Variable structure model reference adaptive control of robot manipulators

S.-K. Tso, Yangsheng Xu, and Heung-Yeung Shum
Proceedings of ICRA '91, Vol. 3, May, 1991, pp. 2148 - 2153.


Download
  • Adobe portable document format (pdf) (304KB)
Copyright notice: This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. These works may not be reposted without the explicit permission of the copyright holder.

Abstract
An adaptive control scheme combining the variable structure and model reference methods is presented. With the variable structure technique, all known parameters of the robot system are fully used while the unknown parameters are adaptively adjusted. The overall control system maintains the basic structure of the computer torque controller, but incorporates adaptive components in the system. The method removes the requirement for persistent excitation, essential to traditional adaptive schemes for satisfactory operation. The control algorithm ensures the robustness of the controlled system with respect to disturbance, since the tracking error always converges to zero theoretically, rather than to an ill-defined residual set as in other adaptive schemes. Using this method, the transient response can be prescribed in advance. Thus, all the outstanding issues in adaptive control are directly treated. Simulation analysis for a two-degree-of-freedom robot is conducted to compare the method with the classical model reference method and computed torque method.

Notes

Text Reference
S.-K. Tso, Yangsheng Xu, and Heung-Yeung Shum, "Variable structure model reference adaptive control of robot manipulators," Proceedings of ICRA '91, Vol. 3, May, 1991, pp. 2148 - 2153.

BibTeX Reference
@article{Xu_1991_2349,
   author = "S.-K. Tso and Yangsheng Xu and Heung-Yeung Shum",
   title = "Variable structure model reference adaptive control of robot manipulators",
   journal = "Proceedings of ICRA '91",
   pages = "2148 - 2153",
   publisher = "Springer-Verlag",
   month = "May",
   year = "1991",
   volume = "3",
}