基于 SysML 的民机系统功能设计方法及应用

In response to the lack of formal description, weak model reusability, and insufficient establishment of dynamic models in the current civil aircraft system function design process, the concept of model-based systems engineering (MBSE) was introduced into the civil aircraft systems design process, and a set of methods for civil aircraft system function design based on the systems modeling language (SysML) was proposed. Firstly, the methods defined the use case model, abstracted the top-level functional vision of the system, and then carried out the decomposition and allocation of functions and the construction of the static function models for the system. Next, it established a function flow model of the system, and then divided the function swim lanes and constructed function interaction sequences, aiming to analyze the behavioral characteristics of the system from multiple perspectives. During this process, dynamic function models of the system were constructed by combining activity diagram, swimlane diagram, and sequence diagram. Finally, it provided the implementation of the system’s structural interface, forming a set of comprehensive function design methods with strong logic. Taking the civil aircraft avionics system as an example for function design, function models of the avionics system were established using the SysML verifying the feasibility and effectiveness of the proposed method, which was applicable to the function design of civil aircraft systems.