Adaptative delta-modulation coding for networked controlled systems
Résumé
This paper investigates the closed-loop properties of the differential coding scheme known as Delta-Modulation (Delta-M ) when used in feedback loops within the context of linear systems controlled through some communication network. We propose a new modified scheme of the original form of the Delta-M algorithm which improves the closed-loop properties. Semiglobal stability with convergence to a finite ball is proved in this framework, where the domain of attraction may be arbitrarily enlarged by tuning a quantization factor Delta, in tradeoff with the precision at steady state. In a further step, parameter Delta is made adaptive, by defining an adaptation law exclusively in terms of information available at both the transmitter and receiver. With this approach, global asymptotic Stability of the Networked Controlled System is achieved for a class of unstable plants.
Domaines
Automatique / Robotique
Origine : Fichiers produits par l'(les) auteur(s)
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