VLA-Fabric:複数アームVLAエージェントのための学習的相互作用による協調
VLA-Fabric: Learning Interaction for Composable Multi-Arm VLA Agents
各アームに独立したVLAモデルを持たせ、ポリシー境界を越えた学習的相互作用で協調動作を実現する手法を提案し、3〜4本アームの実機実験で成功率を16〜40ポイント向上させた。
詳しい要約
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著者: Chenglong Zhang, Shuaijun Liu, Feiyang You, Shuyang Hao, Chengyu Wu, Ningxin Su
分類: cs.RO
原文アブストラクト
Vision-language-action (VLA) models are rapidly expanding what individual robots can accomplish, yet many real-world manipulation settings require multiple arms to operate as a coordinated system. Existing approaches organize multi-arm coordination in different ways, including centralized joint policies, high-level task or role assignment, and locally executed policies that react to teammates. However, how complete action-producing VLAs should explicitly interact with one another during action generation remains largely unexplored. We introduce VLA-Fabric, which organizes one complete VLA per arm while preserving local perception and action ownership, and enables coordination through learned interaction across policy boundaries. We first systematically study where such interaction should occur, how peer information should be aggregated, and how the interaction should be learned, revealing complementary coordination functions spanning shared context, peer-specific latent information, and action-stage interaction. We then re-instantiate these functions in a structurally different VLA architecture, showing that the coordination principle is not tied to a particular tensor layout or backbone implementation. Finally, we compose teams of three and four arms and evaluate them in simulation and physical experiments. On all four physical tasks, Full interaction improves success over independently trained local policies by 16--40 percentage points. Together, these results suggest that explicit interaction among complete VLA policies offers a scalable path toward networked embodied intelligence.