HAF-VLA: ヒューマノイドの視覚-言語-行動制御のための階層的行動フローフレームワーク
HAF-VLA: Hierarchical Action Flow Framework for Humanoid Vision-Language-Action Control
事前学習済みフローマッチングVLAを階層的に適応させ、移動・頭・腰・全身操作を段階的に生成することでヒューマノイドの全身移動操作を実現した研究。
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著者: Langzhe Gu, Chengkai Hou, Meng Li, Xinhua Wang, Xinyuan Lv, Shuanghao Bai, Guangrun Li, Jingyang He, Ziluo Ding, Zhiyuan Xu, Ning Ding, Kuan Cheng, Jian Tang, Shanghang Zhang, Zhengping Che
分類: cs.RO
原文アブストラクト
Humanoid robots hold great promise as general-purpose agents in human-centered environments, yet adapting generalist vision-language-action (VLA) policies to real-world humanoid loco-manipulation remains challenging. Unlike fixed-base or wheeled manipulators, humanoids must coordinate locomotion, posture, gaze, and dual-arm manipulation over a high-dimensional whole-body action space, where inaccurate base or waist motions can easily induce unstable and aggressive upper-body compensation. We propose HAF-VLA, a hierarchical action-flow framework for humanoid VLA control. Built upon a pretrained flow-matching VLA, HAF-VLA inherits the vision-language prefix encoder and action expert weights, and adapts them to humanoid whole-body loco-manipulation with learnable stage embeddings and cross-stage KV-cache conditioning. Instead of generating the full action chunk in a single pass, HAF-VLA progressively denoises a shared whole-body action space: first locomotion and head commands, then waist refinement, and finally full-body manipulation. To preserve structural dependencies across stages, we introduce a cross-stage KV cache conditioning mechanism, enabling subsequent action generation stages to refine and augment their outputs based on the action representations from preceding stages. Experimental results across six real-world tasks demonstrate that our framework significantly enhances the performance of existing models in humanoid loco-manipulation tasks, demonstrating an effective pathway for adapting strong mobile-manipulation VLAs to humanoid whole-body loco-manipulation.
