Szukana fraza: [Abstract = "An unknown input LPV observer is designed to estimate simultaneously system states and faults. Sufficient conditions to guarantee stability and robustness against the uncertainty provided by the unmeasurable scheduling functions and the influence of disturbances are synthesized via a linear matrix inequality \(LMI\) formulation by considering H\[the sign of infinity\] and Lyapunov approaches. The performances of the proposed method are illustrated through the application to an anaerobic bioreactor model."]