Abstract
A six DOF compliant wrist which combines passive compliance and active sensing has been developed to provide the necessary flexibility for force and contact control as well as being accurately controllable in position. This paper describes the compliant wrist and sensing mechanism design. Utilizing the sensed information from this wrist allows the apparent stiffness of the end-effector to be increased in unconstrained mode and decreased in constrained modes where the contact force is controlled. An active feedback control scheme for both position and force control is presented and the dynamic behavior of the system is analyzed. As the manipulator is partially constrained by the environment, a new hybrid control algorithm with consideration of passive compliance is proposed. The applicability of the method is demonstrated by experimental results. The entire system performance is analyzed under conditions with variable environment characteristics, controller parameters, and contact force, etc. A sinusoid surface tracking experiment was performed as an application of the hybrid control scheme and some useful results were obtained. The velocity discontinuity as the robot makes contact with, or breaks from, the environment is accommodated by the passive compliance of the wrist. The method shown is simple, economical, and applicable in industry.
This material is based on work supported by the National Science Foundation under Grant No. DMC-8512838. Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the National Science Foundation.
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9. References
Y. Xu and R.P. Paul, "On position compensation and force control stability of a robot with a compliant wrist", Proceedings of the IEEE International Conference on Robotics and Automation, P.1173–1178, 1988
R.P. Paul, Y. Xu and X. Yun, "Terminal link force and position control of a robot manipulator", Seventh CISM and IFToMM International Symposium on Theory and Practice of Robots and Manipulators, 1988
R. K. Roberts, R. P. Paul, and B. M. Hillberry, "The effect of wrist force sensor stiffness on the control of robot manipulators", Proceedings of the IEEE International Conference on Robotics and Automation, P.269–274, 1985
D. E. Whitney and J. M. Rourke, "Mechanical behavior and design equations for elastomer shear pad remote center compliance", ASME Journal of Dynamic System, Measurement, and Control, Vol. 108, P.223–232, 1986
V. Hayward, RCCL User's Guide, edited for CVaRL by John Lloyd, 1984
H. Inoue, Y. Tsusaka, and T. Fukuizumi, "Parallel manipulator", Proceedings of Third International Symposium of Robotics Research, P.321–327, 1986
K.J. Waldron and K.H. Hunt, "Serial-parallel dualities in actively coordinated mechanisms", Fourth International Symposium on Robotics Research, Santa Cruz, Sept. 1987
D. S. Seltzer, "Compliant robot wrist sensing for precision assembly", Robotics: Theory and Application, P.161–168, 1986
H. Kazerooni, and J. Guo, "Direct-drive, active compliant end-effector" Proceedings of the IEEE International Conference on Robotics and Automation, P.758–766, 1987
J.De Schutter, "Compliant robot motion control methods for rigid manipulators based on a generic scheme", Proceedings of the IEEE International Conference on Robotics and Automation, P.1060–1065, 1987
M. Mason, "Compliance and force control for computer controlled manipulators", in Robot Motion Planning and Control, M. Brady et al, ed., The MIT Press, Cambridge, MA, 1982, P.373–404. ch.5.
K. Salisbury, "Active stiffness control of a manipulator in cartesian coordinates", Proc. 19th IEEE Conference on Decision and Control, Albuquerque, NM, December 1980, P.87–97.
M.R. Cutkosky and P.K. Wright, "Position Sensing Wrists for Industrial Manipulators", 12th International Symposium on Industrial Robots, Paris, France, June 1982.
N. Hogan, "Impedance control of industrial robots", Robotics and Computer Integrated Manufacturing, Vol.1, No.1, 1984, P.97–113.
M.H. Raibert and J.J. Craig, "Hybrid position/force control of manipulators", ASME Journal of Dynamics system, Measurement, and Control, Vol. 102, 1981, P.126–133
C. Reboulet and A. Robert, "Hybrid control of a manipulator with an active compliant wrist", Proceedings of the Third International Symposium on Robotics Research, 1985
H.V. Brussel, H. Thielman and J. Simons, "Further developments of the active adaptive compliant wrist (AACW) for robot assembly", 11th International Symposium on Industrial Robots, Tokyo, Japan, October 1981, P.377–384.
R. Dillmann, "A Sensor Controlled gripper with tactile and non-tactile sensor environment", Proceeding of the 2nd International Conference on Robot Vision and Sensory Controls. Stuffgart, Germany, November, 1982, P.159–170
R.P.C. Paul and B. Shimano, "Compliance and control", in Robot Motion Planning and Control, M. Brady et al, ed., The MIT Press, Cambridge, MA, 1982, P.404–418, ch.5.
K. Takuse, H. Inoue, K. Sato and S. Hagiuara, "The design of the articulated manipulator with torque control ability", Fourth International Symposium on Industrial Robots, Nov. 1974
H. Asada and K. Ogawa, "On the dynamic analysis of a manipulator and its end effector interacting with the environment", Proceedings of the IEEE International Conference on Robotics and Automation, P.751–756, 1987
J-P. Merlet, "C-surface applied to the design of an hybrid force-position robot controller", Proceedings of the IEEE International Conference on Robotics and Automation, 1987
J. J. Bausch, B. M. Kramer and H. Kazerooni, "The development of compliant tool holders for robotic deburring", Robotics: Theory and Application, P.79–89
D.E. Whitney, "Force feedback control of manipulator fine motions", ASME Journal of Dynamic Systems, Measurement and Control, June 1977, P.91–97.
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© 1990 Springer-Verlag
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Xu, Y., Paul, R.P., Corke, P.I. (1990). Hybrid position force control of robot manipulator with an instrumented compliant wrist. In: Hayward, V., Khatib, O. (eds) Experimental Robotics I. Lecture Notes in Control and Information Sciences, vol 139. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0042524
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DOI: https://doi.org/10.1007/BFb0042524
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