Fault-tolerant control method for actuator and component faults applied to a hydraulic system

Author

Ponsart, Jean-Christophe ; Theilliol, Didier ; Noura, Hassan

Author_Institution

Centre de Rech. en Autom. de Nancy, Univ. Henri Poincare, Vandoeuvre-les-Nancy, France

fYear

2001

fDate

4-7 Sept. 2001

Firstpage

1044

Lastpage

1049

Abstract

In this paper, a fault-tolerant control method is developed for actuator and component faults. Its principle is based on the on-line nonlinear estimation of a quantity which is equal to zero in the fault-free case and equal to the fault-magnitude when a fault occurs on the system. This estimation is computed from an extended Kalman filter used as an observer. The interest of the method is to consider a nonlinear model of the system, controlled with an exact linearization input-output by state feedback. Then a new control law is added to the nominal one in order to compensate the fault effect on the system. The performances of the method are tested in simulation on a hydraulic system.

Keywords

Kalman filters; actuators; fault diagnosis; fault tolerant control; hydraulic systems; linearisation techniques; nonlinear control systems; nonlinear estimation; nonlinear filters; observers; state feedback; actuator; component fault; control law; exact linearization input-output; extended Kalman filter; fault effect; fault-free case; fault-magnitude; fault-tolerant control method; hydraulic system; nonlinear model; observer; online nonlinear estimation; state feedback; Actuators; Additives; Degradation; Estimation; Fault tolerance; Fault tolerant systems; Vectors; fault compensation; fault estimation; fault-tolerant control; nonlinear system; three-tank system;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (ECC), 2001 European

Conference_Location

Porto

Print_ISBN

978-3-9524173-6-2

Type

conf

Filename

7076052