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arXiv 2603.09415cs.ROcs.AI
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从流到一步:通过隐式最大似然估计基于的分布蒸馏实现实时多模轨迹策略

From Flow to One Step: Real-Time Multi-Modal Trajectory Policies via Implicit Maximum Likelihood Estimation-based Distribution Distillation

TAMS (Technical Aspects of Multimodal Systems), Department of Informatics, University of Hamburg(汉堡大学信息学院TAMS(多模态系统技术方面));Technical University of Munich(慕尼黑技术大学);Agile Robots SE(敏捷机器人公司)

Ju Dong, Liding Zhang, Lei Zhang, Yu Fu, Kaixin Bai, Zoltan-Csaba Marton, Zhenshan Bing, Zhaopeng Chen, Alois Christian Knoll, Jianwei Zhang

AI总结:

通过隐式最大似然估计基于的分布蒸馏,实现实时多模轨迹策略,提升机器人操作的高频闭环控制与鲁棒性。

摘要:

基于扩散和流匹配的生成策略通过建模多模人类示范在机器人操作中实现了强大的性能。然而,其对迭代常微分方程(ODE)积分的依赖引入了显著的延迟,限制了高频闭环控制。最近的单步加速方法减轻了这一开销,但往往表现出分布崩溃,产生平均轨迹,无法执行连贯的操作策略。我们提出了一种框架,通过隐式最大似然估计(IMLE)将条件流匹配(CFM)专家蒸馏为一个快速的单步学生。双向切比雪夫距离提供了一个集级目标,促进模式覆盖和保真度,使教师多模动作分布在单次前向传递中得以保留。统一的感知编码器进一步将多视角RGB、深度、点云和本体感觉整合为几何感知的表示。所得到的高频控制支持实时滚动规划和动态扰动下的改进鲁棒性。

英文摘要:

Generative policies based on diffusion and flow matching achieve strong performance in robotic manipulation by modeling multi-modal human demonstrations. However, their reliance on iterative Ordinary Differential Equation (ODE) integration introduces substantial latency, limiting high-frequency closed-loop control. Recent single-step acceleration methods alleviate this overhead but often exhibit distributional collapse, producing averaged trajectories that fail to execute coherent manipulation strategies. We propose a framework that distills a Conditional Flow Matching (CFM) expert into a fast single-step student via Implicit Maximum Likelihood Estimation (IMLE). A bi-directional Chamfer distance provides a set-level objective that promotes both mode coverage and fidelity, enabling preservation of the teacher multi-modal action distribution in a single forward pass. A unified perception encoder further integrates multi-view RGB, depth, point clouds, and proprioception into a geometry-aware representation. The resulting high-frequency control supports real-time receding-horizon re-planning and improved robustness under dynamic disturbances.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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