Abstract：Grasp planning is one of the key issues for dexterous robotic hands to accomplish desired tasks.A promising approach is to teach the robot hands by human operator.Due to the technical limitation of human machine interface,the grasp configuration learning from the human hand needs to be improved.This paper presents a method to optimize the grasp from the initial configuration provided by the human hand.A quality measure based on joint motion isotropy is defined to evaluate grasp configurations.Human grasp experience is used to provide a desired initial configuration.The position and orientation of the palm is optimized based on the quality measure.The process of optimization is simulated in a virtual environment and the resulting optimal grasps illustrate the validity of the method.
[1] Jau.Dextrous telemanipulation with four fingered hand system[A].In:Proc.of ICRA[C].1996.338-343. [2] Fischer M,et al.Learning techniques in a dataglove based telemanipulation system for the DLR hand[A].In:Proc.of ICRA[C].1998.1603-1608. [3] Kang S B,Ikeuchi K.Toward automatic robot instruction from perception-mapping human grasps to manipulator grasps[J].IEEE Trans.on Robotics and Automation,1997,13(1):81-95. [4] Haruhisa Kawasaki,et al.Virtual teaching based on hand manipulability for multi-fingered robots[A].In:Proc.of ICRA[C].2001.1388-1393. [5] Ammon K,Wright,et al.Kinematic mapping between the EXOS handmaster exoskeleton and the UTAH/MIT dextrous hand[A].In:Proc.of Systems Engineering[C].1990.101-104. [6] Robert N,Rohling and John M.Hollerbach,Optimized fingertip mapping for teleoperation of dextrous robot hands[A].In:Proc.of ICRA[C].1993.769-775. [7] Weston B,Griffin,et al.Calibration and mapping of a human hand for dexterous telemanipulation[A].In:Proc.of ASME IMECE DSC-Symposium on Haptic Interfaces[C].2000.1-8. [8] Jiting Li,Yuru Zhang,Qixian Zhang.Grasp identification of human hands and grasp planning of dexterous hands[A].Chinese J.of Robotics[C].2002.11 [9] Salisbury J K,Craig J J.Articulated hands,force control and kinematic issues[J].Int.J.Robot.1982,1(1). [10] Yoshikawa T.Manipulability of robotic mechanisms[J].Int.J.Robot.Res.1985,4(2):3-9. [11] Bicchi A,Melchiorri C,Balluchi D.On the mobility and manipulability of general multiple limb robots[J].IEEE Trans.Robotics and Automation,1995,11(2):215-228.
