RISS 학술연구정보서비스

검색
다국어 입력

http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.

변환된 중국어를 복사하여 사용하시면 됩니다.

예시)
  • 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
  • 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
닫기
    인기검색어 순위 펼치기

    RISS 인기검색어

      검색결과 좁혀 보기

      선택해제

      오늘 본 자료

      • 오늘 본 자료가 없습니다.
      더보기
      • 무료
      • 기관 내 무료
      • 유료
      • Fuzzy Logic Controller Design for an Agricultural Four-Wheel Independent Mobile Robot

        파블로 ( Pablo Vela Ulloa ),첸티안 ( Chen Tean ),이경환 ( Kyeong-hwan Lee ) 한국농업기계학회 2021 한국농업기계학회 학술발표논문집 Vol.26 No.2

        Due to their improved maneuverability in narrow spaces and increased stability, four-wheel independent mobile robots are becoming popular in several fields, such as agriculture, electrical vehicle, and planetary exploration. However, control algorithms is complicated owing to synchronization issues, mechanical constraints, and actuators equipped. This study presents a navigation controller based on fuzzy logic method for a low velocity autonomous agricultural vehicle built on a 4 wheel independent steering configuration. This paper explores the kinematic model of a 4 wheel independent steering robot and then real time 3D simulations using ROS and Gazebo. In the simulations, virtual GPS and IMU were used as sensors. Uneven terrains or obstacles were not considered for the simulated experiments. The simulation results show the capability of the fuzzy-logic controller in controlling a 4 wheel independent steering robot. In future, the simulated experiments will be compared with field experiments. Futhermore, the field experiments will be conducted in the condition of wheel slippage and low surface friction.

      • Lyapunov Controller for an Agricultural Four-Wheel Independent Mobile Robot

        파블로 ( Pablo Vela Ulloa ),첸티안 ( Chen Tean ),이경환 ( Kyeong-hwan Lee ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.2

        Due to their improved maneuverability in narrow spaces and increased stability, four-wheel independent mobile robots are becoming popular in several fields, such as agriculture, electrical vehicle, and planetary exploration. However, control algorithms are complicated owing to synchronization issues, mechanical constraints, and actuators equipped. This paper explores the kinematic model of a 4 wheel independent steering robot and make use of a Lyapunov controller and A-star planner for navigate a low velocity autonomous agricultural vehicle built on a 4 wheel independent steering configuration. The experiments were conducted in an even surface and the robot was equipped with incremental encoders for the driving motors and absolute encoders for the steering motors as well as a GPS TDR-3000 and a IMU LPMS-IG1 for navigation. Uneven terrains or obstacles were not considered for the experiments. The results show the capability of the controller to navigate the 4 wheel independent steering robot and reach the desired goals. In future, a local planner will be considered for obstacle avoidance and complex field experiments will be conducted in conditions of wheel slippage and low surface friction.

      연관 검색어 추천

      이 검색어로 많이 본 자료

      활용도 높은 자료

      해외이동버튼