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A new variable structure controller for robot manipulators with a nonlinear PID sliding surface

Published online by Cambridge University Press:  31 August 2012

Khaled R. Atia*
Affiliation:
Mechanical Design and Production Engineering Department, Faculty of Engineering, Zagazig University, Zagazig, Egypt
*
*Corresponding author. E-mail: k_atia@hotmail.com, k_atia@zu.edu.eg

Summary

In this paper a new sliding mode controller for set-point control of robot manipulators is proposed. The controller does not use any part of the robot dynamics in the control law. Thus, it is structurally simpler than other sliding mode controllers where the control law uses a nominal model of the robot dynamics. The controller uses a new nonlinear Proportional-Integral-Derivative (PID) sliding surface. The stability of the controlled robot dynamics is proved. On applying the boundary-layer approach to remove chattering, a nonlinear PID controller exists inside the boundary layer. This PID controller ensures that the error tend to zero asymptotically if there is no disturbances applied to the robot dynamics.

Information

Type
Articles
Copyright
Copyright © Cambridge University Press 2012 

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