リプレイ不要の生涯模倣学習のための階層的二重ルーティング注意機構
HIDRA: Hierarchical Dual-Routing Attention for Replay-Free Lifelong Imitation Learning
過去データを保存・再訪できない単一パス生涯模倣学習において、専門家選択の劣化を階層的二重注意とキー幾何正則化で抑え、LIBEROでリプレイ有無の既存手法を上回った研究。
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?
4. どうやって有効だと検証した?
5. 議論はある?
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著者: Fanqi Yu, Matteo Tiezzi, Cigdem Beyan, Tommaso Apicella, Vittorio Murino
分類: cs.RO, cs.AI
原文アブストラクト
Robotic agents operating in real-world environments must adapt continuously from a stream of multimodal demonstrations, often under constraints that preclude storing or revisiting past data. In this replay-free, single-pass lifelong imitation learning setting, sequential updates can progressively distort the representation space, making expert-based approaches particularly sensitive to routing interference, causing expert selection to degrade over time. We propose HIDRA, a structured routing framework that mitigates this issue through a hierarchical dual-attention mechanism, which decouples instruction-level expert retrieval from context-dependent refinement. To further stabilize routing under representation drift, HIDRA introduces a key-level geometric regularization that enforces both alignment within tasks and separation across tasks. The resulting approach enables reliable expert selection while supporting an expandable set of experts for continual adaptation. We evaluate HIDRA on several LIBERO benchmark suites, including more challenging variants with heterogeneous task sequences and paraphrased language instructions. Our approach consistently outperforms both replay-free and replay-based baselines, improving AUC and forward transfer while maintaining low forgetting, with stronger gains under high interference and language variation. The code is available at: https://github.com/yfqi/HIDRA.
関連論文
- 多モーダル潜在リプレイと段階的調整による生涯模倣学習生涯学習/模倣学習
- SPREAD: 生涯模倣学習のための部分空間表現蒸留生涯学習/模倣学習