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DOI:10.1007/s11768-010-0021-z |
Received:January 20, 2010Revised:January 20, 2010 |
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A gain-varying UIO approach with adaptive threshold for FDI of nonlinear F16 systems |
Jun XU,Kai Yew Lum,Ai Poh Loh |
(Temasek Laboratories, National University of Singapore;Department of ECE, National University of Singapore) |
Abstract: |
A discrete gain-varying unknown input observer (UIO) method is presented for actuator fault detection and
isolation (FDI) problems in this paper. A novel residual scheme together with a moving horizon threshold is proposed. This
design methodology is applied to a nonlinear F16 system with polynomial aerodynamics coefficient expressions, where
the coefficient expressions for the F16 system and UIOs may be slightly different. The simulation results illustrate that a
satisfactory FDI performance can be achieved even when the F16 system is under the environment of model uncertainties,
exogenous noise and measurement errors. |
Key words: Fault detection and isolation (FDI) Unknown input observer (UIO) Nonlinear estimation |