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A Novel H∞ UIO Design for Actuator FDI in Finite Frequency Domain

Kai Yew Lum, Jun Xu*, Lihua Xie, and Ai Poh Loh
International Journal of Control, Automation, and Systems, vol. 9, no. 3, pp.601-605, 2011

Abstract : This paper proposes several design procedures for a class of novel unknown input observers (UIOs) to detect and isolate the actuator faults in finite frequency domain. Our approach dramatically reduces the number of UIOs required for multiple faults. Meanwhile, knowledge on the disturbance/noise is embedded to enhance the performance. All the design conditions are formulated in terms of LMI/BMI problems, which enable to consider other design specifications in addition to the robustness and sensi-tivity requirements.

Keyword : Fault detection and isolation, finite frequency domain, linear matrix inequality, unknown input observer.

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