Nonlinear decoupling approach to fault isolation in linear systems

Author

García, E. Alcorta ; Seliger, R. ; Frank, P.M.

Author_Institution

Dept. of Meas. & Control., Gerhard-Mercator Univ. of Duisburg, Germany

Volume

5

fYear

1998

fDate

21-26 Jun 1998

Firstpage

2867

Abstract

The problem of fault isolation in linear systems is considered. Based on a novel fault representation (multiplicative-like) and on a nonlinear decoupling transformation similar to one used for nonlinear systems, it is shown how the fault isolability can be improved. A further advantage of this approach is that it allows the application of observer-based methods to multiplicative fault representations. The price to be paid is the requirement of a nonlinear decoupling transformation as well as a nonlinear residual generation. Existence conditions as well as a design procedure are provided. An example is used to show the application of the above ideas

Keywords

fault location; linear systems; observers; transforms; fault isolability; fault isolation; linear systems; multiplicative fault representations; nonlinear decoupling transformation; nonlinear residual generation; observer-based methods; Control systems; Couplings; Fault detection; Fault diagnosis; Geometry; Linear systems; Nonlinear systems; Robustness; Safety; Solid modeling;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference, 1998. Proceedings of the 1998

Conference_Location

Philadelphia, PA

ISSN

0743-1619

Print_ISBN

0-7803-4530-4

Type

conf

DOI

10.1109/ACC.1998.688380

Filename

688380