SemSafe-3DGS: 不確実な3Dガウシアンスプラッティングマップにおける意味的リスクを考慮した能動ナビゲーション
SemSafe-3DGS: Semantic Risk-Aware Active Navigation in Uncertain 3D Gaussian Splatting Maps
3Dガウシアンマップに意味属性を付与し、クラスごとのリスク重みで衝突余裕を調整する制御バリア関数と、不確実性を減らす能動知覚を統合した安全ナビゲーション手法を提案。
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著者: Amirhossein Mollaei Khass, Athanasios Cosse, Nader Motee
分類: cs.RO
原文アブストラクト
Autonomous robots operating in partially observed environments must navigate safely while acquiring observations that improve future planning. Existing safety formulations generally reason primarily about geometry. Consequently, geometrically similar scene elements may induce comparable control responses despite having different semantic consequences. We present a semantic risk aware safe-active perception framework for navigation in attributed 3D Gaussian maps. Semantic attributes modulate an Average Value-at-Risk collision clearance model through class dependent risk weights, allowing safety-critical Gaussian primitives to receive greater influence in the composite barrier. The resulting weighted clearances are aggregated into a control barrier function, while a trajectory-relevant active perception barrier promotes observations that reduce geometric map uncertainty along the robot's anticipated motion. Both objectives are integrated in a unified CBF-QP that enforces semantic risk-aware collision avoidance as a hard constraint while relaxing information acquisition when it conflicts with safety or task progress. Experiments demonstrate efficient safety constraint, improved navigation through active perception, semantic dependent trajectory adaptation, and real-robot execution under Ackermann dynamics.