Research Of Function Model For A320 EIS Based On Maintenance

Aircraft electronic instrument system is part of the aircraft display system,it can display real-time situation of airborne systems and monitor them to control aircraft status easily for crew or maintenance personnel. So simulating the function of electronic instrument system accurately is essential to maintenance simulator for normal operation, testing and fault simulation and train ability of fault isolation of maintenance personnel.Based on detailed analysis of theories of AIRBUS 320 electronic instrument system, this paper makes object-oriented analysis for the system. Focusing on variety of the date and complexity of data flow and control logic in the electronic instrument system simulation, it use advantages of Unified Modeling Language(UML), such as diversity and breadth of application, to establish the static structure model and dynamic behavior model of electronic instrument system. First of all, according to functions and structures of maintenancing electronic instrument system of A320 simulator, we use case analysis for the system, then divide all the elements within the system into different classes and determine the relationship between classes, and the purpose of it is to establish two static model: use case diagram and class diagram. Secondly, according to dynamics of electronic instrument system, such as data flow and control logic, we establish state diagram, activity diagrams and sequence diagrams of dynamic behavior model for the system. Finally, based on static structure and dynamic behavior model model established, we use VC++ language and object-oriented programming to simulate to achieve some of functions of electronic instrument system.