摘要
作为一种基于对象阶跃响应的预测控制算法,动态矩阵控制在性能指标函数中通过对跟踪误差的优化及对控制量增量的软约束来保证控制的性能,指标函数中并没有考虑跟踪误差变化率对系统动态响应的影响.为了使对象具有更好的动态响应,笔者基于优化性能指标函数中的跟踪误差项,在指标函数中引入跟踪误差的微分项,提出一种改进动态矩阵控制算法,使得对象的动态响应更加平稳,闭环系统的鲁棒性更强.理论分析和计算机仿真结果表明了改进后的算法使系统具有更好的控制品质.
As a kind of predictive control algorithms based on step response, dynamic matrix control algorithm ensure system’s control characteristic via optimizing track error and restricting increment of the control signal. It does not calculate the influence upon system dynamic response made by track error rate. For a better system dynamic characteristic, based on the item of track error in optimal cost index function, this paper presents an improved DMC predictive control algorithm which makes the system dynamic characteristic be better via introducing differential item of track error in index function. The study of theory analysis and computer simulation shows that the ability of controller has been improved greatly.
出处
《重庆大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2005年第6期71-73,共3页
Journal of Chongqing University
基金
重庆市科委科技攻关项目(CSTC
2004BB2165)
关键词
动态矩阵控制
优化性能指标函数
跟踪误差
dynamic matrix control
optimal cost characteristic index function
track error