Delay robustness of closed loop finite assignment for input delay systems
Résumé
The problem of the robustness with respect to delay uncertainty for the finite spectrum closed loop assignment of input delay systems is addressed. Numerically exploitable conditions in terms of the maximal deviation of the design delay, and of the assigned closed loop are given. An analytic expression of a lower bound of this deviation guaranteeing stability in the monovariable and multivariable case are obtained. The Smith predictor and related schemes are also revisited.