ForceDelta-VLA: 接触の多いマニピュレーションのための力条件付き行動補正の蒸留
ForceDelta-VLA: Distilling Force-Conditioned ActionCorrections for Contact-Rich Manipulation
力覚対応VLAポリシーを、参照行動と力補正に分解して蒸留するフレームワークを提案し、接触の多いタスクで成功率を54.4%から82.2%に向上させた。
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著者: Ju Dong, Yu Fu, Jian Chen, Yimeng Liu, Haocheng Zhao, Lei Zhang, Kaixin Bai, Liding Zhang, Diwen Zheng, Alois Christian Knoll, Angela P. Schoellig, Jianwei Zhang
分類: cs.RO
原文アブストラクト
Force-aware Vision-Language-Action (VLA) policies improve contact-rich manipulation, but typically combine task-level motion and contact-dependent adjustment in a single action prediction. Demonstrations provide no explicit labels for decomposing that prediction into a reusable reference action and a correction. We present ForceDelta-VLA, a correction-distillation framework that constructs an explicit force-correction target using paired predictions from a frozen teacher's force-conditioned and learned force-agnostic modes. A separate delay-correction target accounts for reference-action mismatch and the change in reference state. Training uses asynchronous schedule replay with the cached task context available during execution. The resulting lightweight policy adjusts the reference actions using recent force history and robot state, responding to contact changes between reference-action updates without regenerating complete action chunks. Across nine single-arm and bimanual contact-rich tasks, ForceDelta-VLA achieves an 82.2% mean success rate, compared with 54.4% for the original ForceVLA baseline. Direct execution of our Stage-1 Temporal Teacher achieves 70.6%. Relative to ForceVLA, the complete system reduces mean peak contact force over successful trials by approximately 26% on both platforms.
