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Observer-based residual design for nonlinear systems with unknown inputs
conference contributionposted on 2017-12-06, 00:00 authored by Poh TehPoh Teh
This paper presents unknown-input observer-based approach for robust fault detection and isolation of a class of nonlinear Lipschitz systems subject to unknown inputs or disturbances. Residual signals are generated by bank of observers to detect and isolate between actuator faults and sensor faults. The effect of unknown inputs or disturbances can be decoupled from the residual signals by using the generalized inverse method. Necessary and sufficient conditions for the existence and stability of low-order nonlinear unknown input functional observer are derived. A design procedure for the generation of residual signals to detect and isolate actuator and sensor faults is developed using the proposed unknown-input observer-based solution.
Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)
Parent TitleProceedings of the 2011 Australian Control Conference, 10-11 November 2011, Melbourne Australia
Number of Pages7
Place of PublicationMelbourne, Vic.
External Author AffiliationsFaculty of Sciences, Engineering and Health; Institute for Resource Industries and Sustainability (IRIS);