中国机械工程Issue(12)：1616-1623,8.DOI:10.3969/j.issn.1004-132X.2014.12.011
基于边界特征尺度匹配延拓的EMD改进方法及应用
Improved Method of EMD and Its Applications Based on Boundary Characteristic Scale Matching Extension Method
摘要
Abstract
For the end effects of EMD ,an improved extension method was proposed based on boundary local features .By calculating the mathcing errors between the boundary wave and any inter-nal signal wave ,the regularity strength of signal was determined .In the case that the inherent regular-ity was strong ,the internal wave form matching extension was conducted to maintain the inherent tendency to the greatest extent .While the signal was weak regularity and the signal edge was changed abnormally ,the local information at the edges was considered only to conduct the extreme point exten-sion .Thus the extreme points were used to fit envelope curve to realize extension .This method en-sures that the decomposition of valid data is correct ,and improves the decomposition accuracy .Simu-lation results show that the method can suppress end effect of EMD method .关键词
EM D/端点效应/特征尺度延拓/轧机扭振信号Key words
empirical mode decomposition(EMD)/end effect/characteristic scale extension/tor-sional vibration signal of rolling mill分类
机械制造引用本文复制引用
时培明,蒋金水,刘彬,王俊..基于边界特征尺度匹配延拓的EMD改进方法及应用[J].中国机械工程,2014,(12):1616-1623,8.基金项目
国家自然科学基金资助项目（51104129，51005196）；河北省自然科学基金资助项目（E2012203194）；河北省高等学校科学技术研究项目 （）
