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A control scheme is proposed in the present paper that introduces Two Degree of Freedom (2-DOF) controller to eliminate the effect of disturbances while tracking the desired trajectory, for Two-Input Two-output (TITO) systems, by implementing an original method that infuses three techniques such as the model order reduction, optimization and the approximate model matching techniques. From authors’ knowledge, first time in literature, the objective of this kind of a proposed method is to accomplish a single low order 2-DOF controller, which can handle desired tracking and disturbance rejection simultaneously, using AGTM/AGMP matching method combined with optimization technique. The desired specifications for achieving the set-point tracking may be encompassed inside what resembles a transfer function matrix. This method is directed at ensuring that the closed loop system is stabilized by implementing a 2-DOF controller while also guaranteeing that it is capable of exhibiting the specified performance standards. This method is cost-effective, computationally simple, easy to implement and can be used for the design without any restriction in the structure/order of the model closed loop transfer function or 2-DOF controller. The efficacy of the proposed methodology is realized when it is performed on coupled tank process.

Novel Two Degree of Freedom Model Matching Controller for Desired Tracking and Disturbance Rejection