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

  • 제21권10호
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  • Pages.1879-1885
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  • 2017
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  • 2234-4772(pISSN)
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  • 2288-4165(eISSN)
한국정보통신학회 (The Korea Institute of Information and Commucation Engineering)
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무인자동차 궤적 추적 제어 시스템에 관한 연구

Trajectory tracking control system of unmanned ground vehicle

  • Han, Ya-Jun (Department of Electronic Engineering, Gyeongnam National University of Science and Technology) ;
  • Kang, Chin-Chul (Department of Electricity, University Of Gyeongnam Namhae) ;
  • Kim, Gwan-Hyung (Department of Computer Engineering, Tongmyong University) ;
  • Tac, Han-Ho (Department of Electronic Engineering, Gyeongnam National University of Science and Technology)
  • 투고 : 2017.09.05
  • 심사 : 2017.09.18
  • 발행 : 2017.10.31
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초록

본 논문에서는 시간에 따라 방향 속도와 위치가 변하는 무인자동차의 궤적 추적 제어시스템에 대해 논한다. 무인자동차는 운전자의 도움이 없어도 스스로 주위환경을 인식하여 지정된 도로를 주행할 수 있는 자동차로 올바른 주행을 위해 고려해야 할 변수가 다양하다. 무인자동차의 궤적 추적 시스템에서 인식한 정보는 이산적인 값을 가지므로 센스 간의 간격으로 인하여 비연속성 및 비선형성을 가지고 있다. 이로 인하여 목표 궤적을 정확하게 추적하는 것 어렵다. 본 논문은 차량의 운동학 모델링을 통하여 선형오차, 제약 조건, 제어 목표함수의 세 가지 조건을 갖는 무인자동차 궤적 추적시스템을 제안한다. 제안된 궤적 추적시스템을 기반으로 동적 시뮬레이션 소프트웨어-카심(Dynamic Simulation Software-CarSim)의 결합시뮬레이션을 통해 시스템의 성능을 평가하였고, 그 결과로 더욱 정밀하게 목표 궤적을 추적할 수 있음을 확인하였다.

This paper discusses the trajectory tracking system of unmanned ground vehicles based on predictive control. Because the unmanned ground vehicles can not satisfactorily complete the path tracking task, highly efficient and stable trajectory control system is necessary for unmanned ground vehicle to be realized intelligent and practical. According to the characteristics of unmanned vehicle, this paper built the kinematics tracking models firstly. Then studied algorithm solution with the tools of the optimal stability analysis method and proposed a tracking control method based on the model predictive control. The controller used a kinematics-based prediction model to calculate the predictive error. This controller helps the unmanned vehicle drive along the target trajectory quickly and accurately. The designed control strategy has the true robustness, simplicity as well as generality for kinematics model of the unmanned vehicle. Furthermore, the computer Simulink/Carsim results verified the validity of the proposed control method.

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