China's first satellite "refueling": only a handful of countries can do
Science and technology daily, Changsha, June 30 (special correspondent Wang held reporters Tang Xianwu) 30th learned from the National University of Defense technology, designed by the school developed, incorporates the long seventh carrier rocket launched "source first" satellite orbital filling experimental payloads, has successfully completed under microgravity fluid management and filling, high accuracy measuring 9 in-orbit test of propellants. Received in the Beijing Aerospace command and control center data telemetry and data transmission indicate that Chinese satellites in orbit for the first time raised the successful trials.
"First day source" notation is China's first satellite in orbit flight test systems, high integration, autonomy, good stability and so on. Days after carrying the long seventh carrier rocket blasted off, "tianyuan first" satellite orbital filling according to schedule key technology testing and validation, gets 3 tank filling the whole process of complete video and associated data raise stable, high precision of measurement and control, test results meet the design requirements.
Item charge, satellite orbital filling a similar aerial refueling aircraft, by means of direct transmission of gas and liquid supplies for satellites, can significantly extend the satellite in-orbit life, improve mobility. It is estimated that if the supply to satellites in the geostationary orbit 60 kg of fuel, you can extend the satellite life 12 months, creating nearly a billion of economic value. Therefore, satellite orbital filling is international space research focus, only United States, very few countries carried out the experiment.
In recent years, Defense Technology University joint domestic more than advantage units, on "satellite in rail raises technology" for has in-depth system research, in "micro-gravity conditions Xia fluid migration and the stability analysis", theory research aspects made important breakthrough, has conquer satellite reliable docking, and pipeline efficient sealed, and advance agent stable transmission and the precise measurement, series key technology, development out more than 30 more than Taiwan sets ground principle prototype, get invention patent more than 20 more than items, part technology index reached international advanced level.
(Editors: Zhong Qinghui UN660)
2016-07-01 14:13:31
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中国首次实现卫星“空中加油”：仅少数国家能做到
科技日报长沙6月30日电(特约记者王握文 记者唐先武)记者30日从国防科技大学获悉，由该校自主设计研制、搭载长征七号运载火箭发射升空的“天源一号”卫星在轨加注实验载荷，已成功完成微重力条件下流体管理与加注、高精度推进剂测量等9项在轨试验。北京航天飞行控制中心收到的遥测与数传数据表明，我国首次卫星在轨加注试验取得成功。
“天源一号”是我国首个卫星在轨加注飞行试验系统，具有集成度高、自主性强、稳定性好等特点。搭载长征七号运载火箭升空后的几天里，“天源一号”根据预定计划进行了卫星在轨加注核心关键技术试验与验证，获取了3种贮箱加注全过程的完整视频和相关试验数据，加注过程稳定，测量与控制精度高，实测结果满足设计指标要求。
据项目负责人介绍，卫星在轨加注类似飞机空中加油，通过直接传输的方式对卫星进行气、液补给，可大幅延长卫星在轨寿命，提高卫星机动能力。据测算，如果给静止轨道上的卫星补给60公斤燃料，即可延长卫星寿命12个月，创造近亿元的经济价值。因此，卫星在轨加注一直是国际航天领域的研究热点，目前仅有美国等极少数国家开展过此项试验。
近年来，国防科技大学联合国内多家优势单位，对“卫星在轨加注技术”进行了深入系统研究，在“微重力条件下流体迁移及稳定性分析”等理论研究方面取得重要突破，先后攻克卫星可靠对接、管路高效密封、推进剂稳定传输及精确测量等一系列关键技术，研制出30余台套地面原理样机，获得发明专利20余项，部分技术指标达到国际先进水平。
(责任编辑：钟庆辉 UN660)
2016-07-01 14:13:31
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