一类网络化串级控制系统的性能分析  

Performance Analysis for a Class of Networked Cascade Control System

作　　者：黄从智[1] 白焰[1] 刘向杰[1] 

机构地区：[1]华北电力大学自动化系,北京102206

出　　处：《化工自动化及仪表》2009年第5期34-39,共6页Control and Instruments in Chemical Industry

基　　金：国家自然科学基金资助项目(60974051);北京市教育委员会共建项目专项资助

摘　　要：基于工业过程控制实际,引入了网络化串级控制系统的概念,并指出了网络化串级控制系统的四种典型拓扑结构。针对其中的一类具有不同性质网络诱导时延的网络化串级控制系统,研究了将传统的离散时间控制方法应用于网络化串级控制系统闭环系统建模的可行性。将控制方法分为同步和异步两种,提出了系统的性能损失指标,同步和异步控制时的系统仿真结果表明异步控制所得到的性能优于同步控制的性能。从而推导出结论网络化串级控制系统的分析与设计需要更多的异步控制方法。Based on practical industrial process control,the concept of networked cascade control system(NCCS) was introduced.Four typical configurations of NCCSs were presented and the locations of the network-induced delays were pointed out.Aimed at one type of NCCS with different properties of delays,the feasibility of applying traditional discrete time control methods in the modeling of the NCCS closed-loop system was investigated.The actuation mode was divided into synchronous and asynchronous actuation,and a performance loss criterion was proposed.A simulation example was given to show that the performance of control loops in an NCCS using methods depending on the asynchronous actuation was better than those relying on the synchronous actuation.This leads to a conclusion that it is necessary to develop more control methods supporting the asynchronous actuation.

关 键 词：网络化串级控制系统 结构 网络诱导时延 性能分析 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]