“…Especially the observer synthesis is problematical for the cases when the model of a nonlinear delayed system contains parametric and signal uncertainties, or when the delay is time-varying or uncertain (Briat, Sename, & Lafay, 2011;Califano, Marquez-Martinez, & Moog, 2011;Darouach, 2001;Fattouh, Sename, & Dion, 1999;Germani, Manes, & Pepe, 1998;Sename & Briat, 2006;Seuret, Floquet, Richard, & Spurgeon, 2007;Zheng, Barbot, Boutat, Floquet, & Richard, 2011). An observer solution for these more complex situations are highly demanded in many real-world applications.…”