Coefficient diagram method: Difference between revisions

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The most important properties of the method are: the adaptation of the polynomial representation for both the plant and the controller, the use of the two-degree of freedom (2DOF) control system structure, the nonexistence (or very small) of the overshoot in the step response of the closed loop system, the determination of the settling time at
the start and to continue the design accordingly, the good robustness for the control system with respect to the plant parameter changes, the sufficient gain and phase margins for the controller.<ref>Y.C. Kim and S. Manabe , "''Lecture notes on A Polynomial Approach to Control System Design: Coefficient Diagram Method (CDM)''", Seoul, 2001.</ref> The most considerable advantages of CDM can be listed as follows :<ref>S.E. Hamamci, "''A robust polynomial-based control for stable processes with time delay''", Electrical Engineering, vol: 87, pp.163–172, 2005.</ref>:
 
1. The design procedure is easily understandable, systematic and useful. Therefore, the coefficients of the