FIERCE: 進捗-失敗フィードバックによる汎用ロボット方策から高速専門家への変換
FIERCE: From Generalist Robot Policies to Fast Specialists via Progress-Failure Feedback
汎用ロボット方策を初期値とし、進捗と失敗を評価する統一評価器を用いた強化学習で、シミュレータや手動報酬設計なしに接触の多い実タスク向けの小型専門家方策を効率的に学習する手法を提案。
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?
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5. 議論はある?
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著者: Runjia Tan, Yuang Tu, Yujie Yan, Lan Yu, Xuesong Tian, Chen Lv
分類: cs.RO
原文アブストラクト
Generalist robot policies offer useful initialization, but refining compact specialists through limited physical interaction requires informative learning feedback. We present FIERCE, a generalist-initialized reinforcement learning framework centered on a unified, task-adaptive progress-failure evaluator. Its architecture shares an observation-language representation between an observed-progress head and an action-conditioned latent predictor whose past and current predictions feed a causal sequence head for task-failure estimation. Joint supervision from progress and preference labels, synchronized commands and observations, and terminal outcomes trains the evaluator; target-task rollouts support adaptation and calibration. Fixed evaluator snapshots provide progress shaping and failure-risk penalties alongside independently verified terminal rewards, while evaluator and policy updates alternate as new experience is collected. Refinement requires neither continued generalist action queries nor a dedicated target-task simulator or manually annotated dense rewards. Only the compact specialist is retained at deployment. The evaluation separates feedback quality, policy-learning efficiency, and deployment cost across simulation and two contact-rich real tasks. Code, model weights, and data-restoration tools are released at https://github.com/ar-mine/FIERCE.