Title :
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
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);
Conference_Titel :
Cybernetics and Intelligent Systems (CIS), 2010 IEEE Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-6499-9
DOI :
10.1109/ICCIS.2010.5518549
