Abstract
Combining refined composite multiscale fuzzy entropy (RCMFE) and support vector machine (SVM) with particle swarm optimization (PSO) for diagnosing roller bearing faults is proposed in this paper. Compared with refined composite multiscale sample entropy (RCMSE) and multiscale fuzzy entropy (MFE), the smoothness of RCMFE is superior to that of those models. The corresponding comparison of smoothness and analysis of validity through decomposition accuracy are considered in the numerical experiments by considering the white and 1/f noise signals. Then RCMFE, RCMSE and MFE are developed to affect extraction by using different roller bearing vibration signals. Then the extracted RCMFE, RCMSE and MFE eigenvectors are regarded as the input of the PSO-SVM to diagnose the roller bearing fault. Finally, the results show that the smoothness of RCMFE is superior to that of RCMSE and MFE. Meanwhile, the fault classification accuracy is higher than that of RCMSE and MFE.
摘要
提出了一种结合精细复合多尺度模糊熵和采用粒子群优化支持向量机滚动轴承故障诊断模型。 通过使用白噪声和 1/f 噪声的数值仿真实验中比较**滑度和分解精度的有效性, 与精细复合多尺度样 本熵和多尺度模糊熵相比, 精细复合多尺度模糊熵的**滑度优于这些模型。随后使用精细复合多尺度 模糊熵, 精细复合多尺度样本熵和多尺度模糊熵对不同状态的滚动轴承振动信号进行特征提取, 将提 取的特征向量作为粒子群优化的支持向量机的输入实现滚动轴承故障诊断。实验结果表明, 精细复合 多尺度模糊熵的**滑度优于精细复合多尺度样本熵和多尺度模糊熵, 同时, 故障分类精度高于精细复 合多尺度样本熵和多尺度模糊熵。
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Foundation item: Projects(CityU 11201315, T32-101/15-R) supported by the Research Grants Council of the Hong Kong Special Administrative Region, China
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Xu, F., Tse, P.W. A method combining refined composite multiscale fuzzy entropy with PSO-SVM for roller bearing fault diagnosis. J. Cent. South Univ. 26, 2404–2417 (2019). https://doi.org/10.1007/s11771-019-4183-7
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DOI: https://doi.org/10.1007/s11771-019-4183-7
Key words
- refined composite multiscale fuzzy entropy
- roller bearings
- support vector machine
- fault diagnosis
- particle swarm optimization