基于FCS的控制技术研究

Survey on Control Research of Networked Control Systems Based of Field Bus

基于现场总线的网络控制系统已成为自动化技术发展热点之一,因涉及到网络通信与控制方面的问题,相对比较复杂。近几年来,这种系统在实际过程控制中发挥了很好的作用,但理论研究相对滞后,本文从控制方面总结了国内外这种系统的理论研究成果,并且介绍了几种网络环境下控制器的设计方法,最后展望网络控制技术的发展方向。

In view of control,the research background and contents on the networked control systems based of field bus are introduced in this paper.Networked control systems is a discipline as the combination of network and control science which covers a wide subjects.First, the three mathematic models of networked control systems are discussed,which consist of short network-induced delay with the controller time or event driven,and long network-induced delay with the controller event driven.Second,the mean value controllability, mean square controllability, mean value observability and mean square observability of networked control systems are analyzed. Third,several methods of controller design under the conditions of networked systems are intrduced.Finally,a further discussion on performance improvement of networked control systems in the furture is proposed.