arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2604.27792cs.RO

MotuBrain: 一种先进的世界动作模型用于机器人控制

Motubrain: An Advanced World Action Model for Robot Control

MotuBrain Team(MotuBrain团队)
Motubrain Team, Chendong Xiang, Fan Bao, Haitian Liu, Hengkai Tan, Hongzhe Bi, James Li, Jiabao Liu, Jingrui Pang, Kiro Jing, Louis Liu, Mengchen Cai, Rongxu Cu… 展开作者

Motubrain Team, Chendong Xiang, Fan Bao, Haitian Liu, Hengkai Tan, Hongzhe Bi, James Li, Jiabao Liu, Jingrui Pang, Kiro Jing, Louis Liu, Mengchen Cai, Rongxu Cui, Ruowen Zhao, Runqing Wang, Shuhe Huang, Yao Feng, Yinze Rong, Zeyuan Wang, Jun Zhu

AI总结:

MotuBrain提出一种统一的世界动作模型,结合视频和动作,支持多项任务,实现高效部署和高精度控制。

摘要:

Vision-Language-Action (VLA) 模型在语义上泛化良好,但通常缺乏对世界动态的精细建模。我们提出了MotuBrain,一种统一的世界动作模型,采用UniDiffuser框架和三流Transformer混合架构,联合建模视频和动作。单个模型支持策略学习、世界建模、视频生成、逆动态和联合视频-动作预测,并能扩展到异构多模态数据。基于Motus,MotuBrain引入了统一多视角建模、独立文本流以增强语言-动作耦合、共享跨身体动作表示以及高效的训练和部署方法。我们的推理栈结合了步骤减少、编译、FP8量化、DiT缓存、V2A式动作-only推理和实时分块闭环执行,实现了比基线模型快50倍的速度提升。实验表明,MotuBrain在RoboTwin 2.0上达到95.8%和96.1%的成功率,实现了WorldArena比较中的最强EWMScore,并能仅通过50-100条轨迹适应新的人形躯体。这些结果表明,统一的世界动作模型在通用性、预测准确性和现实部署性方面具有可扩展性。

英文摘要:

Vision-Language-Action (VLA) models generalize semantically well but often lack fine-grained modeling of world dynamics. We present Motubrain, a unified World Action Model that jointly models video and action under a UniDiffuser formulation with a three-stream Mixture-of-Transformers architecture. A single model supports policy learning, world modeling, video generation, inverse dynamics, and joint video-action prediction, while scaling to heterogeneous multimodal data such as video-only, task-agnostic, and cross-embodiment robot data. Building on Motus, Motubrain further introduces unified multiview modeling, an independent text stream for stronger language-action coupling, a shared cross-embodiment action representation, and an efficient post-training and deployment recipe for long-horizon real-world control. Our inference stack combines step reduction, compilation, FP8 quantization, DiT caching, V2A-style action-only inference, and real-time chunked closed-loop execution, achieving over 50x speedup over a naive baseline and up to 11 Hz inference. Experimentally, Motubrain achieves 95.8% and 96.1% average success on RoboTwin 2.0 under clean and randomized settings, respectively, attains the strongest reported EWMScore in our WorldArena comparison, and adapts to new humanoid embodiments with only 50--100 trajectories. These results show that unified world action models can scale in generality, predictive accuracy, and real-world deployability.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑