Journal of the Korean Institute of Intelligent Systems (한국지능시스템학회논문지)

Korean Institute of Intelligent Systems (한국지능시스템학회)
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A Survey on the Fuzzy Control Systems with Learning/Adaptation Capability

학습/적응력을 갖는 퍼지제어시스템들에 관한 고찰

  • 김용태 (한국과학기술원 전기 및 전자공학과) ;
  • 이연정 (경북대학교 전자전기공학부) ;
  • 이승하 (한국과학기술원 전기 및 전자공학과) ;
  • 정태신 (한국고학기술원 전기 및 전자공학과) ;
  • 변증남 (한국과학기술원 전기 및 전자공학과)
  • Published : 1995.09.01
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Abstract

In this paper the fuzzy extension for the classical engineering mechanics problems is studied. The governing differential equation is derived for the buckling loads of the columns with uncertain mediums: the their own weight and the flexural rigidity. The columns with one typical end constraint(hinged1 clarnped/free) and the other finite rotational spring with fuzzy constant are considered in numerical examples. The vertex method is used to evaluate the fuzzy functions. The Runge-Kutta method and Determinant Search method are used to solve the differential equation and determine the buckling loads, respectively. The membership functions of the buckling load are calculated. The index of fuzziness to quantitatively describe the propagation of fuzziness is defined. According to the fuzziness of governing factors, the varlation of index of fuzziness for buckling load is investigated, and the sensitivity for the end constraints is analyzed.

본 논문에서는 학습/적응능력을 갖는 퍼지제어시스템들이 여러가지 관점에서 고찰되었다. 먼저, 기존에 제안된 다양한 학습/적응 퍼지제어시스템들의 기본적인 구성요소들을 바탕으로하여 이러한 시스템들의 일반적인 구조를 제안하였다. 그리고 제안된 구조의 중요한 구성요소들을 중심으로 고찰기준을 설정하였다. 고찰기준으로는 퍼지제어기나 퍼지모델 등에 사용되는 퍼지추론시스템의 구조, 학습/적응에 사용되는 퍼지추론시스템의 조정계수와 제어성능 평가함수, 그리고 학습/적응알고리즘을 설정하였다. 다음으로, 이러한 고찰기준들을 바탕으로하여 학습/적응 퍼지제어시스템들을 분류하고 각각의 특징들을 고찰하였다. 마지막으로, 사용된 퍼지추론시스템들의 범용 함수근사화 성질에 대하여도 알아 보았다.

Keywords

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