Improving availability and safety of control systems by cooperation between intelligent transmitters

Florent Brissaud (1, 2) , Anne Barros (3) , Christophe Bérenguer (3)

1 INERIS - Institut National de l'Environnement Industriel et des Risques
2 UTT - Université de Technologie de Troyes
3 LM2S - Laboratoire Modélisation et Sûreté des Systèmes

“Intelligent transmitters” taking part in distributed and networked control systems are considered. Such sensor systems are able to perform internal data processing, advanced functionalities (e.g. self-diagnoses, online reconfiguration), and to exchange information. A control system made up of cooperating transmitters is therefore presented, using procedures which aim to improve system availability and safety. Taking advantage of the information exchanged between transmitters, two algorithms are proposed in order to i) retain the most confident values for transmitter processing, and ii) perform diagnoses by result comparisons. The control system is modelled by stochastic and coloured Petri nets, and dependability evaluations are performed by Monte Carlo simulations. Availability and safety can be put in balance through the use of the proposed algorithms, and both criteria can be improved under some conditions, notably according to diagnostic coverage of failures.

Mots clés: networked control system; intelligent transmitter; availability; distributed control system

Domaines: Autre; Automatique / Robotique

Florent Brissaud, Anne Barros, Christophe Bérenguer. Improving availability and safety of control systems by cooperation between intelligent transmitters. International Probabilistic Safety Assessment & Management Conference, PSAM 10, Jun 2010, Seattle, United States. Improving availability and safety of control systems by cooperation between intelligent transmitters. ⟨hal-00507468⟩