Robotic Assistant: Completing Collaborative Tasks with Dexterous Vision-Language-Action Models
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| Format: | Preprint |
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2025
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| author | An, Boshi Yang, Chenyu Katzschmann, Robert |
| author_facet | An, Boshi Yang, Chenyu Katzschmann, Robert |
| contents | We adapt a pre-trained Vision-Language-Action (VLA) model (Open-VLA) for dexterous human-robot collaboration with minimal language prompting. Our approach adds (i) FiLM conditioning to visual backbones for task-aware perception, (ii) an auxiliary intent head that predicts collaborator hand pose and target cues, and (iii) action-space post-processing that predicts compact deltas (position/rotation) and PCA-reduced finger joints before mapping to full commands. Using a multi-view, teleoperated Franka and Mimic-hand dataset augmented with MediaPipe hand poses, we demonstrate that delta actions are well-behaved and that four principal components explain ~96% of hand-joint variance. Ablations identify action post-processing as the primary performance driver; auxiliary intent helps, FiLM is mixed, and a directional motion loss is detrimental. A real-time stack (~0.3 s latency on one RTX 4090) composes "pick-up" and "pass" into a long-horizon behavior. We surface "trainer overfitting" to specific demonstrators as the key limitation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_25713 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Robotic Assistant: Completing Collaborative Tasks with Dexterous Vision-Language-Action Models An, Boshi Yang, Chenyu Katzschmann, Robert Robotics We adapt a pre-trained Vision-Language-Action (VLA) model (Open-VLA) for dexterous human-robot collaboration with minimal language prompting. Our approach adds (i) FiLM conditioning to visual backbones for task-aware perception, (ii) an auxiliary intent head that predicts collaborator hand pose and target cues, and (iii) action-space post-processing that predicts compact deltas (position/rotation) and PCA-reduced finger joints before mapping to full commands. Using a multi-view, teleoperated Franka and Mimic-hand dataset augmented with MediaPipe hand poses, we demonstrate that delta actions are well-behaved and that four principal components explain ~96% of hand-joint variance. Ablations identify action post-processing as the primary performance driver; auxiliary intent helps, FiLM is mixed, and a directional motion loss is detrimental. A real-time stack (~0.3 s latency on one RTX 4090) composes "pick-up" and "pass" into a long-horizon behavior. We surface "trainer overfitting" to specific demonstrators as the key limitation. |
| title | Robotic Assistant: Completing Collaborative Tasks with Dexterous Vision-Language-Action Models |
| topic | Robotics |
| url | https://arxiv.org/abs/2510.25713 |