Title :
A fault detection methodology for discrete nonlinear polynomial systems
Author :
Ashton, S.A. ; Shields, D.N.
Author_Institution :
Control Theor. & Applic. Centre, Coventry Univ., Coventry, UK
fDate :
Aug. 31 1999-Sept. 3 1999
Abstract :
This paper proposes a fault detection observer for classes of nonlinear models which consist of bilinear and polynomial nonlinearities up to degree three and are structured in discrete state space form. The observer is designed such that the error dynamics are time-varying and independent of unknown distubances. Sufficient conditions are given, in an efficient compact form, for a robust fault detection observer to exist, to be robust with respect to unknown disturbances and to detect a certain class of faults. An illustrative example is given.
Keywords :
bilinear systems; control nonlinearities; discrete systems; fault diagnosis; nonlinear control systems; observers; polynomials; robust control; state-space methods; bilinear nonlinearities; discrete nonlinear polynomial systems; discrete state space form; fault detection methodology; nonlinear models; observer design; polynomial nonlinearities; robust fault detection observer; sufficient conditions; time-varying error dynamics; unknown distubances; Fault detection; Mathematical model; Nonlinear systems; Observers; Polynomials; Robustness; Sufficient conditions; Fault Detection; Nonlinear; Observer; Robustness;
Conference_Titel :
Control Conference (ECC), 1999 European
Conference_Location :
Karlsruhe
Print_ISBN :
978-3-9524173-5-5