Delay-dependent unknown input observer for nonlinear time-delay systems with both $H_\infty$ and $W^{1,2}$ optimality criteria
Résumé
In this chapter we address the problem of robust unknown input observer design for continuous nonlinear time-delay systems. To investigate the robustness of the studied system, we compare between two approaches both dependent on the delay, the first one is based on a standard method and the second on Sobolev norms. New sufficient synthesis conditions are given in linear matrix inequality form.