| Virtual Simulation is a developing technology and it is refered to many technologies such as computer graphic technology,simulationtechnology,display technology. Now it's vastly applied to aerospace vision simulation.This paper introduces the significance and background of development and method of visual system with three channels based on simulation of the satellite's orbit and attitude dynamics. It also introduces MultiGen_Creator,MultiGen_Veqa,HLA (High Level Architecture) and STK(satellite tool kit AGI inc.). This system fully supports full screen 3D graphics output and at the same time offers a stand-alone control application with graphic user interface. The high precision terrain data in the STK/Terrain modul is used as data sources, which is converted to the OpenFlight format model that Creator or Vega can discriminated . The thesis also explains the necessities of using multithread technique in the development of simulation system based on HLA and presents a conception of multithread architecture, then emphasize the method of development and design for visual simulation federation member in the frame of multithread operation. what's more, it discusses the development of visual system based on multithread architecture in detail and presents some experiences of myself. Finally the visual system is implemented on Windows2000 operation system platform with VC++6.0 integrated development environment. The entire course of the satellite's orbit and attitude control is demonstrated by the satellite model, and the scene is driven by the data of the position and attitude from the simulation modul in the three channels multi-project environment. the design and implementation of the system can provide future system development. And it can be a valuable reference visual simulation application. |
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