AME-2: アテンション型ニューラルマップ符号化による俊敏で汎用的な脚式移動
AME-2: Agile and Generalized Legged Locomotion via Attention-Based Neural Map Encoding
アテンション機構を用いたマップエンコーダと不確実性を考慮した学習ベースのマッピングを組み合わせ、四足・二足ロボットの俊敏かつ汎用的な脚式移動を実現した強化学習フレームワーク。
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著者: Chong Zhang, Victor Klemm, Fan Yang, Marco Hutter
分類: cs.RO
原文アブストラクト
Achieving agile and generalized legged locomotion across terrains requires tight integration of perception and control, especially under occlusions and sparse footholds. Existing methods have demonstrated agility on parkour courses but often rely on end-to-end sensorimotor models with limited generalization and interpretability. By contrast, methods targeting generalized locomotion typically exhibit limited agility and struggle with visual occlusions. We introduce AME-2, a unified reinforcement learning (RL) framework for agile and generalized locomotion that incorporates a novel attention-based map encoder in the control policy. This encoder extracts local and global mapping features and uses attention mechanisms to focus on salient regions, producing an interpretable and generalized embedding for RL-based control. We further propose a learning-based mapping pipeline that provides fast, uncertainty-aware terrain representations robust to noise and occlusions, serving as policy inputs. It uses neural networks to convert depth observations into local elevations with uncertainties, and fuses them with odometry. The pipeline also integrates with parallel simulation so that we can train controllers with online mapping, aiding sim-to-real transfer. We validate AME-2 with the proposed mapping pipeline on a quadruped and a biped robot, and the resulting controllers demonstrate strong agility and generalization to unseen terrains in simulation and in real-world experiments.
