“…More specifically, in the considered NCS context, from modelling the ZOH behaviour as a saw-tooth function (Fridman et al, 2009;Hetel et al, 2017), refinement can be done in the stability conditions of the corresponding closed-loop system with an input timevarying delay, since its rate of variation is inherently equal to 1, which information can be used with benefit to derive the LMI-based conditions (see e.g. Hetel et al, 2017;Li et al, 2016aLi et al, , 2016bNafir et al, 2021). However, despite the advances bring by all of these studies, and since LMI-based conditions remain only sufficient ones, there is still space for conservatism improvement.…”