蒸留型視覚言語信頼性ガイド付き拡散モデルによる空中ナビゲーション
Guided Diffusion with Distilled Vision-Language Reliability for Aerial Navigation
UAVの自律ナビゲーション向けに、観測の信頼性を考慮した拡散ベースの経路生成プランナーを提案。視覚言語モデルから蒸留した信頼性ヒートマップで不確実領域を検出し、ESDFコストで物理障害物と同等に扱うことで、衝突率を大幅に低減した。
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著者: Ivan Valuev, Iana Zhura, Valerii Serpiva, Didar Seyidov, Dzmitry Tsetserukou
分類: cs.RO
原文アブストラクト
Autonomous UAV navigation is conventionally solved by pipelines that separate perception, mapping, and planning into distinct stages, which propagates errors, accumulates latency, and requires environment-specific retuning. End-to-end generative models remove these interfaces by mapping raw observations directly to trajectories, but inherit a subtle failure mode: trained on clean data, they cannot recognise when an observation is unreliable, and treat degraded regions such as glass, mirrors, and overexposed surfaces as valid evidence for planning. We present a reliability-aware diffusion planner for 3D UAV navigation. It conditions trajectory generation on the observation together with a scene-level reliability heatmap that marks where perception cannot be trusted, produced by a lightweight network that distils the open-vocabulary reasoning of a vision-language model within the real-time planning budget. To generalise to unseen environments without retraining, we steer the denoising process with a differentiable two-stage ESDF cost that treats physical obstacles from depth and virtual obstacles from highly unreliable regions on equal footing. In simulation and on a real quadrotor, our planner produces markedly safer trajectories than a state-of-the-art diffusion baseline, reducing the obstacle-violation rate from 40.3% to 9.6% and raising the mean reliability of traversed regions from 0.588 to 0.925. Ablating the reliability term alone drops mean reliability from 0.898 to 0.783, confirming it as the decisive component, while distillation runs the framework up to 2 times faster than the full vision-language model.
