Exploitation of Built in test for diagnosis by using Dynamic Fault Trees: Implementation in Matlab Simulink

E. Gascard (1) , Zineb Simeu-Abazi (2)

1 TIMA - Techniques de l'Informatique et de la Microélectronique pour l'Architecture des systèmes intégrés
2 G-SCOP_GCSP - Gestion et Conduite des Systèmes de Production

This paper presents the purpose of Dynamic Fault Tree (DFT) in Matlab Simulink in order to diagnose discrete event systems. The aim is to filter false alarms in automated systems that feature dependencies. Traditional Fault Tree is a tool used for system diagnostics, but it is limited because it uses traditional logic gates (OR, AND) which do not take into consideration the time and the dependencies of automated systems. As a result, new gates have been created to make it possible to consider dynamic aspects of automata. They are called temporal and dynamic logic gates. Consequently a research work has been done upstream to describe all the functioning cases of each gate and to represent them into digital timing diagram. Then, in order to provide an easy way to built DFT and analyze automated system faults, traditional, temporal and dynamic gates have been programmed using the StateFlow library of Matlab Simulink and added to a new toolbox created especially in Simulink for the construction and the simulation of DFT.

Mots clés: logic gates; Matlab Simulink; Fault Tree temporal gates; false alarms; Dynamic Fault Tree (DFT)

Domaines: Automatique / Robotique

E. Gascard, Zineb Simeu-Abazi. Exploitation of Built in test for diagnosis by using Dynamic Fault Trees: Implementation in Matlab Simulink. ESREL 2011, Sep 2011, TROYES, France. pp.436-444. ⟨hal-00631186⟩