近地空间航天员训练视景真实感渲染技术研究

载人航天任务中，地面模拟训练是培养提升航天员操作技能的重要手段。视景系统是航天飞行训练模拟的重要组成部分，高逼真度的仿真场景对提升航天员训练效果有重要的意义。针对空间视景仿真场景调度和渲染的特殊性，提出并设计实现视景仿真软件的总体架构。对影响空间场景真实感的地球纹理数据库的生成和调度技术、大气散射仿真技术、场景光照实时渲染等关键技术进行研究，融合各种方法，在视景仿真系统中基于GPU实现。试验验证表明，实现算法准确，模型设计合理，已经应用于航天员的训练中。

Research on Visual Realistic Rendering Technology of Near Earth Space for Astronaut Training

In manned space missions, training on the ground is an important method for improving the astronauts operation skills. Visual system is a critical component of space flight simulation. It is of great significance for high-fidelity scene to improve the astronauts training effect. Aiming at the specificity of the dispatch and the rendering of the space visual scene, the architecture of the visual system was proposed and designed. The technique of the dispatch of the earth texture database af- fecting the reality of the space scene, the technique of atmospheric scattering, and the technique of real-time illumination rendering were researched. These methods were achieved based on GPU in the visual system simulation. Experiments proved that the algorithm was accurate and the model was designed reasonably. These methods have been successfully used in the astronaut training system.