On integral input-to-state stability for a feedback interconnection of parameterised discrete-time systems

N. Noroozi, A. Khayatian, S. Ahmadizadeh and H.R. Karimi

International Journal of Systems Science, 2016, vol. 47, issue 7, 1598-1614

Abstract: This paper addresses integral input-to-state stability (iISS) for a feedback interconnection of parameterised discrete-time systems involving two subsystems. Particularly, we give a construction for a smooth iISS Lyapunov function for the whole system from the sum of nonlinearly weighted Lyapunov functions of individual subsystems. Motivations for such a construction are given. We consider two main cases. The first one investigates iISS for the whole system when both subsystems are iISS. The second one gives iISS for the interconnected system when one of subsystems is allowed to be input-to-state stable. The approach is also valid for both discrete-time cascades and a feedback interconnection of iISS and static systems. Examples are given to illustrate the effectiveness of the results.

Date: 2016
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DOI: 10.1080/00207721.2014.942242

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