G-DRAGON: 屋外ナビゲーションのための地理空間推論と動的計画を備えた検索拡張フレームワーク
G-DRAGON: Geospatial Reasoning and Dynamic Planning for Retrieval-Augmented Outdoor Navigation
自然言語の指示からOSM地図を検索して大域経路を計画し、SLAMと組み合わせてロボットを目的地まで誘導し、最後の区間はフロンティア探索とセマンティックボクセルマッピングで目標物を探索する屋外ナビゲーション手法を提案した。
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著者: Dongzhihan Wang, Yi Du, Jianan Sun, Yuan Xue, Yingchen Zhang, Bing Xiao, Chen Wang, Liang Xu
分類: cs.RO
原文アブストラクト
Autonomous ground robots operating in large-scale outdoor environments require both robust long-range navigation and fine-grained ''last-mile'' exploration. Current advances in visual-language navigation (VLN) work well at short-range tasks, lacking geospatial grounding for long-distance missions. Some OpenStreetMap (OSM)-based methods relying on cloud-based Large Language Models (LLMs) are prone to factual hallucination and cannot conduct ''last-mile'' exploration based on human instruction. To address these challenges, we present G-DRAGON, a retrieval-augmented framework for outdoor, open-world navigation. This framework maps natural-language commands to versioned, local OSM entities via generative retrieval based on lightweight LLM, yielding accurate coordinates for global route planning. A high-level planning module bridges global topological routes with the SLAM system, projecting geospatial waypoints into the robot's navigable frame. For the ''last mile," the framework transitions to frontier-based exploration and open-set semantic voxel mapping to localize open-vocabulary targets. Experimental results in simulation demonstrate our framework outperforms state-of-the-art baselines. Furthermore, we validate the system in unseen real-world urban environments on an Unmanned Ground Vehicle (UGV), successfully completing person-search missions with trajectories of up to 500m.
