WHAT IS THIS DOCUMENT ABOUT? :
This paper explains an approach to BIBO stability of NARX control systems. The approach is based on dierence inequalities and assumes availability of an approximate NARX model and the system order. Sucient conditions for modelling error are derived ensuring boundedness of the error between model's and plant's outputs for the same inputs. For
this class of bounded inputs sucient conditions for BIBO stability are given and shown
practicable. They also allow designing a controller using the model, leading to BIBO stable
closed-loop system.