Force fields in the manipulation of flexible materials

Assembly operations that involve flexible parts differ greatly from rigid-part assembly due to the capacity of the parts to comply with motions of the manipulators by yielding to the contact forces. This natural compliance can be exploited in the design of tasks involving the manipulation of flexible loads. Namely, using knowledge about the force vector field generated by conservative restoring forces of the load, a trajectory for the manipulator end-effector can be specified. The idea is illustrated through two case studies: an analysis of the problem of bending a flexible sheet, and experiments on an insertion task where a flexible beam has to be inserted in a hole with friction in the direction of insertion.

[1]  Matthew T. Mason,et al.  Compliance and Force Control for Computer Controlled Manipulators , 1981, IEEE Transactions on Systems, Man, and Cybernetics.

[2]  Sidney F Borg,et al.  Fundamentals of Engineering Elasticity , 1962 .

[3]  Yuan F. Zheng,et al.  Strategies for automatic assembly of deformable objects , 1991, Proceedings. 1991 IEEE International Conference on Robotics and Automation.

[4]  Neville Hogan,et al.  Impedance Control: An Approach to Manipulation , 1984, 1984 American Control Conference.

[5]  N. H. McClamroch,et al.  Feedback stabilization and tracking of constrained robots , 1988 .

[6]  Hirofumi Nakagaki,et al.  Study of Insertion Task of a Flexible Beam into a Hole , 1996 .

[7]  John J. Craig,et al.  Hybrid position/force control of manipulators , 1981 .

[8]  N. Hogan,et al.  Impedance Control:An Approach to Manipulation,Parts I,II,III , 1985 .

[9]  Bruno Siciliano,et al.  Closed-Loop Inverse Kinematics Schemes for Constrained Redundant Manipulators with Task Space Augmentation and Task Priority Strategy , 1991, Int. J. Robotics Res..

[10]  Sidney F. Borg,et al.  Fundamentals of Engineering Elasticity: (Revised 2nd Printing) , 1990 .

[11]  Neville Hogan,et al.  Impedance Control: An Approach to Manipulation: Part I—Theory , 1985 .

[12]  Yuan F. Zheng,et al.  Trajectory planning for two manipulators to deform flexible beams , 1994, Robotics Auton. Syst..

[13]  Hirofumi Nakagaki,et al.  Study of insertion task of a flexible beam into a hole , 1995, Proceedings of 1995 IEEE International Conference on Robotics and Automation.

[14]  Daniel E. Whitney,et al.  Computer-controlled Assembly , 1978 .