Title :
Further results on adaptive robust control of uncertain time-delay systems
Author :
Xu, S. ; Feng, G.
Author_Institution :
Sch. of Autom., Nanjing Univ. of Sci. & Technol., Nanjing
fDate :
5/1/2008 12:00:00 AM
Abstract :
The problem of adaptive robust control for uncertain systems with multiple time delays is considered. The parameter uncertainties are assumed to be time-varying norm-bounded, whose bounds are unknown. The objective is to design adaptive robust state-feedback controllers such that the resulting closed-loop system is globally uniformly exponentially convergent to a ball with a certain convergence rate. In terms of a linear matrix inequality, a sufficient condition for the solvability of this problem is presented and the expression of a desired adaptive robust state-feedback controller is given. It is shown that the result obtained improves certain existing ones in the literature.
Keywords :
adaptive control; closed loop systems; delays; linear matrix inequalities; robust control; state feedback; uncertain systems; adaptive robust control; closed loop system; linear matrix inequality; multiple time delays; parameter uncertainties; state feedback controllers; time-varying norm-bounded; uncertain systems;
Journal_Title :
Control Theory & Applications, IET
DOI :
10.1049/iet-cta:20070221