HALO-WA: ハイブリッド注意機構と潜在変数ガイドによるオンライン強化学習を用いた世界行動モデル
HALO-WA: Hybrid-Attention Latent-Guided Online Reinforcement Learning for World-Action Models
世界行動モデルによる精密操作の失敗を、潜在特徴と行動事前分布を利用した軽量なアクタークリティック適応器とハイブリッド注意機構でオンライン修正する手法を提案し、実機4タスクで成功率を大幅に向上させた。
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著者: Angen Ye, Weijie Ke, Xiaofeng Wang, Xinze Chen, Chaojun Ni, Guosheng Zhao, Boyuan Wang, Zheng Zhu, Junjie Xie, Dapeng Zhang
分類: cs.RO, cs.AI
原文アブストラクト
World-action (WA) models can generate long-horizon action chunks for general-purpose robotic manipulation, but they remain vulnerable to calibration, perception, and contact-dynamics errors in real-world precision tasks, often failing in the final few millimeters of alignment or insertion. We propose HALO-WA, a hybrid-attention latent-guided online reinforcement learning (RL) framework for WA models, which leverages latent features and action priors from the WA generation process through a lightweight actor-critic adapter to enable fast online adaptation to real deployment errors. HALO-WA introduces a hybrid-attention structure that preserves the temporal consistency of action chunks while reading task-relevant information from WA latents conditioned on visual context and end-stage correction requirements, thereby producing refined action chunks. We validate HALO-WA on four real-world precision manipulation tasks, where it improves the average success rate from 26.4\% for WA-base to 87.1\%, outperforming the strongest baseline by 19.2 percentage points while requiring only 45--75 minutes of online training per task. To facilitate reproducibility, we further conduct supplementary simulation experiments in RoboTwin and release the code at https://github.com/YeanRoot/HALO-WA.
