StableIDM: 時空間リファインメントによるマニピュレータ切断下での逆動力学モデルの安定化
StableIDM: Stabilizing Inverse Dynamics Model against Manipulator Truncation via Spatio-Temporal Refinement
ロボットの視覚観測から動作指令を予測する逆動力学モデル(IDM)が、マニピュレータが画像から切れて見える状況で性能劣化する問題に対し、空間的特徴集約と時間的平滑化を組み合わせたフレームワークを提案し、精度と実ロボット成功率を向上させた。
詳しい要約
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著者: Kerui Li, Zhe Jing, Xiaofeng Wang, Zheng Zhu, Yukun Zhou, Guan Huang, Dongze Li, Qingkai Yang, Huaibo Huang
分類: cs.RO
原文アブストラクト
Inverse Dynamics Models (IDMs) map visual observations to low-level action commands, serving as central components for data labeling and policy execution in embodied AI. However, their performance degrades severely under manipulator truncation, a common failure mode that makes state recovery ill-posed and leads to unstable control. We present StableIDM, a spatio-temporal framework that refines features from visual inputs to stabilize action predictions under such partial observability. StableIDM integrates three complementary components: (1) auxiliary robot-centric masking to suppress background clutter, (2) Directional Feature Aggregation (DFA) for geometry-aware spatial reasoning, which extracts anisotropic features along directions inferred from the visible arm and (3) Temporal Dynamics Refinement (TDR) to smooth and correct predictions via motion continuity. Extensive evaluations validate our approach: StableIDM improves strict action accuracy by 12.1% under severe truncation on the AgiBot benchmark, and increases average task success by 9.7% in real-robot replay. Moreover, it boosts end-to-end grasp success by 11.5% when decoding video-generated plans, and improves downstream VLA real-robot success by 17.6% when functioning as an automatic annotator. These results demonstrate that StableIDM provides a robust and scalable backbone for both policy execution and data generation in embodied artificial intelligence.
