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.