経路条件付き強化学習による長距離ナビゲーションのための局所計画
Path-conditioned Reinforcement Learning-based Local Planning for Long-Range Navigation
参照経路を文脈として与えられた強化学習ベースの局所ナビゲーション方策を提案し、経路が高品質なときは効率を大幅に改善し、劣化・欠如時もベースライン性能を維持することを示した。
詳しい要約
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著者: Mateo Haro, Julia Richter, Fan Yang, Cesar Cadena, Marco Hutter
分類: cs.RO
原文アブストラクト
Long-range navigation is commonly addressed through hierarchical pipelines in which a global planner generates a path, decomposed into waypoints, and followed sequentially by a local planner. These systems are sensitive to global path quality, as inaccurate remote sensing data can result in locally infeasible waypoints, which degrade local execution. At the same time, the limited global context available to the local planner hinders long-range efficiency. To address this issue, we propose a reinforcement learning-based local navigation policy that leverages path information as contextual guidance. The policy is conditioned on reference path observations and trained with a reward function mainly based on goal-reaching objectives, without any explicit path-following reward. Through this implicit conditioning, the policy learns to opportunistically exploit path information while remaining robust to misleading or degraded guidance. Experimental results show that the proposed approach significantly improves navigation efficiency when high-quality paths are available and maintains baseline-level performance when path observations are severely degraded or even non-existent. These properties make the method particularly well-suited for long-range navigation scenarios in which high-level plans are approximate and local execution must remain adaptive to uncertainty.
