| Hilbert-Huang变换中的模态混叠问题 |
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| 引用本文： | 曹莹,段玉波,刘继承.Hilbert-Huang变换中的模态混叠问题[J].振动．测试与诊断,2016,36(3):518-523. |
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| 作者姓名： | 曹莹 段玉波 刘继承 |
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| 作者单位： | （东北石油大学电气信息工程学院，大庆163318） |
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| 基金项目： | （黑龙江省长江学者后备支持计划资助项目（2012CJHB005）；黑龙江省教育厅科学技术研究资助项目（12531063） |
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| 摘 要： | 希尔伯特-黄变换(Hilbert-Huang transform,简称HHT)存在的模态混叠现象严重影响了实际应用效果。在分析研究HHT原理及模态混叠产生机理的基础上,提出了基于形态滤波预处理与端点延拓相结合的方法抑制模态混叠现象。与集合经验模态分解(ensemble empirical mode decomposition,简称EEMD)方法比较,所提出的方法能够更快速、准确地分解出表征信号的本征模态函数(intrinsic mode function,简称IMF)分量。将该方法应用于滚动轴承的实测信号分析,结果表明,该方法在实际应用中同样具有很好的模态混叠抑制效果。
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| 关 键 词： | 经验模态分解 模态混叠 形态滤波 端点延拓 |
Research and Application of Mode-Mixing in Hilbert-Huang Transform |
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| Cao Ying,Duan Yubo,Liu Jicheng.Research and Application of Mode-Mixing in Hilbert-Huang Transform[J].Journal of Vibration,Measurement & Diagnosis,2016,36(3):518-523. |
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| Authors: | Cao Ying Duan Yubo Liu Jicheng |
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| Affiliation: | (School of Electrical and Information Engineering, Northeast Petroleum University Daqing, 163318, China) |
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| Abstract: | Mode mixing in the Hilbert-Huang transform (HHT) significantly impacts its application. An improved method of endpoint extension after signal preprocessing with morphological filtering is proposed to restrain the mode-mixing. The analysis results demonstrate that the proposed method can extract the intrinsic mode function (IMF) components more quickly and exactly compared with ensemble empirical mode decomposition (EEMD). The test on the real signal analysis of rolling bearing shows that the method can effectively restrain mode-mixing in practical applications. |
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| Keywords: | ensemble empirical mode decomposition(EEMD) mode mixing morphological filtering endpoint extension |
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