“…Time scales is introduced as a PhD thesis by Stefan Hilger in 1988 which unifies continuous and discrete time systems. Recently, time scales has gained attention in control theory (Jackson et al [2009], Pawluszewicz and Bartosiewicz [2005], , Davis et al [2009b], Davis et al [2010], Bartosiewicz and Pawiuszewicz [2004], Sevim and Goren-Sumer [2012]). In computer controlled systems, constant sampling periods may not be achieved due to some practical problems like jitter, computational delays, communication delays, etc.…”