The GR2 gripper: an underactuated hand for open-loop in-hand planar manipulation

Rojas, Nicolas, Ma, Raymond R and Dollar, Aaron M (2016) The GR2 gripper: an underactuated hand for open-loop in-hand planar manipulation. IEEE Transactions on Robotics, 32 (3). pp. 763-770. ISSN 1552-3098

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Performing dexterous manipulation of unknown objects with robot grippers without using high-fidelity contact sensors, active/sliding surfaces, or a priori workspace exploration is still an open problem in robot manipulation and a necessity for many robotics applications. In this paper, we present a two-fingered gripper topology that enables an enhanced predefined in-hand manipulation primitive controlled without knowing the size, shape, or other particularities of the grasped object. The in-hand manipulation behavior, namely, the planar manipulation of the grasped body, is predefined thanks to a simple hybrid low-level control scheme and has an increased range of motion due to the introduction of an elastic pivot joint between the two fingers. Experimental results with a prototype clearly show the advantages and benefits of the proposed concept. Given the generality of the topology and in-hand manipulation principle, researchers and designers working on multiple areas of robotics can benefit from the findings.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Depositing User: Nicolas Rojas
Date Deposited: 29 Apr 2016 13:58
Last Modified: 28 Jan 2021 17:27

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