In control theory, the coefficient diagram method (CDM) is an algebraic approach applied to a polynomial loop in the parameter space.
If the controller is designed without considering these limitations, the robustness property will be very poor, even though the stability and time response requirements are met.
CDM controllers designed while considering all these problems is of the lowest degree, has a convenient bandwidth and results with a unit step time response without an overshoot.
[11] He developed a new method that easily builds a target characteristic polynomial to meet the desired time response.
CDM is an algebraic approach combining classical and modern control theories and uses polynomial representation in the mathematical expression.