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.
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Jun XU received the B.S. degree in Applied Mathematics from Southeast University, China, in 2001 and the Ph.D. degree in Electrical and Electric Engineering from Nanyang Technological University, Singapore, in 2007. He worked in Data Storage Institute of Singapore in 2001–2002 and Nanyang Technological University in 2006 and joined Temasek Laboratories of National University of Singapore in November 2006, where now he is a research scientist. His research interests include fault detection and isolation, switched systems, and multiple-agent systems.
Kai Yew LUM received the Diplôme d’Ingénieur from the Ecole Nationale Supérieure d’Ingénieurs Electriciens de Grenoble, France, in 1988 and his M.S. and Ph.D. degrees from the University of Michigan, Department of Aerospace Engineering, in 1995 and 1997, respectively. He worked in the DSO National Laboratories, Singapore, as a junior engineer from 1990 to 1993, then as a senior engineer from 1998 to 2001, specializing in control and guidance technologies. He joined Temasek Laboratories at the National University of Singapore in 2001, where he is currently a principal investigator of research programmes in control, guidance and multi-agent systems. His research interests include nonlinear dynamics and control, estimation and optimization, reduced-order modelling, and control in aerodynamics. He is a member of IEEE Control Systems Society, and AIAA.
Ai Poh LOH is currently the Deputy Head for academic programmes at the Department of Electrical and Computer Engineering, National University of Singapore. She received her Bachelor of Engineering (Electrical, First Class Honours) degree from the University of Malaya at Kuala Lumpur in 1983 and her Doctor of Philosophy in Control from Oxford University in 1986. Her postgraduate work was made possible by a scholarship from the Kuok Foundation. From 1986–1989, she was with the University of Auckland, New Zealand, first with a postdoctoral fellowship followed by a lecturership. She has been a lecturer at NUS since 1989. From 1994 to 1997, she spent 3 years at the Department of Mechanical Engineering, Massachusetts Institute of Technology, USA, as a visiting lecturer. Her research interests are mainly in the areas of relay feedback systems, nonlinear control, autotuning and fault detection.
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Xu, J., Lum, K.Y. & Loh, A.P. A gain-varying UIO approach with adaptive threshold for FDI of nonlinear F16 systems. J. Control Theory Appl. 8, 317–325 (2010). https://doi.org/10.1007/s11768-010-0021-z
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DOI: https://doi.org/10.1007/s11768-010-0021-z