Optimal initialization of manipulation dynamics by vorticity model of robot hand preshaping. Part I: Vorticity model

The manipulation phase of a multifingered robot hand is initialized, upon contact, by the impact force patterns imparted to the object at contact points, in the final state of a preshaped hand closure. The object then inherits from contacts different helix motion tendencies (translation, rotation) as the initial conditions of manipulation. These motion tendencies are caused by the forces/torques imparted to the object upon impact, and are generated by changes of momenta of the closing hand preshape at the contact locations. The generalized impact force patterns vary for different hand preshapes, since each preshape closes upon an object with different momenta types. Consequently, the purposive closing of a preshaped hand should be kinematically modeled in such a way that impact force patterns can be naturally deduced from the model and compared to the desired ones so that this preshaped closing can be optimized according to the impact force pattern it applies to the object at contact. This would generate the optimal initial conditions of manipulation. Our work in this two part article focuses on developing methods of determining, optimally, the preshape of a robot hand closing onto an object, in order to achieve at contact a certain stability and manipulability degree based on kinematic considerations. Toward this objective, in Part I of the manuscript we define the stability and manipulability criteria of a robot hand preshape based on vortex theory, dealing with the analysis of vorticities in the robot hand workspace. © 2000 John Wiley & Sons, Inc.

[1]  John F. Canny,et al.  Easily computable optimum grasps in 2-D and 3-D , 1994, Proceedings of the 1994 IEEE International Conference on Robotics and Automation.

[2]  Ronald S. Fearing,et al.  Simplified Grasping and Manipulation with Dextrous Robot Hands , 1984, 1984 American Control Conference.

[3]  Yoshihiko Nakamura,et al.  Advanced robotics - redundancy and optimization , 1990 .

[4]  J. Y. S. Luh,et al.  Constrained Relations between Two Coordinated Industrial Robots for Motion Control , 1987 .

[5]  Nancy S. Pollard,et al.  Synthesizing grasps from generalized prototypes , 1996, Proceedings of IEEE International Conference on Robotics and Automation.

[6]  Mark R. Cutkosky,et al.  Modeling manufacturing grips and correlations with the design of robotic hands , 1986, Proceedings. 1986 IEEE International Conference on Robotics and Automation.

[7]  Thomas C. Henderson,et al.  A Survey of General- Purpose Manipulation , 1989, Int. J. Robotics Res..

[8]  Günter Wöhlke,et al.  An action-based process model for dextrous multifinger hands , 1991, J. Intell. Robotic Syst..

[9]  Bernard Roth,et al.  Analysis of Multifingered Hands , 1986 .

[10]  Randy C. Brost,et al.  Automatic Grasp Planning in the Presence of Uncertainty , 1988, Int. J. Robotics Res..

[11]  S. Shankar Sastry,et al.  Dextrous robot hands: several important issues , 1989 .

[12]  J. A. Coelho,et al.  Online grasp synthesis , 1996, Proceedings of IEEE International Conference on Robotics and Automation.

[13]  Christian Laugier,et al.  Planning dextrous operations using physical models , 1994, Proceedings of the 1994 IEEE International Conference on Robotics and Automation.

[14]  Stamatios K. Andreadakis,et al.  Analysis and synthesis of decision-making organizations , 1988 .

[15]  Joel W. Burdick,et al.  On force and form closure for multiple finger grasps , 1996, Proceedings of IEEE International Conference on Robotics and Automation.

[16]  Christos H. Papadimitriou,et al.  The Geometry of Grasping , 1990, Int. J. Robotics Res..

[17]  Huan Liu,et al.  Robot hand-eye coordination: shape description and grasping , 1988, Proceedings. 1988 IEEE International Conference on Robotics and Automation.

[18]  Kostas J. Kyriakopoulos,et al.  Description and kinematic analysis of the Anthrobot-2 dextrous hand , 1992, Proceedings of the 1992 IEEE International Symposium on Intelligent Control.

[19]  Roderic A. Grupen,et al.  Optimal multifingered grasp synthesis , 1994, Proceedings of the 1994 IEEE International Conference on Robotics and Automation.