Fractional Order 2-DOF Control for the Non-integer and Integer Order Plants

The study investigates fractional order (FO) two degree of freedom (2-DOF) control for the plants with order which is commensurate and non-commensurate or with integer order (IO). There are shortcomings in the conventional one degree of freedom control where there exists dynamic response performance obtained at the cost of system robustness. With the extra tuning parameter in 2-DOF control, the FO of the pre-filter in this control scheme, not only overcomes the above and improves the servo-control behavior, but also considers the performance of this control technique that is regulatory and the robustness of a system that is controlled in closed loop set-up. Moreover, stability analysis for the plants with order which is non-integer commensurate and non-commensurate or IO plants are demonstrated and validated by illustrative examples. (127 words)