 |
HAL-LIRMM - Open Archive |  |
Conference papers
On the Form-Closure Capability of Robotic Underactuated Hand
Abstract : 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.
https://hal-lirmm.ccsd.cnrs.fr/lirmm-00128161
Contributor : Etienne Dombre <>
Submitted on : Wednesday, January 31, 2007 - 8:25:36 AM
Last modification on : Monday, December 17, 2018 - 10:44:01 AM
Contributor : Etienne Dombre <>
Submitted on : Wednesday, January 31, 2007 - 8:25:36 AM
Last modification on : Monday, December 17, 2018 - 10:44:01 AM