基于改进IMC的开环不稳定时滞过程控制  

Comtrol for Open-loop Unstable Plus Dead-time Processes Based on Modified Internal Model Control

作　　者：朱宏栋[1] 邵惠鹤[1] 

机构地区：[1]上海交通大学自动化系,上海200030

出　　处：《控制与决策》2005年第7期727-731,共5页Control and Decision

基　　金：国家863计划项目(2001AA413130).

摘　　要：针对开环不稳定对象,在传统内模控制结构中增加了一个预稳定控制器,提出了改进的内模控制结构,给出了闭环系统内稳定判定定理;更重要的是提出一个综合闭环性能和相角裕度的指标函数,将该指标函数最大化,可获得在不同归一化时滞情况下的优化预稳定控制器整定参数,并拟合出公式.最后,与国际上最新发表的控制方法进行了对比,显示了该方法的优越性.A modified internal model control scheme is proposed to control open-loop unstable plus dead-time processes, which contains an additional PD controller to pre-stabilize the unstable process. The internal stability of the closed-loop system is analyzed. More important, a specification function that makes a tradeoff between the closed-loop performance and phase margin is given. Through maximizing the specification function, the optimal tuning parameters of PD controller is obtained. Simulations show that the proposed method is superior to the latest published methods.

关 键 词：不稳定时滞过程 改进内模控制 优化整定 

分 类 号：TP273.2[自动化与计算机技术—检测技术与自动化装置]