Design of Networked Control Systems (NCSs) on the basis of interplays between Quality of Control and Quality of Service

Xuan Hung Nguyen (1) , Guy Juanole (1)

1 LAAS-SARA - Équipe Services et Architectures pour Réseaux Avancés

Abstract--The goal of this paper is to consider a co-design approach between the controller of a process control application and the frame scheduling of a Local Area Network (LAN). More precisely we present a bi directional relation between the Quality of Control (QoC) provided by the controller and the Quality of Service (QoS) provided by the LAN (relation noted QoS⇋QoC). We present, first, the implementation of the relation QoS→QoC on the basis of a compensation method for time delays called dominant pole method, and second, the implementation of the relation QoC→QoS on the basis of the hybrid priorities for the frame scheduling. The final objective is the implementation of the bidirectional relation QoS⇋QoC which is the combination of the both relations QoS→QoC and QoC→QoS in order to have a more efficient NCSs design.

Mots clés: Networked Control System; MAC protocol; Automatic Control; Co-Design; Quality of Service; Quality of Control; delay compensation

Domaines: Systèmes embarqués

Xuan Hung Nguyen, Guy Juanole. Design of Networked Control Systems (NCSs) on the basis of interplays between Quality of Control and Quality of Service. 2012. ⟨hal-00668491v1⟩