The kinematics of contact and grasp
International Journal of Robotics Research
Robot grasp synthesis algorithms: a survey
International Journal of Robotics Research
Control Theory of Nonlinear Mechanical Systems
Control Theory of Nonlinear Mechanical Systems
Robotic Grasping and Fine Manipulation
Robotic Grasping and Fine Manipulation
A Mathematical Introduction to Robotic Manipulation
A Mathematical Introduction to Robotic Manipulation
Control Theory of Multi-fingered Hands: A Modelling and AnalyticalMechanics Approach for Dexterity and Intelligence
Modeling and control of a pair of robot fingers with saddle joint under orderless actuations
ICRA'09 Proceedings of the 2009 IEEE international conference on Robotics and Automation
Dynamic grasping for an arbitrary polyhedral object by a multi-fingered hand-arm system
IROS'09 Proceedings of the 2009 IEEE/RSJ international conference on Intelligent robots and systems
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This paper proposes a stable object grasping method to realize dynamic force/torque equilibrium by using a triple robotic fingers system with soft and deformable hemispherical fingertips. In the authors' previous works, "Blind Grasping" control scheme, which realizes stable object grasping without use of any external sensing such as vision, force, or tactile sensing in the case of using a pair of robot fingers, has been proposed. This control methodology is based on a unique configuration of human hand, called "Fingers-Thumb Opposability". In this paper, a ternary finger in addition to a pair of fingers is introduced not only to expand a stable region of grasping, but also to enhance dexterity and versatility of the multi-fingered robotic hand system. To this end, a "Blind Grasping" manner is modified in order to install it in the triple fingers system. First, dynamics of the triple robotic fingers system and a grasped object with considering rolling constraints is modeled, and a control input based on the blind grasping manner is designed. Next, the closed-loop dynamics is derived and a stability analysis is shown briefly. Finally, its usefulness is discussed through numerical simulation results.