| 基于小波变换的非线性广义预测控制 |
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| 引用本文： | 杨青,李树荣.基于小波变换的非线性广义预测控制[J].控制工程,2005(Z2). |
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| 作者姓名： | 杨青 李树荣 |
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| 作者单位： | 中国石油大学信息与控制工程学院 山东东营257061
(杨青)，中国石油大学信息与控制工程学院 山东东营257061(李树荣) |
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| 摘 要： | 提出了基于小波变换的非线性广义预测控制算法。预测模型采用Hammerstein模型,对于其静态非线性部分采用小波网络来辨识,动态线性部分用最小二乘法来辨识。这种辨识方法比传统的多项式拟合的模型误差要小得多。基于这种预测模型广义预测控制器弥补了传统广义预测控制的模型失配问题。以CSTR为例对所设计的控制器进行仿真研究,结果表明控制器能够取得良好的控制效果。
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| 关 键 词： | 非线性系统 非线性广义预测控制 小波网络 CSTR |
Nonlinear Generalized Predictive Control Based on Wavelet Transform |
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| YANG Qing,LI Shu-rong College of Information and Control Engineering,China University of Petroleum,Dongying ,China.Nonlinear Generalized Predictive Control Based on Wavelet Transform[J].Control Engineering of China,2005(Z2). |
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| Authors: | YANG Qing LI Shu-rong College of Information and Control Engineering China University of Petroleum Dongying China |
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| Affiliation: | YANG Qing,LI Shu-rong College of Information and Control Engineering,China University of Petroleum,Dongying 257061,China |
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| Abstract: | A nonlinear generalized predictive controller based on wavelet transformation is proposed. The predictive model of the nonlinear generalized predictive controller is Hammerstein model. The nonlinear static part of the Hammerstein model is identified by wavelet network, and the linear dynamic part is identified by the least square method. Identifying models by using this method has less model error than by using polynomial approximation.The nonlinear generalized predictive control based on wavelet transform can overcome model mismatch which often occurs in traditional generalized predictive control.The tracking properties of the closed loop system are verified by simulation for a sample CSTR. The simulation shows that the controller is valid, and the tracking properties are better than PID controller. |
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| Keywords: | nonlinear system nonlinear generalized predictive control wavelet network CSTR |
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