Development and Application of a Functional Analysis Method for Aero Engine Requirement Management

Civil aero engine is a typical complex product, the development of complex product and system is characterized by high comprehensive integration, high functional coupling. With the development of technology, the design of civil aero engine has become more comprehensive and not only requires the high performance, high reliability, long-life, but also need effective approaches to create successful products. Systems engineering is a methodical, recommend approach for the development of complex product, and functional analysis plays an important role in systems engineering of requirement management process, by using a functional analysis method capture and analysis the function of civil aero engine improve the completeness of requirements, and provide a common understanding of the product. In this work, a functional analysis method is illustrated based on operating modes and using context diagram to identify functions of system. The proposed approach is studied and applied to propulsion system to prove that the method is effective. The typical operating modes of propulsion system are outlined, and the functions of propulsion system promote the definition of requirement document. Furthermore, the functional analysis method can also be widely used in aero engine systems and sub-systems and component levels.