- Switching control systems have been studied for many years, and are receiving increasing attention, since in many cases, there is not a single controller which can guarantee a desired behavior. The aim of switching control is to choose an appropriate switching control law in order to achieve the suitable performance while the stability of the system in presence of uncertainty and disturbance is guaranteed. So far, asymptotic stability of switching control systems is investigated in several references, however Input to State Stability (ISS) of this normal" Keywords: Switching Control Systems, Input to State Stability, ISS Lyapunov Function, Integral Input to State Stability (iISS), Switching Signal