载人飞行器在轨视景仿真图像抖动研究  

Image Jittering of On-orbit Manned Spacecraft Visual Simulation

作　　者：陈学文[1] 张炎[1] 

机构地区：[1]中国航天员科研训练中心人因工程重点实验室,北京100094

出　　处：《系统仿真学报》2013年第7期1592-1597,共6页Journal of System Simulation

基　　金：中国航天医学工程预先研究项目;国家高技术研究发展计划(2009AA02Z411)

摘　　要：在航天员训练用的飞行程序训练模拟器视景仿真中,为了获得较好的视景图像效果,往往需要使用GPU进行视景仿真计算,然而载人飞行器在轨飞行时,飞行器相对地球惯性坐标系位置数据值大,已超出单精度GPU有效表达范围,导致视景图像抖动。详细分析视景图像抖动产生的原因,给出消除图像抖动的仿真方法,并提出评估图像抖动大小的计算方法。最后,以计算用例对比该计算方法与观察实际仿真图像效果,证实了该计算方法的有效性。该计算用例同时验证了消除图像抖动仿真方法的合理性和有效性。In visual simulation of spaceflight training simulator for astronaut training, the numerical value of position of on-orbit manned spacecraft is big, and extends the range of single float type of GPU, and this results in image jittering of on-orbit manned spacecraft. The solution of eliminating image jittering was described in detail, which was float type selection, long measure selection, and coordinate selection and transform. The formula of computing image jittering was brought forward, and the magnitude of image jittering of one example of visual simulation was computed by using the formula, and the result of computation and the result of view the actual visual image are identical. It demonstrates that the formula can be used to evaluate the magnitude of image jittering effectively. The example of computation which testified the method of the eliminating image jittering is rational and effective.

关 键 词：视景仿真 图像抖动 飞行程序训练模拟器 坐标变换 浮点数 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]