嫦娥二号探测器在轨运行视景仿真系统的研究与实现  

Research and Implementation of a Visual Simulation System of Orbital Motion of the Chang' E-2 Spacecraft

作　　者：高兴烨[1,2] 刘建军[1] 任鑫[1] 邹小端[1] 李春来[1] 

机构地区：[1]中国科学院国家天文台,北京100012 [2]中国科学院研究生院,北京100049

出　　处：《天文研究与技术》2012年第2期114-120,共7页Astronomical Research & Technology

基　　金：国家自然科学基金(10903017);863项目(2008AA12A214)资助

摘　　要：针对嫦娥二号探测器在轨运行阶段的仿真需求,充分发挥视景仿真的优势,利用嫦娥一号探测器获得的地形和影像数据、日地月嫦娥二号探测器星历数据,基于OSG(OpenScene Graph)设计了针对嫦娥二号任务的在轨运行视景仿真系统。论述了该系统的开发平台,系统总体框架,并对系统的实现进行了详细描述。论述了月球模型数据构建,嫦娥二号探测器构建,星历数据库构建与访问,仿真实体空间位置的实时更新,CCD立体相机探测过程的仿真,视点的控制等实现方法。仿真结果表明系统完全能满足嫦娥二号任务在轨运行仿真的要求,并已应用于嫦娥二号任务执行过程中。We develop a visual simulation system of the orbital motion of the Chang＇ E-2 based on OSG （Opensencegraph） by utilizing the terrain and image data obtained from the Chang＇E-1 and the ephemeris data for the Chang＇E-2, Sun, Earth, and Moon. The system satisfies the requirements for simulating the detectors of the Chang＇ E-2 when in operation, and it has been used for practical missions of the Chang＇ E-2. We first introduce the OSG, an open-source 3D graphic engine, and then describe the design of a structural model to integrate the basic frames and components of the simulating system. We finally give the details of some implementation methods of the system, such as those of modeling the moon/Chang＇ E-2, construction/ access of the ephemeris database, update of spatial positions of simulated objects, simulation of CCD camera detection, and control of viewpoints. We show simulation results for the observation of the Chang＇ E-2 over the Sinus Iridum on the moon. The simulation system is of 4-dimensional as it incorporates the time dimension, achieving the simulation of the terrestrial-lunar spatial relationship. In addition, the system can simulate the appearance of lunar surface below the Chang＇ E-2 and the data acquisition process of the two-line CCD camera

关 键 词：视景仿真 嫦娥二号探测器 OSG 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]