多变量解耦内模控制器的设计  

Design of Internal Model Decoupling Control for Multi-variable System

作　　者：靳其兵[1] 孙晓天[1] 张瑶[2] 王再富[1] 任士兵[1] 

机构地区：[1]北京化工大学信息科学与技术学院,北京100029 [2]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《控制工程》2010年第5期571-574,共4页Control Engineering of China

基　　金：国家863资助项目(2008AA042131)

摘　　要：针对一般多变量解耦控制器将解耦与控制器分别设计所造成的误差问题,提出将内模解耦与控制器一起设计的多变量解耦内膜控制器设计方法。该方法让控制器同时扮演解耦补偿器和内模控制器的角色。首先通过解耦分析和稳态误差分析,使得控制器的设计过程不需要对模型进行降阶就可达到理想的控制效果,再详细推导控制器的设计,得到控制器设计的一般通式,保证了控制器的物理实现,同时增强了系统的鲁棒性。仿真结果表明,该控制器较一般的解耦控制器鲁棒性好,设计简单,是消除多变量系统的解耦过程与控制器设计之间误差的一种可行方法,且该方法已在燕山石化常减压项目得到应用,效果非常好。A decoupling internal model controller（IMC） design method that considers the decoupling and the controller together is proposed.The traditional decoupling controller designs the decoupling and the controller separately,which creates the serious error.The proposed method allows the controller to play a decoupling compensator and the role of internal model controller at the same time.Through the decoupling analysis and steady-state error analysis,the controller design process that does not require reduced-order model can achieve the desired control effect.The general formula of controller is obtained by deriving the IMC controller in detail,which guarantees the controller physics realization,and strengthens the system robustness.The simulation results show that the controller is more robust than general decoupling controller,and can eliminate error in multi-variable system between the process of decoupling and the controller design.The method is applied to Yanshan Petrochemical atmospheric projects effectively.

关 键 词：多变量 内模 解耦 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]