| This paper took a general design simulation platform as the engineering background, discussed design methods for realizing an economical, general-purpose UAV overall design simulation platform. When designing and developing a distributed platform adapting to different types of experimental studies, the paper focused on studying and implementation on the openness of the simulation platform based on Ethernet information management, the general communication model and hybrid network mode of the distributed simulation platform based on XML, multiple tasks scheduling and console synchronous of the simulation platform.First, the paper established the demand model for the overall design simulation platform and distribution model figure for each branch of the simulation system using modeling and analysis methods of software engineering demand, and put forward the key problems in the development of the UAV overall design simulation platform.Then the paper studied registration interactive communication protocols based on Ethernet, established the hybrid network communication model, solved the problems of lost package, transmission abnormalities in the Ethernet-based communication protocols when it being used in engineering realization, perfected the application layer protocol data matching and filtering mechanism. By using the high-level agreement function, Users need not change the source program when they want to change the sending and receiving data formats. On the basis of analyzing the openness expand demand in the simulation platform, the paper designed XML mechanisms for fast platform construction, performed parameters modeling, established XML global configuration files, accomplished automatic links among different simulation nodes and global XML file, realized an open overall simulation platform with good ability of reconstruction.Finally, based on the function module distribution of the overall design simulation platform, the multiple tasks scheduling strategy and clock synchronization strategies were brought up. Multitasks of the console were created by using multithreading, and the synchronization among tasks were realized by interrupt clock counting.The general simulation platform developed in the paper was already installed and delivered to the user, and the whole simulation system is running well at present. The platform greatly supports various types of research work for new planes and has important national defense construction significance. |
