Journal of the Korean Institute of Intelligent Systems (한국지능시스템학회논문지)

Korean Institute of Intelligent Systems (한국지능시스템학회)
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Navigation of an Autonomous Mobile Robot with Vision and IR Sensors Using Fuzzy Rules

비전과 IR 센서를 갖는 이동로봇의 퍼지 규칙을 이용한 자율 주행

  • 허준영 (부경대학교 대학원 전자공학과) ;
  • 강근택 (부경대학교 전자컴퓨터정보통신공학부) ;
  • 이원창 (부경대학교 전자컴퓨터정보통신공학부)
  • Published : 2007.12.25
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Abstract

Algorithms of path planning and obstacle avoidance are essential to autonomous mobile robots that are working in unknown environments in the real time. This paper presents a new navigation algorithm for an autonomous mobile robot with vision and IR sensors using fuzzy rules. Temporary targets are set up by distance variation method and then the algorithms of trajectory planning and obstacle avoidance are designed using fuzzy rules. In this approach, several digital image processing technique is employed to detect edge of obstacles and the distances between the mobile robot and the obstacles are measured. An autonomous mobile robot with single vision and IR sensors is built up for experiments. We also show that the autonomous mobile robot with the proposed algorithm is navigating very well in complex unknown environments.

미지의 환경에서 이동로봇이 자율 주행을 할 수 있기 위해서는 경로 설정 및 장애물 회피가 필수적인 요소이다. 이를 위해 본 논문에서는 비전과 IR 센서로부터 획득한 데이터와 퍼지규칙을 이용하는 자율 주행 알고리즘을 구현하고자 한다. 로봇과 장애물과의 거리가 멀리 떨어져 있는 경우는 비전에서 얻은 2차원 이미지를 메디안 필터링, 에지 추출, 모폴로지, 세선화 과정을 거쳐 임시 목표물을 설정한 다음, 거리 변화율 기법과 퍼지 규칙을 이용하여 경로 설정을 한다. 로봇과 장애물과의 거리가 근접할 경우는 IR 센서를 이용하여 경로 설정 및 근접 장애물 회피를 하도록 한다. 그리고 본 논문에서는 제안된 퍼지규칙을 이용한 데이터 융합 알고리즘이 이동로봇을 미지의 환경에서 보다 효율적으로 주행하게 할 수 있음을 실제 실험을 통해 보여주고자 한다.

Keywords

References

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