MBSE Approach to Aero-Engine Turbine System Design and Requirements Management

In view of the problems of the traditional aero engine development, such as the design elements are difficult to reuse, the traceability of requirements is not good and lack of top-level logic verification, the model based systems engineering (MBSE) method is introduced. Apply the Harmony for Systems Engineering to the top-down design flow of aero-engine turbine system. The system requirement model is established through the creation and classification of turbine system requirements and the definition of system use cases. To establish the function model, the functional, expressive, interface, and other requirements are transformed into a clear description of the system function. The system architecture is analyzed and designed on the basis of the system function, then the function of each use case is decomposed and allocated into the subsystems and components of turbine system. Based on the system model, the requirements of the system are refined, traced and verified. The results show that the MBSE method can perfect the requirement definition, complete the mapping of the requirements to the system elements, realize the function logic verification, and support requirements verification at all stages, which provides an effective practical approach for the development of aero-engine.