火星探査ロボットのための期待自由エネルギーに基づく情報経路計画
Expected Free Energy-based Informative Path Planning for Robotic Mars Exploration
未知環境を探索するロボットが、情報マップの構築と高価値領域の発見を同時に行うための計画手法を提案。期待自由エネルギーを基準に、経路長制約下で連続軌道を最適化し、情報理論的ベースラインを上回る性能を示した。
詳しい要約
1. どんなもの?
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著者: Ajith Anil Meera, Pablo Lanillos, Wouter Kouw
分類: cs.RO, cs.IT, cs.LG
原文アブストラクト
An autonomous robot efficiently exploring an unknown environment, such as looking for water sources on Mars, faces two simultaneous demands: building an accurate information map while quickly finding the regions of greatest value, and paying for every meter of travel and the cost of every measurement it takes. Classical information-seeking and reward-seeking criteria address only one of these objectives at a time. Here, we propose Expected Free Energy (EFE), the principled action-selection objective from active inference, as a unifying criterion for budgeted robotic informative path planning. Maintaining a Gaussian-process belief over the information field, our agent plans continuous trajectories that minimize expected free energy under hard path-length constraints. The results from multiple realizations show that EFE-based planning yields accurate posterior maps and locates the highest-value regions simultaneously, outperforming information-theoretic baselines under the same settings. In robotic exploration, these unified, easy-to-tune principled information-gathering strategies facilitate autonomous deployment while enforcing efficiency and resource constraints.