约束控制偏差处理及其在精馏塔预测控制中的应用  

Error Treatment in Constrained Control and Its Application to MPC of Rectifier

作　　者：罗雄麟[1] 左信[1] 陈常恒[1] 青红英[1] 

机构地区：[1]石油大学自动化研究所,北京昌平102249

出　　处：《化工自动化及仪表》2002年第3期11-14,共4页Control and Instruments in Chemical Industry

摘　　要：针对约束控制中输出偏差处理方法 ,一改过去约束区间内输出偏差为 0、区间外为e =ysp -y的简单处理方法 ,提出的新方法可以避免在约束边界上跳变 (偏差函数连续 )、保证测量值尽量往中心给定值靠近。所提偏差处理方法用于精馏塔多变量预测控制的仿真实验 ,显示出该方法的重要性和对控制结果的影响。输出偏差处理方法已成功应用于乙烯精馏塔多变量预测控制的工程实践中。A method was proposed in the paper that the output error curve in constraint zone is between(y sp -y)by setpoint control and zero by conventional treatment for constrained control,and can be designated with an exponent n(≥1)for different purposes.The jump can be avoided at the constraint boundary.The measures of controlled variables can approach the center setpoint as soon as possible.The importance and effect were obvious by simulating model predictive control(MPC)of a rectifier.The treatment was succeeded in MPC of commercial ethylene ethane rectifier.

关 键 词：偏差处理 精馏塔 约束控制 输出偏差 过程控制 预测控制 精馏 

分 类 号：TQ051.81[化学工程] TP273[自动化与计算机技术—检测技术与自动化装置]