SLIM-0.5B: ロボット操作のための行動基盤予測潜在表現の学習
SLIM-0.5B: Learning Action-Grounded Predictive Latents for Robot Manipulation
小型の0.5Bパラメータの潜在相互作用ポリシーを提案し、行動に基づく予測潜在表現を自己教師ありで学習することで、大規模VLAモデルと同等以上の性能を少ないパラメータで達成した。
詳しい要約
1. どんなもの?
2. 先行研究と比べてどこがすごい?
3. 技術・手法の肝は?
4. どうやって有効だと検証した?
5. 議論はある?
6. 次に読むべき論文は?
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著者: Jingkai Wang, Zihan Tang, Gu Zhang, Mingyu Cao, Jiapeng Chen, Jingjiao Zhao, Xiansheng Chen, Pengwei Wang, Lemao Liu, Dejing Dou
分類: cs.RO
原文アブストラクト
Vision-language-action policies rely on large multimodal backbones to jointly perform perception, language conditioning, and action generation at every control step. Much of this capacity supports open-domain semantics, whereas continuous robot manipulation primarily requires compact representations of observations, actions, and the transitions induced by actions. Pixel-level world models provide another route, but predicting visual details irrelevant to control can be unnecessarily expensive. We propose SLIM (Self-supervised Latent Interaction Model), a compact 0.5B-parameter latent interaction policy. SLIM learns action-grounded predictive latents that capture both action-conditioned future transitions and the actions that explain observed changes. SLIM learns these representations through self-supervised masked trajectory prediction, combining action reconstruction with future-latent prediction. A compact Mixture-of-Transformers (MoT) backbone models interactions between observation latents and action tokens. The resulting policy is trained with flow matching for language-conditioned action generation. Across simulation benchmarks and real-world evaluation, SLIM matches or exceeds representative large-scale VLA and world-action-model baselines with fewer parameters, no additional embodied pretraining, lower inference latency, and substantially lower GPU memory usage.