Improving Tracking Performance on Disturbance-Rejection Controllers

Potential of the Optimum Modulus Method

“…OMM achieves feasibility of the requirement (3) such that the transferred spectrum is limited within the interval and equality is assumed only in the steady state, that means (4) If we want to design an appropriate 2DoF control system based on (2), we have to modify using onto the . In [1], (3) and (4) are used not only to achieve the perfect results for the control signal but also to reject disturbance. In [3] and [4], OMM is applied to plants with time delays or astatism.…”

“…In [3] and [4], OMM is applied to plants with time delays or astatism. In [1] the importance of the is not mentioned. Next, we will compare the solution using a (1) and using modification of the OMM.…”

“…Simplifying (1) we obtain realizable (2) which can be used for controller design. With the condition (4) as in [1] they assume that structure of the controller is given. On the other side, (1) is a simplified solution.…”

“…in [1], can be briefly defined as follows: There is a predefined structure of the controller (control system). In this particular case it is the PI-controller.…”

“…Based on this analysis the general controller design formula for the system in Fig. 1 is (1) where is stabilizing feedback and is transfer function of the controller corresponding to the modified plant. Using a controller (1) we can write for the controlled value (2) where the is the control transfer function and is required modified behavior of the plant .…”