LRU Metamodeling And Its Implementation For Aircraft Maintenance

LRU(Line Replaceable Unit) model is the basic unit of the aircraft maintenance training device, which achieves kinds of functions based on functions of LRU model. Seeing the aircraft maintenance training device as a platform, the text strives to create a unified and standardized LRU meta-model, which can meet the modeling needs of different types of LRU,such as electrical, mechanical and engine, under the premise of the characteristics of LRU model.Firstly, the research discusses the Research Status of the aircraft maintenance training device, its type and core component, elaborates the concept of meta-model, its element and its research; It defines the LRU and analyzes its properties and classification; Based on the main content of the work in aircraft maintenance, the text summarizes what work of aircraft maintenance should be simulated in aircraft maintenance simulation, to arrive the aiming maintenance behavior simulated by aircraft maintenance training device; In accordance with the aiming maintenance behavior, the research gives the definition of LRU model for aircraft maintenance simulation, and detail the maintenance property which LRU model should meet.Secondly, according to the definition of meta-model and the core part of the requirements of the aircraft maintenance training device, defining the LRU meta-model and analysis its elements, types and structures. The paper establishes the geometric model library of LRU meta-model using 3DMAX software, and create other basic models of LRU meta-model by mathematical form of UML class diagram, including behavioral model, port model and functional unit model. Integrating basic models which has been built to achieve the three-dimensional model and function-model respectively, and then integrating the three-dimensional model and function-model to comply LRU meta-model ultimately.Finally, choosing LRU whose the types are computer, sensor and machinery for the study,and selecting maintenance properties and maintenance behaviors which can be satisfied with the above-mentioned LRU from LRU meta-model, to achieve these LRU model respectively.