大天区面积多色成像巡天载荷观测建模和仿真-《计算机技术与发展》

文章信息/Info

Title:: Modeling and Simulation of Large Sky Area and Multicolor Imaging Observation for Onboard Sky Survey Telescope

作者:: 靳召君[1; 2; 3]; 刘迎春[3]; 杨扬[3]; [1]中国科学院大学;[2]中国科学院光电研究院;[3]中国科学院空间应用工程与技术中心

摘要:: 中国下一代大型航天器在空间科学应用领域规划了一台对天观测载荷作为主载荷，主要科学目标为完成30000平方度的大天区面积多色成像深度巡天。为分析该对天观测载荷的多色巡天观测效果，文中建立了载荷巡天观测效果的系统仿真模型，包括：航天器和巡天载荷的动力学模型、对天观测约束条件模型、天区覆盖模型和载荷任务规划模型；同时在载荷的本体控制模型中分别考虑载荷仅随航天器轨道进动，载荷以固定侧视角运动和载荷以优化侧视角运动等三种不同的控制方式，对三种控制模型下的巡天观测效果进行比较。仿真结果表明，采用优化侧视角的载荷本体运动控制方式可以有效提高巡天覆盖效果。结果显示，载荷4年内进行30000平方度巡天的主要科学目标可以实现

Abstract:: A sky survey telescope is proposed to be the biggest payload of Chinese largest spacecraft in the next decade,whose primary scientific objective is to complete multicolor imaging sky survey (about 30,000 square degrees). In order to analyze the feasibility of the payload observation result,the simulation models of its space observation system are established,including the spacecraft altitude and orbit dynamic model,the payload dynamic model,the constraints model of space observational,the sky coverage model and the mission plan-ning model. Meanwhile,three different control modes of the payload in its body coordinate system are compared with each other,which are purely with orbital precession of the spacecraft,with one fixed side angle and with the optimized side angles. The results indicate that third model could effectively enlarge the observation coverage of sky survey,so that the payload could achieve its primary scientific objec-tive in about 4 years