Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Model Reduction Algorithm Using Nyquist Curve in Frequency Domain

주파수 영역에서 Nyquist 선도를 이용한 모델 축소

  • 조준호 (원광대학교 제어계측공학과) ;
  • 김정철 (원광대학교 제어계측공학과) ;
  • 김진권 (원광대학교 제어계측공학과) ;
  • 최정내 (원광대학교 제어계측공학과) ;
  • 황형수 (원광대학교 제어계측공학과)
  • Published : 2002.06.01
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Abstract

In this paper, a new model reduction method is proposed to obtain a reduced order model in the frequency domain. The method is developed based on the second-order plus dead time modeling technique. The initial value of the reduced model parameters can be obtained using this method coinciding four point(0, -$\pi$/2, -$\pi$, -3$\pi$/2) on the Nyquist curve. The optimal parameters of the reduced model is obtained through calculation procedure with three steps. It is shown that Nyquist curves and unit step responses of the reduced models of numerical examples closely agree with those of original models.

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References

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