Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Geometric Path Tracking for a Fish Robot

물고기 로봇의 기하학적 경로 추종

  • Park, Jin-Hyun (Dept. of Mechatronics Eng., Kyeognam National University of Science and Technology) ;
  • Choi, Young-Kiu (Department of Electrical Engineering, Pusan National University)
  • Received : 2013.11.06
  • Accepted : 2013.12.24
  • Published : 2014.04.30
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Abstract

The study of fish robot is a main subject that are related with the propulsive force comparison using a varying amplitude and frequency for body and tail motion trajectory, and the quick turn using a proper trajectory function. In this study, when a fish robot thrusts forward, feedback control is difficult to apply for a fish robot, because body and tail joints as a sine wave are rolled. Therefore, we detect the virtual position based on the path of the fish robot, define the angle errors using the detected position and the look-ahead point on the given path, and design a controller to track given path. We have found that the proposed method is useful through the computer simulations.

물고기 로봇 연구는 몸체 및 꼬리 관절 궤적의 크기나 주파수의 크기에 따른 로봇의 추력 비교 또는 꼬리 관절 궤적을 적절한 함수로 선정하여 물고기 로봇의 빠른 회전 등과 관련된 연구가 주를 이루고 있다. 본 연구에서는 물고기 로봇이 추력을 받아 앞으로 유영할 경우, 로봇의 몸체 및 꼬리 관절이 사인파와 같이 좌, 우로 요동치며 움직이므로 피드백 제어를 행하기 어렵다. 따라서 물고기 로봇의 경로에 기초한 가상의 위치를 검출하고, 검출된 위치를 사용하여 주어진 경로 위의 예견 점(look-ahead point)을 기준으로 방향 오차를 정의하여 물고기 로봇이 경로를 추종하도록 제어기를 설계하였다. 모의실험 결과 제안된 방법의 유용성을 확인할 수 있었다.

Keywords

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