Zhejiang University and Alibaba DAMO unveil VLA-Corrector, a 40M-parameter module for real-time robot action correction
jiqizhixin · x · 2026-09-14
Zhejiang University and Alibaba DAMO Academy present VLA-Corrector, addressing the open-loop blind zone in VLA models where robots commit to action chunks without checking for errors between inferences.
- Adds a lightweight 40M-parameter module that monitors execution state in real time
- Detects trajectory deviation and triggers early correction without forcing the large model to recompute each step
- Makes the action horizon adaptive: longer when stable, shorter when correction is needed
- Horizon sweeps show a clear tradeoff: for π0.5, lengthening the horizon cuts policy calls by 4x
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