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Monitoring based on Analytical Redundancy for a Primary Flight Surface Electromechanical Actuator

par Wauthion, Benjamin ;Paul, Alexandre;Telteu-Nedelcu, Dan;Kinnaert, Michel
Référence More Electric Aircraft - Towards cleaner aviation(6: 20-21/10/2021: Bordeaux, ENSEIRB-MATMECA building, Avenue des Facultés, 33400 Talence, France), MEA'21 PROCEEDINGS
Publication Publié, 2021-10-20

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Résumé :

Our objective is to develop a monitoring algorithm that achieves early detection of degradations that may lead to jamming in the electromechanical actuators (EMAs) used for primary flight control. To this end, a detailed EMA model is determined in order to construct a simulator able to reproduce test bench results and simulate faulty behaviours. Exploiting the analytical redundancy existing in the dynamical equations of the EMA model, a residual generator is designed. This generator is then used to obtain residuals sensitive to a potential friction change by using the typical measurement sequences associated to pre-flight test profiles. An enhanced residual is then proposed in order to take advantage of the repetitive nature of the input profile to highlight in a better way the friction faults. Tests are conducted on both simulator and test bench data sets under various friction situations and the application of the fault detection algorithm allows to identify the change in the friction behaviour.