一类大时滞不稳定对象的PID控制器设计  

The PID Controller Design for Unstable Process with Large Dead Time

作　　者：张文英[1] 蔡秋花[1] 陈凤祥[1] 马菲[1] 

机构地区：[1]上海交通大学自动化系,上海200240

出　　处：《微计算机信息》2009年第4期7-9,共3页Control & Automation

摘　　要：针对工业过程控制中一类常见的一阶大时滞不稳定对象不易控制的问题,本文首先采用内模控制和控制器参数化原理,提出一种简单PID控制器的解析设计方法。然后引入一个调节参数,对PID控制器结构进行改进,参数的引入不仅没有改变控制系统的内稳定性,反而提高了系统的动态响应性能。最后分析了系统的鲁棒性能,得到了闭环控制系统满足鲁棒稳定性的充分必要条件。仿真实例结果表明,本文设计的控制器减小了控制系统的调节时间和超调量,而且系统具有很好的动态响应性能和鲁棒性。In order to solve the control problem of the first degree unstable industrial processes with large dead time, firstly, based on the Internal Model Control and controller parameterization principle, a new simple PID controller of analytical design scheme is proposed. Then, the dynamic performance of the control system is improved by importing a regulated parameter to modify the structure of the PID controller without having influence on the internal stability. A sufficient and necessary condition is also devised to guarantee the close-loop control system to be robustly stable. The simulation results show that the proposed analytical controller design scheme achieves shorter rise-time and smaller over-shoot, better dynamic performance and robustness is also provided for the first order unstable processes with large dead time.

关 键 词：不稳定对象 大时滞 控制器参数化 内模控制 鲁棒稳定性 

分 类 号：TL361[核科学技术—核技术及应用]