Design of PID Controller to Ensure Specified Phase margin and Iso-damping property Using Reduction Model

축소 모델을 이용한 위상여유와 등 제동 특성을 만족하는 PID 제어기 설계

In this paper, a new method is proposed for robust proportional- integral - derivative (PID) control that is to ensure specified phase margin and iso - damping property using reduction model. This method is based on the second order plus dead time(SOPDT) reduction model of the high order model. Reduction model used to ensure iso-damping property in the feature frequency. Simulation results gives proof of effectiveness of proposed method.