“Short-term ASV Collision Avoidance with Static and Moving Obstacles”
Authors: Bjørn-Olav H. Eriksen and Morten Breivik,Affiliation: NTNU, Department of Engineering Cybernetics
Reference: 2019, Vol 40, No 3, pp. 177-187.
Keywords: Autonomous surface vehicles, collision avoidance, model predictive control
Abstract: This article considers collision avoidance (COLAV) for both static and moving obstacles using the branching-course model predictive control (BC-MPC) algorithm, which is designed for use by autonomous surface vehicles (ASVs). The BC-MPC algorithm originally only considered COLAV of moving obstacles, so in order to make the algorithm also be able to avoid static obstacles, we introduce an extra term in the objective function based on an occupancy grid. In addition, other improvements are made to the algorithm resulting in trajectories with less wobbling. The modified algorithm is verified through full-scale experiments in the Trondheimsfjord in Norway with both virtual static obstacles and a physical moving obstacle. A radar-based tracking system is used to detect and track the moving obstacle, which enables the algorithm to avoid obstacles without depending on vessel-to-vessel communication. The experiments show that the algorithm is able to simultaneously avoid both static and moving obstacles, while providing clear and readily observable maneuvers. The BC-MPC algorithm is compliant with rules 8, 13 and 17 of the the International Regulations for Preventing Collisions at Sea (COLREGs), and favors maneuvers following rules 14 and 15.
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DOI: 10.4173/mic.2019.3.4DOI forward links to this article:
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BibTeX:
@article{MIC-2019-3-4,
title={{Short-term ASV Collision Avoidance with Static and Moving Obstacles}},
author={Eriksen, Bjørn-Olav H. and Breivik, Morten},
journal={Modeling, Identification and Control},
volume={40},
number={3},
pages={177--187},
year={2019},
doi={10.4173/mic.2019.3.4},
publisher={Norwegian Society of Automatic Control}
};