De-Coupler Design for an Interacting Tanks System

Abstract

The dynamic behavior of two interacting system was studied by the introduction of a step change in inlet flow rate and with the development of the suitable mathematical model of this interacting system. This paper describes how the effect of the interaction of this interacting system is eliminated by the design of the suitable de-coupler for the system. This paper also includes the analysis of the interacting loops between the controlled variable that is liquid level and manipulated variable that is inlet flow rate by the help of relative gain array. The result exemplifies that the gain of each loop is reduced approximately half when the opposite loop is closed and the gain of other loop changes the sign when the opposite loop is closed. Thus the de- coupling method illustrate that it is one of the suitable method for the reduction of the interaction in the tanks system.