Adaptive observer based fault diagnosis applied to differential-algebraic systems

Abdouramane Moussa Ali (1) , Qinghua Zhang (1)

1 SISYPHE - SIgnals and SYstems in PHysiology & Engineering

Some engineering systems are naturally described by differential-algebraic equations (DAE), whereas it may be difficult or impossible to model them with ordinary differential equations (ODE). This paper proposes an approach to fault diagnosis for systems described by DAEs. Through a particular discretization method and under realistic assumptions, the considered continuous time DAE model is transformed to an explicit state space model in discrete time. An adaptive observer is then applied to the discretized system for monitoring faults possibly affecting the system and represented by changes in model parameters.

Mots clés: extended Kalman filter; adaptive observer; differential-algebraic equations; nonlinear systems; fault diagnosis

Domaines: Automatique / Robotique

Abdouramane Moussa Ali, Qinghua Zhang. Adaptive observer based fault diagnosis applied to differential-algebraic systems. 5th Symposium on System Structure and Control, IFAC Joint Conference 2013 SSSC, TDS, FDA, Feb 2013, Grenoble, France. pp.1. ⟨hal-00988291⟩