| 基于小波包分解的非线性时变系统辩识 |
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| 引用本文： | 罗晓,陈耀,孙优贤.基于小波包分解的非线性时变系统辩识[J].高校应用数学学报(A辑),2004,19(1):51-56. |
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| 作者姓名： | 罗晓 陈耀 孙优贤 |
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| 作者单位： | 上海工程技术大学,电子电气工程学院,上海,200336;GE中国技术中心,上海,201203;浙江大学,工业控制技术国家重点实验室,浙江,杭州,310027 |
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| 摘 要： | 在实际应用中，经常会碰到非线性时变系统，它们的辨识和建模比较困难．本文采用时变Hammerstein模型描述时变非线性系统．该模型可以以较简单的方式刻划系统的时变特性和非线性特性．然后用小波包对时变系数进行展开，把时变系统的辨识转化为对时不变系数的辨识．
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| 关 键 词： | 时变系统 系统辨识 小波包 最佳基 |
| 文章编号： | 1000-4424(2004)01-0051-06 |
Time-varying nonlinear system identification based on wavelet packet |
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| LUO Xiao,CHEN Yao,SUN You-xian.Time-varying nonlinear system identification based on wavelet packet[J].Applied Mathematics A Journal of Chinese Universities,2004,19(1):51-56. |
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| Authors: | LUO Xiao CHEN Yao SUN You-xian |
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| Institution: | LUO Xiao1,CHEN Yao2,SUN You-xian3 |
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| Abstract: | The difficulty in identifying time-varying systems arises from the fact that the model parameters change for each input/output observation pair.This paper models time-varying nonlinear system using time-varying Hammerstein model.The model characterizes time-varying nonlinear system in a simple way.Expanding time varying coefficients onto a finite set of wavelet packet sequence,the problem then becomes time invariant with respect to the parameters of expansion. |
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| Keywords: | time-varying nonlinear system wavelet packet best basis identification |
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