Abstract
In this paper, a compliance control strategy for robot manipulators that employs a self-adjusting stiffness function is proposed. Based on the contact force, each entry of the diagonal stiffness matrix corresponding to a task coordinate in the operational space is adaptively adjusted during contact along the corresponding axis. The proposed method can be used for both the unconstrained and constrained motions without any switching mechanism which often causes undesirable instability and/or vibrational motion of the end-effector. The experimental results involving a two-link direct drive manipulator interacting with an unknown environment demonstrates the effectiveness of the proposed method.
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References
Chiaverini, S., Sicilliano, B., and Villani, L., 1998, “Force and Position Tracking: Parallel Control With Stiffness Adaptation,”IEEE Control Systems Magazine, Vol. 18, No. 1, pp. 27–33.
Kang, S., Kim, M., and Lee, K. -I., 1998, “Assembly of Complex Shaped Objects: A Stiffness Control with Contact Localization,”KSME Int. Journal, Vol. 12, No. 3, pp. 451–460.
Kim, K. I., 1999, “Two Strategis for Handling Unknown Loads of Two Coordinating Robots,”KSME Int. Journal, Vol. 13, No. 2, pp. 116–129.
Lewis, F. L., Abdallah, C. T., and Dawson, D. M., 1993,Control of Robot Manipulators, Macmillan Publishing Company.
Oh, S. -R., Kim H. C., Suh, I. H., You, B. -J., and Lee, C. -W., 1995, “A Compliance Control Strategy for Robot Manipulators Using a Self-Controlled Stiffness Function,”Proc. of IEEE/RSJ Int. Conf. Intelligent Robots and Systems, pp. 179–184.
Raibert, M. H. and Craig, J. J., 1981, “Hybrid Position/Force Control of Manipulators,”ASME J. Dyn. Syst. Meas. Contr., Vol. 102, No. 1, pp. 126–133.
Salisbury, J. K., 1980, “Active Stiffness Control of Manipulator in Cartesian Coordinates,”Proc. of IEEE 19th Conf. on Decision and Control, pp. 95–100.
Schutter, J. De and Brussel, H. Van, 1988, “Compliant Robot Motion II. A Control Approach Based on External Control Loops,”Int. J. of Robotics Research, Vol. 7, No. 4, pp. 18–143.
Vukobratović, M., and Tuneski, A., 1994, “Contact Control Concepts in Manipulation Robotics-An Overview,”IEEE Trans. on Industr. Electro., Vol, 41, No. 1, pp. 12–24,
VxWorks Manual, 1992,Real-Time Operating System, Wind River Systems.
Yoshikawa, T., 1987, “Dynamic Hybrid Position/Force Control of Robot Manipulators-Description of Hand Constraints and Calculation of Joint Driving Force,”IEEE J. of Robotics and Automation, Vol. 33, pp. 386–392.
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Kim, BH., Oh, SR., Suh, I.H. et al. A compliance control strategy for robot manipulators under unknown environment. KSME International Journal 14, 1081–1088 (2000). https://doi.org/10.1007/BF03185062
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DOI: https://doi.org/10.1007/BF03185062