arXiv:2602.17110cs.RO2026-02

用生成模型将刚性夹爪抓取策略适配到软体夹爪,提升抓取成功率。

Grasp Synthesis Matching From Rigid To Soft Robot Grippers Using Conditional Flow Matching

  • 基于条件流匹配学习刚性与软体夹爪之间的抓取姿态映射。
  • 对已见和未见物体的抓取成功率分别达46%和34%,显著优于基线。
  • 适用于软体机器人系统,尤其擅长抓取圆柱和球形物体。

刚性夹爪与软体夹爪的抓取合成之间存在表示鸿沟。现有方法如Anygrasp主要针对刚性平行夹爪设计,直接应用于软体夹爪时难以捕捉其柔性特性,导致数据依赖强且模型不准。本文提出一种新框架,将刚性夹爪的抓取姿态映射至软体Fin-ray夹爪。采用条件流匹配(CFM)这一生成模型,结合深度图像中的物体几何信息,通过U-Net自编码器实现从初始Anygrasp姿态到稳定软体夹爪姿态的连续映射。构建了成对的刚-软抓取姿态数据集。在7自由度机器人上验证,使用CFM生成的姿态使软体夹爪对已见和未见物体的抓取成功率分别达到46%和34%,显著高于基线刚性姿态的25%和6%。尤其对圆柱(50%、100%)和球形物体(25%、31%)表现优异,且具备良好泛化能力。该方法为软体机器人提供了一种数据高效、可扩展的抓取策略迁移方案。

原文摘要 · Abstract (English)

A representation gap exists between grasp synthesis for rigid and soft grippers. Anygrasp [1] and many other grasp synthesis methods are designed for rigid parallel grippers, and adapting them to soft grippers often fails to capture their unique compliant behaviors, resulting in data-intensive and inaccurate models. To bridge this gap, this paper proposes a novel framework to map grasp poses from a rigid gripper model to a soft Fin-ray gripper. We utilize Conditional Flow Matching (CFM), a generative model, to learn this complex transformation. Our methodology includes a data collection pipeline to generate paired rigid-soft grasp poses. A U-Net autoencoder conditions the CFM model on the object's geometry from a depth image, allowing it to learn a continuous mapping from an initial Anygrasp pose to a stable Fin-ray gripper pose. We validate our approach on a 7-DOF robot, demonstrating that our CFM-generated poses achieve a higher overall success rate for seen and unseen objects (34% and 46% respectively) compared to the baseline rigid poses (6% and 25% respectively) when executed by the soft gripper. The model shows significant improvements, particularly for cylindrical (50% and 100% success for seen and unseen objects) and spherical objects (25% and 31% success for seen and unseen objects), and successfully generalizes to unseen objects. This work presents CFM as a data-efficient and effective method for transferring grasp strategies, offering a scalable methodology for other soft robotic systems.

抓取合成软体机器人生成模型姿态映射

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