“…The existence of time delay quite often degrades the performance of the control system, or even destabilizes the whole system. In recent literature, many significant results on the analysis of and control design approaches to delay systems have been reported (Mobayen, 2014, 2015a,b; Majd and Mobayen, 2015; Jajarmi et al., 2016; Mobayen and Tchier, 2016; Nategh et al., 2017). Meanwhile, the ILC for delay systems has been the focus of many researchers (Chen et al., 1998; Sun and Wang, 2001a; Li et al., 2008; Meng et al., 2009; Shen et al., 2011).…”