Oscillatory Failure Detection for Flight Control System Using Voting and Comparing Monitors

Oscillatory failure cases(OFC)detection in the fly-by-wire(FBW)flight control system for civil aircraft is addressed in this paper. First,OFC is ranked four levels:Handling quality,static load,global structure fatigue and local fatigue,according to their respect impact on aircraft. Second,we present voting and comparing monitors based on un-similarity redundancy commands to detect OFC. Third,the associated performances,the thresholds and the counters of the monitors are calculated by the high fidelity nonlinear aircraft models. Finally,the monitors of OFC are verified by the Iron Bird Platform with real parameters of the flight control system. The results show that our approach can detect OFC rapidly.



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