Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Model Identification and Design of Optimized IMC-Cascade Controller

모델 동정과 최적의 IMC-Cascade 제어기 설계

  • Cho, Joon-Ho (Division of Electronics and Control Engineering, Wonkwang University) ;
  • Cho, Hyun-Seob (Department of Electronic Engineering, Chungwoon University) ;
  • Hwang, Hyung-Soo (Division of Electronics and Control Engineering, Wonkwang University)
  • 조준호 (원광대학교 전자및제어공학부) ;
  • 조현섭 (청운대학교 전자공학과) ;
  • 황형수 (원광대학교 전자및제어공학부)
  • Received : 2012.11.20
  • Accepted : 2012.12.06
  • Published : 2012.12.31
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Abstract

In this paper, we proposed to model identification in frequency domain using relay feedback and Design of internal model controller(IMC) with Cascade controller. The parameters of controller in the inner loop are determined to minimize the integral of time multiplied by the absolute value of error (ITAE) value of performance Index. The controller of outer loop and parameters of IMC-PID controller can be obtain using identified model. The model identification is considered that it is the transient response and the steady-state response through the use of nyquist curve. Simulation examples are given to show the better performance of the proposed method than conventional methods.

본 논문은 릴레이 피드백을 이용한 주파수 영역에서 내부 및 외부 모델을 동정하고 이 모델을 바탕으로 IMC-Cascade 제어기 파라미터 자동 동조 알고리즘을 제안하였다. 모델 동종 방법은 정상상태와 과도상태를 고려하여 1차의 지연모델로 동정 하였으며, 내부 제어기 및 외부 제어기의 제어 파라미터는 동정된 모델을 활용하여 성능지수 ITAE값이 최소로 되도록 자동동조 하였다. 시뮬레이션 결과 제안된 방법이 기존의 방법보다 우수함을 확인할 수 있었다.

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References

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