EAGG让机械臂抓取模型跨不同末端执行器通用,性能接近专用模型。
EAGG: Embodiment-Aligned Grasp Generation via Geometry-Aware Graph Conditioning

- 用图结构和控制空间建模不同机械臂形态,实现统一抓取生成。
- 在6种机械臂上平均成功率56.17%,与专用模型差距小于1.1个百分点。
- 适合需要跨机械臂通用抓取的机器人研发者使用。
跨末端执行器抓取旨在构建一个能泛化于不同物体和多种机械臂形态(从平行夹持器到灵巧手)的统一模型。现有抓取生成器通常针对固定形态设计,或用静态描述符编码形态信息,当拓扑结构、驱动耦合和接触几何差异显著时,迁移能力减弱。本文提出EAGG,通过拓扑感知的末端执行器图和特定于形态的低维控制空间表示每种执行器。一个冻结的末端执行器认知主干将当前关节状态转化为几何感知的特征令牌,作为可复用的形态先验;迭代几何注入在采样过程中持续更新这些令牌,确保条件信息与不断变化的末端执行器几何保持同步。在MultiGripperGrasp基准上,EAGG在六种训练末端执行器上达到56.17%的平均成功率,与专用训练模型差距仅1.10个百分点,同时保留微调和零样本迁移能力。迭代几何注入进一步将合并后的中位接触距离从0.239厘米降至0.189厘米。结果表明,通过在共享生成器内对齐形态结构,而非压制形态差异,可显著增强跨末端执行器抓取的能力。代码已开源:https://github.com/wanhaoniu/EAGG。
原文摘要 · Abstract (English)
Cross-end-effector grasp generation seeks a unified model that generalizes across objects and across embodiments ranging from parallel grippers to dexterous end effectors. Existing grasp generators are typically designed for a fixed embodiment or encode embodiment identity with a static descriptor, which weakens transfer when topology, actuation coupling, and contact geometry differ substantially. We present EAGG, an embodiment-aligned grasp generator that represents each embodiment with a topology-aware end-effector graph and an embodiment-specific low-dimensional end-effector control space. A frozen end-effector-cognition backbone converts the current articulated state into geometry-aware tokens that act as a reusable morphology prior, and iterative geometry injection refreshes these tokens throughout sampling so that conditioning remains synchronized with the evolving end-effector geometry. On the MultiGripperGrasp benchmark, EAGG reaches 56.17% average success across six training end effectors, remaining within 1.10 percentage points of specialized training while preserving transfer to finetuning and zero-shot end effectors. Iterative geometry injection further reduces the pooled median contact distance from 0.239 cm to 0.189 cm. These results show that cross-end-effector grasp generation is strengthened by aligning embodiment structure inside a shared generator rather than suppressing embodiment differences. Code is available at https://github.com/wanhaoniu/EAGG.
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