Practical stability of time-delay systems: an LMI's approach

In this paper, we discuss the practical stability and practical stabilizability of a class of nonlinear systems with multiple delays. We obtain sufficient conditions based on Lyapunov-Krasovskii functionals stated in terms of the feasibility of Linear Matrix Inequalities. A ?practical exponential estimate? of the solution is also obtained. Numerical and experimental results of the practical stability of a servomecanism are presented.