基于最小平方距离相关的EMD改进算法及应用

杨 庆;陈桂明;薛冬林

振动与冲击 ›› 2011, Vol. 30 ›› Issue (6) : 62-66.

PDF(2154 KB)
PDF(2154 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (6) : 62-66.
论文

基于最小平方距离相关的EMD改进算法及应用

  • 杨 庆; 陈桂明; 薛冬林
作者信息 +

Improved Method for Empirical Mode Decomposition Based on SSDAwith Application

  • Yang qing; Chen Gui-ming; Xue Dong-lin
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文章历史 +

摘要

包络线的拟合是经验模式分解中的关键一步,但由于信号端点处极值的不确定性导致在信号上下包络线拟合过程中存在着严重的端点效应问题;在分析现有解决端点效应问题方法的基础上提出了基于最小平方距离相关的数据端点处包络线拟合方法。该方法在信号内部寻找与端点处信号变化趋势相关度最高的一段波形,并用此段波形的包络线来重新刻画端点处的包络线。仿真和实际信号的分析证明,基于最小平方距离相关的数据端点处包络拟合方法能够有效的抑制端点效应,算法简单并且易于实现

Abstract

Envelope Fitting is the most important step of Empirical Mode Decomposition, but the end swings exist in the course of getting envelops of the data because of the uncertain extrema near the ends of the data. On the basis of the existed algorithms, Improved Method for Empirical Mode Decomposition Based on SSDA was proposed. The method find the best correlative sequence in the inner data and adopt the optimum sequence to proofread Envelope near the ends of the data. The simulation and experiment results show the method is effective in restraining end effect, furthermore the method is simple and easy to realize

关键词

经验模式分解 / 端点效应 / 包络线 / 最小平方距离相关函数

Key words

Empirical Mode Decomposition / End effect / Envelope / SSDA

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导出引用
杨 庆;陈桂明;薛冬林. 基于最小平方距离相关的EMD改进算法及应用[J]. 振动与冲击, 2011, 30(6): 62-66
Yang qing;Chen Gui-ming;Xue Dong-lin. Improved Method for Empirical Mode Decomposition Based on SSDAwith Application[J]. Journal of Vibration and Shock, 2011, 30(6): 62-66

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