Research on model-based safety analysis of flight control system

Aiming at the problem of safety analysis of flight control system, a safety analysis method based on extended system model (ESM) is proposed. Firstly, the nominal model of the system is established by Simulink. Secondly, the fault is injected into the nominal model to obtain the ESM, and the system response under the fault condition is observed and the system safety is analyzed. Finally, taking a control surface system (ailerons/rudder) as an example. The results show that the system fault expansion model which keeps the integrity and consistency of the model, can simulate the system fault multi-state mode, and ensures the accuracy and integrity of the safety analysis results. © 2021, Editorial Office of Systems Engineering and Electronics. All right reserved.