RoboPrompt:スパースな人間入力による直感的ロボット方策ステアリング
RoboPrompt: Intuitive Robot Policy Steering with Sparse Human Input
描いた軌跡や目標点などの簡潔な人間入力から行動の下書きを作り、ベース方策の拡散・フローマッチング過程で洗練させることで、方策を再学習せずに操舵可能にする汎用システム。
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著者: Yanwen Zou, Chenyang Shi, Guoxuan Xu, Wenye Yu, Wendi Chen, Ye Pan, Cewu Lu, Chuan Wen
分類: cs.RO
原文アブストラクト
End-to-end robot policies trained through imitation learning remain constrained by limited data diversity, making reliable zero-shot deployment in real-world settings challenging. Shared-autonomy methods enable human correction through teleoperation, but specialized hardware and operator training hinder deployment at scale. Other approaches incorporate human guidance as additional policy inputs, often requiring architectural changes and dedicated training for steerability, which limits their applicability across policies. We present RoboPrompt, a general-purpose, lightweight robot policy steering system that enables users to guide policy behavior through intuitive, sparse inputs, including drawn traces, target points, and coarse directional instructions. RoboPrompt decouples human-intention translation from the underlying policy: a reusable module converts human guidance into action drafts, which are refined through the diffusion or flow-matching dynamics of the base policy. By controlling action generation in noise space, RoboPrompt balances human intent with the policy prior without modifying the base policy architecture or fine-tuning it for steerability. Experiments demonstrate effective steering across Diffusion Policy, $π_{0.5}$, and FastWAM. We further use steered rollouts for online policy improvement through DAgger. After 2-3 rounds of iteration, average success rates increase by 15.5\% for $π_{0.5}$ across three tasks and by 21.3\% across three policies(Diffusion Policy, $π_{0.5}$, FastWAM) on the Insert Bread task, while average human intervention counts decrease by 44.0\% (2.86 to 1.60) and 81.9\% (2.60 to 0.47), respectively.