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多全球导航卫星系统联合的探月飞行器轨道定位分析 被引量:2
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作者 陈雷 黄仰博 +1 位作者 刘文祥 欧钢 《国防科技大学学报》 EI CAS CSCD 北大核心 2015年第3期39-44,共6页
针对探月飞行器月球公转轨道上的卫星导航定位问题,以高轨道飞行器卫星导航定位的研究为基础,采用多全球导航卫星系统联合定位的方法进行仿真。分析了载波功率与噪声功率密度比为15d BHz的弱信号捕获门限下,各系统联合定位时波束主瓣和... 针对探月飞行器月球公转轨道上的卫星导航定位问题,以高轨道飞行器卫星导航定位的研究为基础,采用多全球导航卫星系统联合定位的方法进行仿真。分析了载波功率与噪声功率密度比为15d BHz的弱信号捕获门限下,各系统联合定位时波束主瓣和旁瓣的可用性,同时对各系统联合情况下的精度因子值进行分析。仿真结果表明:当接收到的卫星天线辐射的主瓣和旁瓣信号均高于载噪比门限时,全球导航卫星系统的三系统或四系统的联合能满足实时定位条件;而旁瓣损耗不加以补偿时,接收信号载噪比低于门限并导致任意联合方式均无法完成定位。各系统联合的精度因子分析表明:单系统或双系统联合的几何精度因子变化剧烈,四系统联合相比三系统联合的几何精度因子下降16.93%;三系统联合定位方案中,美国全球定位系统、中国的北斗卫星导航定位系统与欧洲的伽利略卫星导航定位系统联合方案的几何精度因子值变化最平稳,为最佳选择。理论分析和仿真结果为探月飞行器定位技术研究和星载多系统接收机设计提供参考。 展开更多
关键词 多系统联合 探月飞行器 载噪比门限 天线波束主瓣 天线波束旁瓣 几何精度因子
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探月飞行器效能评估研究与实践
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作者 傅晓晶 富小薇 +1 位作者 赵阳 宋世民 《计算机测量与控制》 2016年第9期288-291,共4页
航天器飞行效能评估是整器级测试验证以及在轨飞行结果评价中不可或缺的重要环节,针对我国探月三期月地高速再入返回飞行试验,提出了一种基于任务剖面的航天器飞行效能评估方案;提取7个任务剖面、17个约束条件,建立面向月地再入返回过... 航天器飞行效能评估是整器级测试验证以及在轨飞行结果评价中不可或缺的重要环节,针对我国探月三期月地高速再入返回飞行试验,提出了一种基于任务剖面的航天器飞行效能评估方案;提取7个任务剖面、17个约束条件,建立面向月地再入返回过程的指标评估体系;通过定量、定性指标量化计算、权重系数层次分析法计算各任务剖面的能力度量值,解决了系统目标完成能力不易定量描述的难题,实现了对月地转移段、大气层外自由飞行段、再入段、跃出段等过程自主飞行能力的科学定量评估,对后续月球无人采样返回、火星探测等探测器系统的效能评估具有一定参考意义;该方法已应用于月地高速再入返回飞行器系统。 展开更多
关键词 探月飞行器 任务剖面 效能评估
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The Chang’E-1 orbiter plays a distinctive role in China’s first successful selenodetic lunar mission 被引量:4
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作者 PING JinSong SU XiaoLi +1 位作者 HUANG Qian YAN JianGuo 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2011年第12期2130-2144,共15页
The first Chinese lunar orbiter Chang'E-1 is a successful mission with many fruitful results obtained in various disciplines. The scientific data acquired by the Chang'E-1 payloads can benefit studies of the l... The first Chinese lunar orbiter Chang'E-1 is a successful mission with many fruitful results obtained in various disciplines. The scientific data acquired by the Chang'E-1 payloads can benefit studies of the lunar origin and evolution, as well as other relevant research areas, after careful validation of the data. Among the new results, the Chang'E-1 selenodetic products are continually uncovering characteristics of the lunar surface, undersurface and inner structure. Successful lunar orbiters such as the Clementine, Lunar Prospector, KAGUYA/SELENE, Chang'E-1, Lunar Reconnaissance Orbiter and GRAIL have been revealing, with increasing clarity, global selenodetic characteristics with state-of-the-art fine resolution and high precision. In particular, the Chang'E-1 plays an important distinctive role in selenodetic exploration through enhancing lunar topography and gravity models. The gravity model has been successfully improved with a factor of two after applying the Chang'E-1 long-wavelength tracking data. Using the new models, some medium-scale lunar surface characteristics such as basins and volcanoes have been identified. Furthermore, the old mascon basins of Bouguer, gravity anomaly and craters have been discovered with the Chang'E-1 selenodetic data. 展开更多
关键词 Chang’E-1 lunar orbiter lunar science selenodesy TOPOGRAPHY GRAVITY
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Technical advancements and significance of circumlunar return and reentry spacecraft 被引量:7
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作者 YANG Meng Fei ZHANG Wu +1 位作者 PENG Jing ZHANG Gao 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2015年第4期738-745,共8页
As one of the vital steps in the 3rd phase of China's lunar exploration program (CLEP), the circumlunar return and reentry spacecraft, developed by China Academy of Space Technology (CAST), is used to demonstrate... As one of the vital steps in the 3rd phase of China's lunar exploration program (CLEP), the circumlunar return and reentry spacecraft, developed by China Academy of Space Technology (CAST), is used to demonstrate the key technologies of by- per-speed return and reentry spacecraft. The system configuration and flight process are presented in this paper, as well as the analysis of mission characteristics, the key technologies and the technical advancement during the R&D progress. The significance of circumlunar return and reentry spacecraft is given at the end. 展开更多
关键词 circumlunar return skip reentry technical advancement China's lunar exploration program (CLEP)
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