Kinematics, statics and stiffness effect of 3D grasp by multifingered hand with rolling contact at the fingertip

Abstract

The kinematics, statics and stiffness effect of a 3D grasp by a multifingered hand is investigated considering the rolling contact at the fingertip. By representing the local shape of the fingertip and the object by a quadratic surface and by linearization of the fundamental formulae, the kinematic-static relation for the motion-force of the fingertip, contact location and the object is derived. Additionally, the stiffness effect for object motion that affects the stability of the grasp is analyzed and evaluated for the grasp by a three-fingered hand.