改进的广义预测控制在PLC上的实现及应用  

Application and Realization of Improved Generalized Predictive Control Based on PLC

作　　者：孙莹[1] 卢文科[1] 石红瑞[1] 李如发[1] 

机构地区：[1]东华大学信息科学与技术学院,上海201620

出　　处：《仪表技术》2013年第10期18-20,23,共4页Instrumentation Technology

摘　　要：改进的广义预测控制算法在继承广义预测控制算法的基本特征和优点的基础上,避免了求解Diophantine方程所带来的大量运算,减少了计算工作量,节省了时间。文中使用Matlab/Simulink对该控制算法进行仿真研究,同时,将所设计的改进的广义预测控制算法,嵌入WinCC全局脚本文件,使用S7-300 PLC作为控制器,应用于"THJFCS-1型现场总线过程控制系统实验装置",对双容水箱的液位进行控制,实验结果表明运用该算法有较快地响应速度,超调量较小,对设定值跟踪表现也良好。Improved Generalized Predictive Control Algorithm avoided solving the Diophantine equation arising from a large number of intermediate operations, thus it reduced the amount of computation, saving a lot of time. At the same time, it also inherited the basic features and advantages of the Generalized Predictive Control Algorithm. The Generalized Predictive Control Algorithm was embedded into the Global Script of WinCC, which is applied to ＂ THJFCS-1 fieldbus system experimental device＂ to control the level of two-tank by using $7-300 PLC. The experiment results showed faster response speed, smaller overshoot and better set point tracking performance can be obtained by using this algorithm. The improved Generalized Predictive Control algorithm does not need the precise mathematical model, and can effectively o- vercome the time-delay. It has good control quality.

关 键 词：改进的广义预测算法 PLC WINCC 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]