| Citation: | MA L Q，SUN X Z. Design of flight control system for BWB civil aircraft considering safety[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（4）：804-814 （in Chinese） doi: 10.13700/j.bh.1001-5965.2021.0341
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Blended wing-body (BWB) aircraft can meet the economic, environmentally friendlyand low-carbon operation needs and is one of the key development directions of future civil aviation. Aiming at the flight control system of BWB aircraft, its safety analysis and system design are studied. First, a description of the system-theoretic accident model, processes, and associated safety analysis procedure is provided. The complex logic relationship, unsafe control actions and hazard cause factors in the control system of BWB aircraft are analyzed emphatically. Then the switching system is designed. Analyzing the switching logic, the design process for both the high reliability backup system and the low reliability advanced system is presented. Finally, the simulation is carried out based on the design. The examination of the complicated logic relationships in the BWB flight control system can be understood using the applied safety analysis approach, and the designed flight control system has a certain level of safety and viability.
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