Input Constrained Positioning Control for a Class of Euler-Lagrange Systems with Discontinuities
Access this Article
Search this Article
In this paper, a nonlinear positioning control scheme is proposed for a class of Euler-Lagrange systems acted by static friction. A compromise method of the constrained control input and the high accuracy position servo requirement is introduced to construct a <i>PD</i> -like controller. Based on the Filippov-framework, it's proved that the equilibrium point set of the closed-loop system is equal to the static solution set, which gives the maximum range of the state-steady servo error. By using the generalized Lyapunov method and Laselle's invariant principle, we prove that any trajectory of the closed-loop system will converge to the stationary set. Moveover, unlike the high gain feedback, the <i>PD</i> -like controller can regulate its feedback gain with respect to the servo error such that it is also available for the input constrained case. Finally, to demonstrate the proposed controller, some simulation results are presented.
- IEEJ Transactions on Electronics, Information and Systems
IEEJ Transactions on Electronics, Information and Systems 128(3), 493-498, 2008-03-01
The Institute of Electrical Engineers of Japan