一种新型非线性Hammerstein系统动态矩阵控制算法  

A novel nonlinear Hammerstein system dynamic matrix control algorithm

作　　者：邹志云[1] 于德弘[1] 郭宁[2] 于鲁平[2] 王喜芹[2] 冯文强[2] 

机构地区：[1]西安交通大学机械工程学院,陕西西安710049 [2]防化研究院,北京102205

出　　处：《计算机与应用化学》2008年第4期432-436,共5页Computers and Applied Chemistry

基　　金：国家留学基金(21302095)

摘　　要：将动态矩阵控制策略(DMC)推广到由一个非线性静态多项式函数和一个线性动态阶跃响应环节组成的非线性Ham- merstein系统,详细地给出了该新型非线性Hammerstein系统动态矩阵控制算法(NLH-DMC)。把NLH-DMC应用于一套强非线性pH中和过程,给定值跟踪和抗干扰仿真结果表明,NLH-DMC比线性DMC(LDMC)和过程控制领域常用的非线性PID (NL-PID)具有更好的控制性能。进一步的仿真实验证实,NLH-DMC不仅具有良好的控制响应,而且在存在较大模型误差时仍具有很好的稳定性及鲁棒性。The Dynamic Matrix Control （DMC） strategy is extended to a nonlinear system using Hammerstein model that consists of a static nonlinear polynomial function followed in series by a linear step response dynamic element. A new nonlinear Hammerstein DMC algorithm （named NLH-DMC） is presented in detail. The set point tracking and disturbance rejection simulation results of a strong nonlinear pH neutralization process control show that NLH-DMC gives better control performance than linear DMC （LDMC） and the nonlinear PID （NL-PID） controller commonly used in process industry. Further simulation experiment demonstrates that NLH-DMC not only gives good control response, but also possesses good stability and robustness even existing large modelling errors.

关 键 词：动态矩阵控制(DMC) 非线性模型预测控制(NMPC) HAMMERSTEIN模型 pH过程控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]