Journal of the Institute of Electronics Engineers of Korea CI (전자공학회논문지CI)

The Institute of Electronics and Information Engineers (대한전자공학회)
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A PD-Fuzzy Controller Design of 2 D.O.F. Wheeled Mobile Robot Using Genetic and Immune Algorithm

유전 및 면역 알고리즘을 이용한 2자유도 구륜 이동 로봇에 대한 PD-Fuzzy 제어기 설계

  • Kim, Sung-Hoe (Dept.of Electronics Engineering, Kyunghee University) ;
  • Kim, Ki-Yeoul (Dept.of Electronics Engineering, Kyunghee University) ;
  • Lim, Ho (Dept.of Electronics Engineering, Kyunghee University) ;
  • Park, Chong-Kug (Dept.of Electronics Engineering, Kyunghee University)
  • 김성회 (경희대학교 전자공학과) ;
  • 김기열 (경희대학교 전자공학과) ;
  • 임호 (경희대학교 전자공학과) ;
  • 박종국 (경희대학교 전자공학과)
  • Published : 2000.09.01
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Abstract

It is not so easy to control the wheeled mobile robot because of some causes like non-holonomic constraints. To overcome these problems, a controller that PD system is combined with fuzzy process is composed of several steps that have each separate algorithm and niche search algorithm and immune algorithm is applied partly. Output term set is changed by search that is performed to get optimal elements and then the rule base is also reformed. The fitness for the altered system is estimated and the surplus elements are removed. After the adjustment of output term set and rule base is finished, input and output membership functions is tuned.

구륜 이동 로봇(Wheeled Mobile Robot)은 제어기 설계에 있어 Nonholonomic Constraints등에 의해 많은 어려움을 지닌다. 본 논문에서는 구륜 이동 로봇의 제어를 위해 PD와 퍼지 시스템이 결합된 제어기가 설계되며, 유전알고리즘에 기초되어 최적 퍼지시스템이 형성된다. 시스템의 최적화 과정은 독립적으로 수행되는 여러 단계들로 이루어지며, 각 단계마다 다른 형식의 알고리즘이 적용되며 효율적 탐색을 위해 Niche알고리즘 및 면역 알고리즘이 결합되어 적용된다. 각 출력용어집합은 최적의 원소들을 얻기 위해 수행되는 탐색에 의해 그 구성이 변화되며, 변화된 출력용어집합의 구성 원소와 관계된 규칙기반이 동시에 조절된다. 출력용어집합의 추가된 원소들 및 조절된 규칙에 대한 적합성이 평가되고 제어 성능의 향상에 기여하지 못한 부분들은 제거된다. 출력변수의 용어집합 및 규칙에 대한 반복적 조절 과정이 완료된 후, 입력 소속함수들에 대한 조정이 제약조건을 가지고 수행되며, 진화연산에 의한 출력소속함수들에 대한 조정이 수행된다.

Keywords

References

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