A new dextrous spherical wrist is presented here. The wrist is based upon a kinematically overconstrained and singularity-free pointing system. The pointing system and wrist are less mechanically complicated and have simpler kinematics than previously proposed systems. The mechanical simplification has enabled construction of a prototype, shown in photographs. [S1050-0472(00)00603-6]
Issue Section:
Design Innovation Brief
1.
Tsai, L. W., 1999, Robot Analysis, The Mechanics of Serial and Parallel Manipulators, Wiley, New York.
2.
Paul
, R. P.
, and Stevenson
, C. N.
, 1983
, Kinematics of Robot Wrists, Int. J. Robot. Res.
, 2
, No. 1
, pp. 31
–38
.3.
Susnjara, K. J., and Fleck, M. A., US Patent No. 4,353,677.
4.
Milenkovic, V., US Patent No. 4,907,937.
5.
Milenkovic, V., US Patent No. 4,744,264.
6.
Milenkovic, V., 1987, “New Non-Singular Robot Wrist Design,” Proceedings of the 17th ISIR/Robots11, pp. 13–29 to 13–42, SME Technical Paper MS87-290, Chicago IL.
7.
Trevelyan
, J. P.
, Kovesi
, P. D.
, Ong
, M.
, and Elford
, D.
, 1986
, “ET: A Wrist Without Singular Positions
,” Int. J. Robot. Res.
, 4
, No. 4
, pp. 71
–85
.8.
Rosheim, M., US Patent Nos. 4,686,866 4,723,460 4,729,253.
9.
Pieper, D. L., 1968, “The Kinematics of Manipulators under Computer Control,” Ph.D. Dissertation, Computer Science Dept., Stanford Univ., Stanford, CA.
10.
Williams, R. L., II, 1994, The Double Universal Joint Wrist on a Manipulator: Solution of Inverse Position Kinematics and Singularity Analysis, Proceedings of the ASME 23rd Biennial Mechanisms Conference, DE-Vol. 72, pp. 355–360, Minneapolis, MN.
11.
Stanisˇic´
, M. M.
, and Duta
, O.
, 1990
, “Symmetrically Actuated Double Pointing Systems: The Basis of Singularity-Free Robot Wrists
,” IEEE Trans. Rob. Autom.
, 6
, No. 5
, pp. 562
–569
.12.
Craig, J. J., 1989, Introduction to Robotics Mechanisms and Control, Addison-Wesley, New York.
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