サンプリングベース外乱オブザーバによるSim-to-Realギャップの克服:解析モデルから学習型世界モデルまで
Tackling Sim-to-Real Mismatch Through Sampling-Based Disturbance Observers: From Analytical Models to Learned World Models
シミュレータや学習済み世界モデルにも適用できるサンプリングベース外乱オブザーバ(SDOB)を提案し、状態ロールアウトやコストクエリを通じてsim-to-realのずれを補償して制御性能を向上させた。
詳しい要約
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著者: Tianqi Zhu, Jun Yang, Jianliang Mao, Cong Li, Shihua Li
分類: cs.RO, eess.SY
原文アブストラクト
Robotic controllers increasingly rely on analytical models, simulators, cost-query interfaces, and learned world models. However, physical deployment can deviate from nominal assumptions, and additional disturbances may arise even when the model itself is accurate. In control systems, disturbance observers (DOB) are widely used to estimate such unmeasured effects from nominal models and measured feedback. Classical DOB formulations are generally built around explicit plant models. This paper develops the sampling-based disturbance observer (SDOB), extending the DOB principle to a broader range of models, including simulators and learned world models, through state-rollout or cost-query interfaces. SDOB separates two observable channels: state-effect disturbances, for which the feedback state differs from its prediction, and cost disturbances, for which the same query state receives different costs as the perceived environment changes. Diverse simulation and real-robot experiments across traditional and learned models demonstrate the effectiveness of SDOB in compensating for sim-to-real mismatch and improving control performance.
