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基于Laguerre-FuzzyHammerstein模型的增压锅炉非线性预测控制

, PP. 209-215

Keywords: 自动控制技术,非线性预测控制,增压锅炉,Hammerstein模型

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Abstract:

增压锅炉燃烧系统具有强非线性、大滞后、参数时变和不确定性,传统的控制方法很难取得较好的控制效果。Laguerre滤波网络能够以较低的模型阶次逼近系统线性特性,且无需知道系统的滞后时间;Fuzzy模型能够有效描述系统的非线性及不确定性。提出了基于Laguerre-FuzzyHammerstein模型的非线性预测控制器并应用于增压锅炉燃烧系统控制器设计中。仿真结果表明:在变负荷情况下,本文提出的控制器能够有效控制过热蒸汽压力迅速稳定在设定值;与单输入预测控制器相比,该控制器综合考虑了两非线性变量带来的影响,且有效地避免了因系统变迟延和不确定性带来的影响,证明了本文方法的有效性。

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