一种多变量系统的内模解耦控制设计方法

针对多变量强耦合的被控系统，提出了一种简化的内模解耦控制设计方法。其宗旨是首先根据对象的名义模型，设计常数阵预补偿器，对其进行对角优势化，进而利用补偿后的主对角线元素作为内模控制设计的内部模型，并基于此内部模型设计多通道内模控制器，同时设计了对角形滤波器。对某加热炉温度控制系统的仿真研究结果表明了该方法的有效性，控制系统具有很好的解耦能力和较强的鲁棒性。算法简单，易于实现，具有较好的工程应用价值。

New Design of Internal Model Decoupling Control for Multi-variable System

In view of strong coupling system, a kind of simple internal model decoupling control designing method is presented. First it is based on nominal model of the object to design constant compensating matrix, in order to obtain a diagonal dominant generalized system. Then the compensated diagonal elements are used as internal model to design internal model controller based on IMC theory and diagonal filter is designed at the same time. The simulation for a heating furnace temperature control system shows that the method is effective and it is superior to the general method in decoupling capability and roubustness. The algorithm is simple and easy to be realized. It has good application value in engineering practice.