Hydra-0: 汎用世界モデリングと制御のためのアクションフロー
Hydra-0: Action Flow for Generalist World Modeling and Control
ロボットの動作をピクセル運動として表現するアクションフローを用いた汎用世界モデルを提案し、動作誤差を大幅に低減し、ゼロショット合成やデータ効率的な適応を実現した。
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著者: Hongyu Li, Bowen Wen, Xinghao Zhu, Yixuan Wang, Yilun Du, Yunzhu Li, George Konidaris, Stan Birchfield, Soha Pouya, Chenran Li, Yan Chang
分類: cs.RO
原文アブストラクト
We introduce Hydra-0, a generalist world model conditioned on action flow, which represents robot actions as pixel motion. This shared visual interface enables generalist world modeling and control by learning action consequences across embodiments, tasks, environments, and video-generation backbones. Our best configuration achieves 90.4% lower robot-motion error and 60.2% lower object-motion error than our action-conditioned baseline, while supporting zero-shot composition and data-efficient adaptation. On the RoboLab benchmark, Hydra-0 achieves a Pearson correlation of r=0.96 between replayed and reference success rates. Finally, we uncover an emergent inverse mode of this interface: a world action model that predicts compatible robot motion from desired object flow transferred from a human demonstration. A trained action head maps the resulting latent features to executable actions without requiring task-specific expert robot demonstrations. Together, these results demonstrate the potential of action flow as a shared control interface connecting heterogeneous training data, open-loop policy evaluation, and robot control.