卫星在轨运行实时视景仿真系统研究与实现

针对数字仿真程序的不足，在充分发挥视景仿真直观逼真效果的基础上，利用已有的数字仿真程序，将卫星轨道、姿态动力学与计算机图形学相结合，基于软件平台MuhiGen Creator和Vega开发出卫星在轨运行的实时视景仿真系统。该文对该系统的设计和实现进行了详细的描述，论述了系统主要功能和总体框架、场景的几何建模和运动建模、覆盖区域建模、运动实体的数据驱动、Vega和OpenGL的混合编程、视点的控制、经纬度的动态显示等关键技术。仿真结果表明，该系统能够逼真的展示出卫星运行的全过程，并且满足系统仿真的实时性要求。

Research and Implementation of Real-time Visual Simulation System of Satellite Motion in Orbit

According to the deficiency of digital sim~ation program, we take full advantage of the reality of scene simulation and combine the orbital kinematics of satellite with computer graphics. Based on software platform - MultiGen Creator and Vega, the visual simulation system of satellite motion in orbit is developed. This paper describes the design and implementation of visual simulation. Then, some key technologies are introduced, such as geometric modeling and kinematics modeling, overlay area modeling, data driving to player, mixed programming between Vega and OpenGL, observer controlling, longitude and latitude displaying. The simulation results show that this virtual simulation application can well simulate the motion of satellite. And besides, it can meet the real time requirement of system simulation.