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Conference Papers Year : 2006

On the Form-Closure Capability of Robotic Underactuated Hand


This paper presents a new method to study the capability of an underactuated hand to produce form-closed grasps. First, the stability behaviours of different underactuated parallel-jaw grippers are analyzed and compared according to their actuation and transmission mechanisms. Then, both notions of 1st order and 2nd order form-closure are revisited for underactuated hands, since in this particular case the assumption of fixed contacts made in the original definition is false. Therefore, constraints imposed by non-backdrivable mechanisms are introduced into the model of the whole grasp. Finally, a simple geometrical condition, necessary and sufficient for 1st order form-closure is proposed. This permits to conclude on the minimum number of non-backdrivable mechanisms required to produce 1st order form-closed grasps using an underactuated hand.


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lirmm-00128161 , version 1 (22-09-2022)



Vincent Begoc, Claude Durand, Sébastien Krut, Etienne Dombre, François Pierrot. On the Form-Closure Capability of Robotic Underactuated Hand. ICARCV 2006 - 9th International Conference on Automation, Robotics and Computer Vision, Dec 2006, Singapour, Singapore. pp.2011-2018, ⟨10.1109/ICARCV.2006.345424⟩. ⟨lirmm-00128161⟩
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