嫦娥四号中继星伞状可展开天线关键技术研究
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摘要
嫦娥四号中继星伞状可展开天线采用发射时收拢、入轨后展开的可展开结构方案,有效地解决了中继星应用中的多项技术难题.天线在轨成功展开、在轨性能稳定和承受极低温环境性能不发生破坏是保证中继通信任务成功的前提,对应了天线展开技术、在轨性能稳定性控制技术和极低温环境适应技术等三项关键技术.本文首先对天线展开技术开展研究,设计采用了缓释弹簧分布式驱动展开技术,对展开技术方案进行了介绍,开展高低温环境下天线展开可靠性验证,为天线在轨展开环境选择提供了指导;其次,开展在轨性能稳定性控制技术研究,从材料选择、结构设计和提高反射面平衡态稳定性等方面采用控制措施,进行天线在轨热分析和热变形测试及预示,结果表明在天线最大在轨热变形情况下,天线型面精度仍满足指标要求,确保了天线在轨性能满足任务要求,并验证了天线在轨热变形控制措施的有效性;第三,针对天线在轨经历极低温环境,设计了部件级试验验证结合整机仿真分析的试验验证方法,很好地解决了极低温环境的验证问题,天线经历极低温存储后,结构无损坏,性能无下降,满足天线在轨环境适应性的要求,有效地支撑了嫦娥四号中继星中继通信任务的顺利执行.
The radial rib deployable antenna is critical for Chang'e-4 relay satellite. The antenna can be stowed for launch and precisely deploy on the orbit. The deployment of the mechanism, the on-orbit stability of surface accuracy and the validation under the extreme low temperature are the keys for the success of relay satellite. The distributed spring-driven mechanism for the antenna is firstly proposed in this paper. The spring is released slowly in the deployment. The mechanism is verified in the high and low temperature. Secondly,the material and structure of the antenna are optimised for the high stability of surface accuracy. The surface accuracy of the antenna is analysed under extreme conditions. The maximum thermal distortion is far superior to the requirement. The extremely lowtemperature experiments are finally designed for validating the capability of antenna based on the simulation of on-orbit environment.The results show the performance of the antenna is unvarying under the extreme low temperature. The radial rib deployable antenna can satisfy all the requirements on orbit and guarantee the success of the relay mission of Chang'e-4 satellite.
The radial rib deployable antenna is critical for Chang'e-4 relay satellite. The antenna can be stowed for launch and precisely deploy on the orbit. The deployment of the mechanism, the on-orbit stability of surface accuracy and the validation under the extreme low temperature are the keys for the success of relay satellite. The distributed spring-driven mechanism for the antenna is firstly proposed in this paper. The spring is released slowly in the deployment. The mechanism is verified in the high and low temperature. Secondly,the material and structure of the antenna are optimised for the high stability of surface accuracy. The surface accuracy of the antenna is analysed under extreme conditions. The maximum thermal distortion is far superior to the requirement. The extremely lowtemperature experiments are finally designed for validating the capability of antenna based on the simulation of on-orbit environment.The results show the performance of the antenna is unvarying under the extreme low temperature. The radial rib deployable antenna can satisfy all the requirements on orbit and guarantee the success of the relay mission of Chang'e-4 satellite.
引文
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8朱敏波,曹峰云,刘明治.星载大型可展开天线太空辐射热变形计算.西安电子科技大学学报(自然科学版),2004,31:27-31
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10徐海强,朱敏波,杨艳妮.星载天线的热分析技术方法研究.强度与环境,2007,34:39-44
2 Wang Q,Liu J.A Chang’E-4 mission concept and Vision of future chinese lunar exploration activities.Acta Astronaut,2016,127:678-683
3 Mimoun D,Wieczorek M A,Alkalai L,et al.Farside explorer:Unique science from a mission to the farside of the moon.Exp Astron,2012,33:529-585
4吴伟仁,王琼,唐玉华,等.“嫦娥4号”月球背面软着陆任务设计.深空探测学报,2017,4:111-117
5张华振,马小飞,宋燕平,等.星载高精度环形网状天线设计方法.中国空间科学技术,2013,10:1-6
6李团结,马小飞.大型空间可展开天线技术研究.空间电子技术,2012,3:35-39
7张惠峰,关富玲.可展桁架天线热-结构耦合分析.浙江大学学报(工学版),2010,12:2320-2325
8朱敏波,曹峰云,刘明治.星载大型可展开天线太空辐射热变形计算.西安电子科技大学学报(自然科学版),2004,31:27-31
9王朋朋,薛永刚,高博.伞状天线张力绳索热变形敏感性分析.空间电子技术,2014,3:20-24
10徐海强,朱敏波,杨艳妮.星载天线的热分析技术方法研究.强度与环境,2007,34:39-44