Internal Model Control Strategy Based on Multiple Models

In order to cope with changes or sudden changes in the time parameter of models of real processes under different circumstances, internal model control based on multiple models is presented. According to the operating conditions over which the control system is expected to operate, a set of linear models is developed and the controller associated with each model is designed. By means of choosing an appropriate controller at the different load operating scope, the controller can satisfy the control performance specifications over the entire operating conditions of the plant. To meet the demands of complex systems, the employment of internal model control (IMC) improves the robustness of slow time-varying parameter under the same conditions and conquers the time-delay of the object. Simulations show that the method reacts quickly to sudden parameter changes and has strong robustness