Autor:
Boulkroune, Boulaid ; Djemili, Issam ; Aitouche, Abdel ; Cocquempot, Vincent
Współtwórca:
Korbicz, Józef - red. ; Uciński, Dariusz - red.
Tytuł:
Robust nonlinear observer design for actuator fault detection in diesel engines
Tytuł publikacji grupowej:
Temat i słowa kluczowe:
Diesel engine ; fault diagnosis ; nonlinear unknown input observers ; LMI
Abstract:
This paper is concerned with actuator fault detection in nonlinear systems in the presence of disturbances. A nonlinear unknown input observer is designed and the output estimation error is used as a residual for fault detection. To deal with the problem of high Lipschitz constants, a modified mean-value theorem is used to express the nonlinear error dynamics as a convex combination of known matrices with time-varying coefficients. Moreover, the disturbance attenuation is performed using a modified H[the sign of infinity] criterion. ; A sufficient condition for the existence of an unknown input observer is obtained using a linear matrix inequality formula, and the observer gains are obtained by solving the corresponding set of inequalities. The advantages of the proposed method are that no "a priori" assumption on the unknown input is required and that it can be applied to a large class of nonlinear systems. Performances of the proposed approach are shown through the application to a diesel engine model.
Wydawca:
Zielona Góra: Uniwersytet Zielonogórski
Data wydania:
Typ zasobu:
DOI:
Strony:
Źródło:
AMCS, volume 23, number 3 (2013)