THE MINIMUM NUMBER OF FEEDBACK STATE VARIABLES FOR THE DECOUPLING CONTROL OF A BINARY DISTILLATION COLUMN

In this paper, it is shown what influences remain in a controlled system if the decoupling controller is designed by using incomplete state variable feedback. A sufficient condition for the existence of a decoupling controller based on the incomplete state variable feedback is derived by using the special structure of the model. It is also shown for a binary distillation column that only five state variables (1st, 2nd, 3rd, (n-l)-th, n-th) need be fed back for design of a decoupling controller.