Bridge-WA: ロボット行動のための世界の変化箇所と変化方法の予測
Bridge-WA: Predicting Where and How the World Changes for Robotic Action
ロボット操作のための軽量な世界行動モデルを提案し、将来の変化を教師モデルから蒸留した3つの事前知識で行動生成を条件付け、外乱に強い汎化を実現した。
詳しい要約
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2. 先行研究と比べてどこがすごい？
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著者: Yongjie Bai, Hanting Wang, Mingtong Dai, Qijun Zhong, Yang Liu, Liang Lin
分類: cs.RO
原文アブストラクト
General-purpose vision-language-action models benefit from large vision-language priors, but effective manipulation also requires anticipating action-relevant scene changes. Existing world-action models often rely on large generative world models or dense future rollouts, which are expensive and spend capacity on visual details weakly coupled to control. We present Bridge-WA, a lightweight world-action framework that distills a frozen future-change teacher into three compact priors: future tokens for intended outcomes, change maps for intervention support, and motion-flow maps for local transition direction. A WorldBridge conditions the action transformer on these priors through multi-source attention memories and spatial-temporal biases, while the teacher model is removed at inference. Across VLABench, RoboTwin2.0, LIBERO-Plus and real-robot evaluations, Bridge-WA improves task success, progress, and robustness, with particularly clear gains under out-of-distribution visual shifts. By focusing action generation on where and how the scene will change, Bridge-WA suppresses nuisance appearance factors such as background, lighting, and distractors, leading to better generalization without deployment-time dense future-image generation. Code and visualizations are available at: https://hcplab-sysu.github.io/BRIDGE-WA .
