Actuator Fault Tolerant System For Cryogenic Combustion Bench Cooling Circuit

Camille Sarotte (1) , J. Marzat (1) , Hélène Piet Lahanier (1) , Alessandra Iannetti (2) , Marco Galeotta (2) , Gérard Ordonneau (1)

1 DTIS, ONERA, Université Paris Saclay (COmUE) [Palaiseau]
2 CNES - Centre National d'Etudes Spatiales - Direction Des Lanceurs.

In this paper a method is proposed to design a fault tolerant control strategy based on a pressure and mass flow rate model, as well as a fault detection and isolation scheme to improve the reliability of a cryogenic bench operation. The fault is detected by the fault detection and isolation scheme composed of an extended unknown input observer, a cumulative sum algorithm and an exponentially moving average chart. Then the goal is to provide a fault tolerant system reconfiguration mechanism with a control law which compensates for the estimated actuator additive faults to maintain the overall system stability. For that purpose we use a linear quadratic regulator on an equivalent system where the unknown input is expressed as a function of the known state and known input vectors. The model and the estimation part were validated on the real Mascotte test bench (ONERA/CNES) data, and the reconfiguration control law was validated in realistic simulations.

Mots clés: CHANGE DETECTION; ACTUATOR FAULT ACCOMMODATION; CRYOGENIC SYSTEM; FAULT TOLERANT CONTROL; FAULT DETECTION; ISOLATION

Domaines: Sciences de l'ingénieur [physics]; Physique [physics]; Mathématiques [math]; Informatique [cs]

Camille Sarotte, J. Marzat, Hélène Piet Lahanier, Alessandra Iannetti, Marco Galeotta, et al.. Actuator Fault Tolerant System For Cryogenic Combustion Bench Cooling Circuit. IFAC-PapersOnLine, 2018, 51 (24), pp.592-599. ⟨10.1016/j.ifacol.2018.09.636⟩. ⟨hal-02475680⟩