基于Hammerstein-Wiener逆模型补偿的预测控制非线性变换策略  

Nonlinear transformation strategy of predictive control based on Hammerstein-Wiener inverse model compensation

作　　者：孙浩杰[1,2,3] 邹涛 张鑫[1,2] 惠存万[4] SUN Hao-jie;ZOU Tao;ZHANG Xin;HUI Cun-wan(Key Laboratory of Networked Control System,Chinese Academy of Sciences/Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang Liaoning 110016,China;Institutes for Robotics and Intelligent Manufacturing,Chinese Academy of Sciences,Shenyang Liaoning 110016,China;University of Chinese Academy of Sciences,Beijing 100049,China;Fushun Petrochemical Company of CNPC,Fushun Liaoning 113009,China)

机构地区：[1]中国科学院沈阳自动化研究所/中国科学院网络化控制系统重点实验室,辽宁沈阳110016 [2]中国科学院机器人与智能制造创新研究院,辽宁沈阳110016 [3]中国科学院大学,北京100049 [4]抚顺石化公司烯烃厂,辽宁抚顺113009

出　　处：《控制理论与应用》2020年第4期705-712,共8页Control Theory & Applications

基　　金：国家重点研发计划项目(2016YFF0101700-04);国家自然科学基金项目(61773366,61533015)资助。

摘　　要：针对一类Hammerstein-Wiener模型描述的非线性控制系统,提出一种基于逆模型补偿的预测控制策略.在控制优化计算中,利用Wiener非线性环节的逆模型分别对系统输出设定值和采样值进行变换;控制实施过程中,将控制器输出操作量经过Hammerstein静态非线性环节模型逆变换后施加到实际被控对象上,通过两次逆变换,使得标称模型下控制器输出与闭环系统中线性环节的输入相一致.通过非线性变换补偿将非线性过程的控制转化为线性系统控制,避免了对非线性模型进行优化计算量大及预测不准确的问题.最后通过仿真验证了所提方案的可行性及有效性.This work focuses on the nonlinearity control system which is descripted by Hammerstein-Wiener model,and proposes a model predictive control strategy bases on compensation of inverse model.During the calculation of optimal control,an anti-model of Wiener nonlinearity unit is used to set the output setting values and the sample values,and in the control process,the controller output is applied to the actual controlled object after the inverse transformation by the static nonlinear Hammerstein link model.Through the above two inverse transformation,which could ensure the output of the controller consistent with the input of the linearity unit in the closed-loop system.Nonlinear transform compensation method is utilized to transform nonlinear process control into linear system control,which avoid large computation and inaccurate prediction in optimizing the nonlinear model directly.Finally,the feasibility and effectiveness of the proposed scheme are verified by simulation.

关 键 词：HAMMERSTEIN-WIENER模型 逆模型 非线性系统 模型预测控制 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]