Progressive accommodation of actuator faults in the linear quadratic control problem

Author

Staroswiecki, Marcel

Author_Institution

Ecole Polytechnique Univ. de Lille, Lille I Univ., Villeneuve d´´Ascq, France

Volume

5

fYear

2004

fDate

14-17 Dec. 2004

Firstpage

5234

Abstract

The solution of the linear quadratic problem under actuator faults is investigated. Both fault accommodation and system reconfiguration procedures need the controller to be re-designed, which means solving the algebraic Riccati equation (ARE) associated with the faulty system model. A progressive accommodation strategy, based on the Newton-Raphson scheme for solving the ARE is proposed, and it is shown that it significantly reduces the risk associated with system instability and/or control inadmissibility which result from fault detection and isolation delay, and computation time of the accommodated control.

Keywords

Newton-Raphson method; Riccati equations; fault tolerance; linear quadratic control; stability; Newton-Raphson scheme; actuator faults; algebraic Riccati equation; computation time; fault accommodation; fault detection; faulty system model; isolation delay; linear quadratic control; progressive accommodation strategy; system instability; system reconfiguration; Control systems; Delay effects; Eigenvalues and eigenfunctions; Fault detection; Fault tolerance; Fault tolerant systems; Hydraulic actuators; Optimal control; Riccati equations; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Decision and Control, 2004. CDC. 43rd IEEE Conference on

ISSN

0191-2216

Print_ISBN

0-7803-8682-5

Type

conf

DOI

10.1109/CDC.2004.1429639

Filename

1429639