近地太空环境的建模与仿真  

Modeling and Simulation of the Near-Earth Space Scene

作　　者：戴国俊[1,2] 刘玉庆[1] 

机构地区：[1]中国航天员科研训练中心,北京100094 [2]中国卫星海上测控部远望三号测量船,江苏江阴214400

出　　处：《计算机仿真》2011年第11期26-30,86,共6页Computer Simulation

基　　金：国防基础科研计划(B1620080001);中国航天医学工程预先研究项目(2007SY5413006)

摘　　要：研究虚拟太空环境的仿真系统,根据要求建立一个沉浸感强、真实度高的太空自然环境。所构建的模型应符合客观世界的物理规律以及人眼观察的视觉习惯。以计算天文学知识为基础,以亮星星表数据为源,通过时间和坐标系的转换,以及天体视位置的修正,准确地构造了任意时刻、任意观察点的近地太空环境模型,最后确定星空、太阳、月球的视觉成像效果,在OGRE中利用Billboard技术实现最终场景的渲染绘制。建立的环境在航天员虚拟操作训练系统中得到了很好的集成和运用,仿真结果表明,上述方法构建的近地太空环境满足航天员虚拟训练场景的逼真度和实时性要求,为设计提供依据。To build a strong immersed and high realistic space scene,the difficulty is that whether the model conforms to the law of physics of the objective world and the habit of visual sense of human being.According to the knowledge of astronomy calculation and the resource of the bright stars form data,the model of Near-earth space scene with any time and any checkpoinis is accurately constructed,and the visual images of the sky,the sun and the moon are defined through the time transformation and coordinate frame transformation as well as the modification of celestial vision position.The ultimate scene rendering is completed in OGRE by means of the technology of Billboard and has been successfully integrated and applied in the austronaut virtual training system.Simulation results show that the Near-earth space scene constructed by the method of this paper can definitely meet the fidelity and real-time requirements of visual scene in astronaut virtual training system.

关 键 词：虚拟现实 视景仿真 近地太空环境 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]