Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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A System Modeling and Controller Design Method Using Discrete Fourier Transform

이산 푸리에변환을 이용한 모델링과 제어기 설계 방법

  • 심관식 (전남대학교 공업기술연구소) ;
  • 안현진 (전남대학교 대학원 전기공학과) ;
  • 남해곤 (전남대 전기공학과) ;
  • 임영철 (전남대학교 전기공학과) ;
  • 김의선 (신경대학교 인터넷정보통신학과)
  • Received : 2011.11.10
  • Accepted : 2012.01.02
  • Published : 2012.02.29
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Abstract

This paper describes system modeling and controller design method in the measured signal by discrete Fourier transform. Transfer function of the second order system is estimated by the dominant parameter which is computed in the magnitude and the phase of Fourier spectrum of the measured signal. In addition, the controller was designed by the estimated transfer function, and the results were compared. The proposed estimation method of transfer function contains only a very simple mathematical process. Therefore, it is effective to design the controller in the measured signal when the output of the system contains the characteristics of complex exponential functions case. The proposed method was applied on Op-Amp system to verify the efficiency and the reliability. The results show that the proposed algorithms are highly applicable to the system modeling and controller design in the measured data.

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References

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