. The feasibility of this method was verified through experimental analysis of rolling bearings.

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金志浩,陈广东,汪红,韩林洋.基于EEMD-FSK的滚动轴承故障诊断[J].机床与液压,2023,51(4):180-183.
JIN Zhihao, CHEN Guangdong, WANG Hong, HAN Linyang. Fault Diagnosis of Rolling Bearing Based on EEMD-FSK[J]. Machine Tool & Hydraulics,2023,51(4):180-183

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  • 在线发布日期: 2023-03-16
  • 出版日期: 2023-02-28