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Automatic two-fingered grip selection

Grip determination is essential to any task level planning process and to situations in which the pose of the part to be grasped is not known a priori. This paper presents the complete force/moment equations for grasping via a rigid two-fingered gripper. Surface contact is modeled as a linear pressure variation. The quality measure of a grip is taken to be the coefficient of friction needed to keep it from slipping under applied forces and moments, the lower the coefficient of friction, the better the grip. The incorporation of this evaluation into a general grip selection strategy is discussed and several examples given.