【作者】 操春燕； 李晶； 张继红； 陈海波； 高连山；

【Author】 Cao Chunyan, Li Jing, Zhang Jihong, Chenhaibo,Gao Lianshan Beijing Institute of Radio Metrology and Measurement, Beijing 100039

【机构】 北京无线电计量测试研究所；

【摘要】 原子钟在空间应用领域有着重要的应用,是卫星定位导航系统的心脏,原子钟的性能指标决定着导航系统的定位精度。被动氢原子钟因体积小、重量轻,有优良的长短稳指标和准确度指标,成为星载原子钟的新秀。星载原子钟不仅对性能指标要求高,对可靠性和环境适应性更有着苛刻的要求,其中抗振性能的好坏成为了被动型氢钟能否成功星载的最重要因素。在本文中对星载被动氢钟关键部件进行了经验性抗振设计,并采用ANSYS仿真软件对此设计进行了模态分析和随机振动分析。分析结果表明,星载氢钟的微波腔、磁屏蔽及贮存泡等关键部件能够满足星载的振动要求,根据此设计可以解决星载被动型氢钟轻量化和刚度之间的矛盾,对未来星载被动型氢钟的星载奠定了基础。更多还原

【Abstract】 Atom clocks play an important role in area of space science. In satellite navigation system, the position precision depends on performance of atom clocks. Passive hydrogen maser (PHM) becomes more attractive for its small volume, light weight, excellent long-term frequency stability and accuracy. Space born PHM has strictly demands not only on performance but also on reliability and adaptability of environment, which will be assessed by a complicated criterion. The performance of anti-vibration is crucial for the space-born PHM. In this paper, the anti-vibration of some key parts in PHM is designed by experiential. According to those designs, the analysis of mode and random vibration is computed by the ANSYS soft. The results show that the physical parts in PHM composing of microwave cavity, magnetic shield layers and quartz bulb, etc. can match the requirement of space-vibration. The anti-vibration design of PHM solves the contradiction of weight and rigidity, which will be valuable for the further space-born experiments of PHM.更多还原