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cs.RO2026
Does a Learned Corrector Beat a Simple Retreat? Evidence from a Frozen VLA
Chenchao Sheng, Zhuang Jiang, Liuhaichen Yang +2
Before deploying runtime recovery for a frozen vision-language-action (VLA) policy, one must establish that an intervention improves success beyond ordinary run-to-run variation an…
cs.RO2026
Guided Action Flow: Value-Guided Sampling for Frozen Vision-Language-Action Policies
Liuhaichen Yang, Zhuang Jiang, Chenchao Sheng +8
Reinforcement learning can improve vision-language-action (VLA) policies beyond supervised fine-tuning, although this typically involves further updates to the policy parameters. F…