Papers › OrbitGrasp: SE(3)-Equivariant Grasp Learning

OrbitGrasp: SE(3)-Equivariant Grasp Learning

3 Jul 2024arXiv:2407.03531links table onlyarchive 2025-07-28

Boce Hu, Xupeng Zhu, Dian Wang, Zihao Dong, Haojie Huang, Chenghao Wang, Robin Walters, Robert Platt

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While grasp detection is an important part of any robotic manipulation pipeline, reliable and accurate grasp detection in SE(3) remains a research challenge. Many robotics applications in unstructured environments such as the home or warehouse would benefit a lot from better grasp performance. This paper proposes a novel framework for detecting SE(3) grasp poses based on point cloud input. Our main contribution is to propose an SE(3)-equivariant model that maps each point in the cloud to a continuous grasp quality function over the 2-sphere S² using spherical harmonic basis functions. Compared with reasoning about a finite set of samples, this formulation improves the accuracy and efficiency of our model when a large number of samples would otherwise be needed. In order to accomplish this, we propose a novel variation on EquiFormerV2 that leverages a UNet-style encoder-decoder architecture to enlarge the number of points the model can handle. Our resulting method, which we name OrbitGrasp, significantly outperforms baselines in both simulation and physical experiments.

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