| 抑制EMD端点效应方法的研究 |
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| 引用本文： | 许宝杰,张建民,徐小力,李建伟.抑制EMD端点效应方法的研究[J].北京理工大学学报,2006,26(3):196-200. |
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| 作者姓名： | 许宝杰 张建民 徐小力 李建伟 |
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| 作者单位： | 北京理工大学,机械与车辆工程学院,北京,100081;北京机械工业学院,北京市机电系统测控重点实验室,北京,100085;北京理工大学,机械与车辆工程学院,北京,100081;北京机械工业学院,北京市机电系统测控重点实验室,北京,100085 |
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| 基金项目： | 中国科学院资助项目
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北京市自然科学基金 |
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| 摘 要： | 基于经验模态分解的Hilbert-Huang变换在分解过程中产生端点效应,使得信号两端点附近出现失真问题,提出对端点效应进行抑制的多种方法. 对全局统计平均法、平行线段延拓极值法、多项式拟合法、镜像延拓法、神经网络延拓法等抑制方法进行对比研究. 仿真和实验结果表明,端点效应得到有效抑制,Hilbert-Huang变换的分析性能得到改善.
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| 关 键 词： | Hilbert-Huang变换 经验模态分解(EMD) 端点效应 |
| 文章编号： | 1001-0645(2006)03-0196-05 |
| 收稿时间： | 06 21 2005 12:00AM |
| 修稿时间： | 2005年6月21日 |
A Study on the Method of Restraining the Ending Effect of Empirical Mode Decomposition (EMD) |
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| XU Bao-jie,ZHANG Jian-min,XU Xiao-li and LI Jian-wei.A Study on the Method of Restraining the Ending Effect of Empirical Mode Decomposition (EMD)[J].Journal of Beijing Institute of Technology(Natural Science Edition),2006,26(3):196-200. |
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| Authors: | XU Bao-jie ZHANG Jian-min XU Xiao-li and LI Jian-wei |
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| Institution: | 1. School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China; 2. Measurement and Control of Mechanical and Electrical System Key Lab of Beijing, Beijing Institute of Machinery, Beijing 100085, China |
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| Abstract: | Ending effect is produced in the decomposition process of empirical mode decomposition(EMD) based Hilbert-Huang transformation.It leads to distortion near the two end points of the signal processed.Several methods of restraint aimed at ending effect are proposed.Comparison has been made among the global average statistic method,the parallel line extending method,the polynomial curvefitting method,the mirror extending method and the neural networks extending method.As a result of simulation and experiment,it is shown that ending effect can be effectively restrained. |
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| Keywords: | Hilbert-Huang transformation empirical mode decomposition(EMD) ending effect |
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