Flight Control Reconfiguration in Oscillatory Failure Case Scenarios

Research output: Contribution to journalResearch articleContributedpeer-review



A fault detection system together with a flight control reconfiguration algorithm is proposed to tackle the problem of oscillatory failure case scenarios in hydraulically actuated flight control loops. The fault detection system employs a set of residual filters designed using a model-based approach via command-input decoupling and free assignment of the filter dynamics via dynamic inversion. As underlying design model, an optimized, multi-model hydraulic
actuator approximation covering the actuator dynamics together with stochastically distributed, uncertain parameters is derived. A flight control reconfiguration algorithm is presented which smoothly transitions the control law from its normal configuration to the alternate law after detection of a fault. The performance of the transition is analyzed using advanced linear timevarying
analysis methods based on an extension of the well-known Bounded Real Lemma. The achieved detection and reconfiguration performance is verified via non-linear simulations.


Original languageEnglish
Journal IFAC-PapersOnLine
Publication statusAccepted/In press - Jul 2023


Title22nd IFAC World Congress 2023
Duration10 - 14 July 2023