Design method of civil aircraft functional architecture based on MBSE

Model-based systems engineering (MBSE) theory has been widely used in the civil aircraft design and functional requirement analysis. Firstly, the research starts from the top-down use case of civil aircraft system product based on user requirements to identify the relevant key sub-use cases. Secondly, the method expands the "requirement-function analysis" based on the object use case, builds the black box activity diagram and sequence diagram to express the black box function flow so as to clarify the system interface and identify the subsystem, and constructs the black box state machine which is proved to be reliable and can be used for logical simulation. Finally, this paper carries out the "forward design" process of the civil aircraft functional architecture based on the man-machine interactive complex system model, and turns white the black box based on modeling analysis and numerical simulation results. Further to build a "forward design" of the system function white box architecture which realizes the relevant aircraft-level requirements. This paper selects the final approach and landing scenario which has a key effect on the safety of civil aircraft products as a case model. The research shows that the MBSE method for civil aircraft functional architecture fully guarantees the close combination of requirement analysis and functional architecture design, and constructs a structural system design method which meets the requirements of civil aircraft products. © 2019, Editorial Board of JBUAA. All right reserved.