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        A model-based Technique for Early and Robust Detection of Oscillatory Failure Case in A380 Actuators

        Loïc Lavigne,Ali Zolghadri,Philippe Goupil,Pascal Simon 제어·로봇·시스템학회 2011 International Journal of Control, Automation, and Vol.9 No.1

        This paper addresses the problem of Oscillatory Failure Cases (OFC) detection in the Electrical Flight Control System (EFCS) of the Airbus airplanes. OFC can lead to strong interactions with loads and aero-elasticity and consequently are to be detected very early in time. The work describes the status of on going research activity undertaken within a collaborative project between Bordeaux University (France) and Airbus. An hydraulic actuator model is currently used as the basis for a robust analytical redundancy-based technique implemented in A380 Flight Control Computer (FCC) for detecting unauthorized oscillatory events. For upcoming and future generation aircraft (A/C), it could be re-quired to detect OFC earlier with less important amplitude. The method presented here is based on nonlinear state space modeling, associated with the same decision test as used by in-service Airbus A/C. It is shown that the model quality could be improved significantly by reliable estimating of some physical parameters. The fault indicating signals are compared on data set obtained from A380 com-puters during flight tests.

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