FDI of disturbed nonlinear systems: A nonlinear UIO approach with SOS techniques

Author

Xu, Jun ; Lum, Kai Yew ; Xie, Lihua ; Loh, Ai Poh

Author_Institution

Temasek Labs., Nat. Univ. of Singapore, Singapore, Singapore

fYear

2010

fDate

28-30 June 2010

Firstpage

255

Lastpage

260

Abstract

This paper presents a novel unknown input observer (UIO) design method for fault detection and isolation (FDI) of a class of nonlinear affine systems with disturbance. By using Lie geometry and sum-of-squares (SOS) theory as the main tools, a simple and systematic design procedure is proposed. Compared with the traditional UIO design, the rank constraint is much relaxed. Meanwhile, we show that the threshold can be easily obtained from a L₂ gain result using a SOS formulation.

Keywords

fault diagnosis; geometry; nonlinear systems; observers; FDI; Lie geometry; SOS techniques; disturbed nonlinear systems; fault detection; fault isolation; nonlinear UIO approach; nonlinear affine systems; sum-of-squares theory; unknown input observer; Design methodology; Fault detection; Geometry; Isolation technology; Laboratories; Nonlinear equations; Nonlinear systems; Paper technology; Polynomials; Safety; Fault detection and isolation; Nonlinear systems; Sums of squares (SOS); Unknown input observer (UIO);

fLanguage

English

Publisher

ieee

Conference_Titel

Cybernetics and Intelligent Systems (CIS), 2010 IEEE Conference on

Conference_Location

Singapore

Print_ISBN

978-1-4244-6499-9

Type

conf

DOI

10.1109/ICCIS.2010.5518549

Filename

5518549