| 几种局域波分解方法的比较研究 |
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| 引用本文： | 盖强,马孝江,张海勇,邹岩崑.几种局域波分解方法的比较研究[J].系统工程与电子技术,2002,24(2):57-59. |
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| 作者姓名： | 盖强 马孝江 张海勇 邹岩崑 |
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| 作者单位： | 1. 大连理工大学振动工程研究所,辽宁,大连,116023;大连舰艇学院模拟中心,辽宁,大连,116018
2. 大连理工大学振动工程研究所,辽宁,大连,116023 |
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| 摘 要： | 基于Hilbert变换的局域波法 ,能得到信号有意义的瞬时频率。它的分解基是随动态信号波形的变化而变化 ,具有自调节自适应的特征 ,因此能在时频域内描述非平稳非线性信号的局部特性。提出的局域中值定理分解方法 ,能正确求出并分离包含在信号中的局域中值 ,从而得到更标准的信号基本模式分量。通过与其它几种局域波信号分解方法的比较 ,发现局域中值定理分解方法性能更优
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| 关 键 词： | 非平稳非线性信号分析 时频分析 瞬时频率 局域波法 |
| 文章编号： | 1001-506X(2002)02-0057-03 |
| 修稿时间： | 2000年11月21 |
Comparing Study for Decomposing Methods Using Local Wave Method |
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| GAI Qiang\\{,\},MA Xiao jiang\,ZHANG Hai yong\\{,\},ZOU Yan kun\.Comparing Study for Decomposing Methods Using Local Wave Method[J].System Engineering and Electronics,2002,24(2):57-59. |
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| Authors: | GAI Qiang\\{ \} MA Xiao jiang\ ZHANG Hai yong\\{ \} ZOU Yan kun\ |
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| Institution: | GAI Qiang\+\{1,2\},MA Xiao jiang\+1,ZHANG Hai yong\+\{1,2\},ZOU Yan kun\+1 |
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| Abstract: | A meaningful instantaneous frequency for complicated signals can be obtained by the local wave decomposition method based on the Hilbert transform. Since the decomposition bases can vary with the local features of dynamic signals, the method is a daptive , therefore, highly efficient for describing nonlinear and non?stationary signals. By using the local mean value theory decomposition method discussed in this paper, the local mean value imbedded in complicated signals can be separated, and better standard 'intrinsic mode functions' of complicated signals can be obtained. Through comparing with other existed local wave decomposition methods, we can find the local mean value theory decomposition method is the best of all. |
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| Keywords: | Non-stationary nonlinear signal analysis Time frequency analysis Instantaneous frequency Local wave method |
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