航天器环境试验设备计量测试系统中的电磁干扰及其抑制综述

介绍了在环境试验设备计量测试过程中常见的一些电磁干扰现象,通过对这些现象的分析,提出了一些解决问题的措施,最终达到抗干扰的目的。     

纳米材料对环氧648树脂空间环境性能影响的试验研究

文章用试验方法研究了纳米粒子对环氧 6 48树脂空间环境性能的影响 ,主要空间环境模拟试验包括真空挥发、电子辐照、常压冷热循环和热真空试验等。纳米TiO2 、SiO2 的加入能大幅度降低环氧 6 48树脂的空间出气性能。树脂的冲击强度和弯曲强度分别提高 35 %和 2 0 % ,电子辐照后性能变化不大 ,常压、真空热循环后性能有所降低 ,添加纳米材料的有些性能还有所增加     

Measuring the economic benefits of a national planetary protection policy to regulate future private space activities between Earth and Mars: Results of a contingent valuation survey in Greece

The emergence of private space actors may soon enable the growth of the novel market segments of space research and exploration, space resources utilization, and human access to space. The interdisciplinary field of Planetary Protection has to keep up with these advances. Planetary Protection is defined as a set of guidelines that aim to prevent the forward contamination of celestial bodies with biological material from Earth and the backward contamination of the terrestrial biosphere with extraterrestrial biological material. As space entrepreneurs acquire and develop the resources and competencies for commercial access to space, significant questions are expected to be raised in the future with respect to potential forward and backward contamination issues, particularly with respect to activities between Earth and Mars. Although such private activities do not seem to pose a serious Planetary Protection threat at the moment, certain preparatory steps need to be taken in order to prudently inform the relevant policy-making procedures. This work describes the application of the Contingent Valuation Method, a useful tool of the environmental economics discipline, with the aim of demonstrating a novel approach to estimate the economic valuation of the external benefits of preventing forward and backward contamination between Earth and Mars. Particularly, via a survey specifically developed for this purpose, a set of questions are used to elicit the perceived economic value that respondents place on the prevention of forward and backward contamination; the survey is administered to a national probability sample in Greece, and the generated data is processed through statistical analysis. The Contingent Valuation Method is a popular and well-established stated preference valuation technique; these techniques are often the more suitable choice for ex-ante valuations of future changes, and are currently the only known approach to capture all the aspects of the economic value of non-market goods. Through an initial proof-of-concept in Greece, the goal of this work is to provide useful insights on the expected external benefits of a national Planetary Protection policy to regulate future private space activities between Earth and Mars, and to encourage a larger-scale application of this tool in other countries around the world.     

系留气球装备环境工程浅析

主要探讨系留气球等浮空器的环境适应性设计、试验和评价；结合环境适应性工程思想，结合实际工作经验，阐述了浮空器装备全寿命期环境分析、适应性设计以及环境试验与评价等方面的工作要求。相比于飞机等短时飞行的航空器而言，对于留空时间长达数天乃至数十天的系留气球，在设计和验证过程中更应该关注其环境适应性要求。     

Current and future activities in education and public outreach at the Observatoire de Haute Provence

The Haute Provence Observatory has for primary mission the operation of telescopes, up to two meters in diameter, for the astrophysics community, and the measurements of various upper atmosphere parameters for the geophysics community. An education and outreach program has been developed with several reached: from school pupils to post-doctorate students, teachers, and the general public. In the recent years we put emphasis on the formation of teachers and on the renewal of the general public visit. Given the wide range of education and outreach activities we cover, we had to develop a relation network with individuals, amateurs, teachers and institutions, amplifying our efforts. For the future, we will try to make an optimal use of the resources available in the St Michel l’Observatoire area, taking steps to reach an agreement with the neighbouring “Centre d’Astronomie”, a structure devoted to education and public outreach belonging to the local authorities.     

降落伞充气环境对充气性能的影响

在降落伞轴向和径向动量方程的基础上进行一些合理的简化,并结合其他经验公式基本描述了降落伞整个充气阶段的运动过程。运用简化的模型初步分析了在不同大气密度、初始开伞速度下的充气环境对降落伞充气时间、充气距离,伞绳最大拉力的影响。得到的结论对火星降落伞设计及降落伞充气试验的环境模拟有一定参考意义。     

捷联惯性测量装置的综合环境应力可靠性试验

研究了捷联惯性测量装置综合环境应力可靠性试验方法，分析了捷联惯性测量装置的原理和可靠性指标，并给出了试验方案、环境应力、试验剖面和失效判据等内容。对某型战术导弹捷联惯性测量装置进行的可靠性增长试验表明，该方法可以较真实地模拟实际的使用环境。     

临近空间再生燃料电池储能系统散热风扇性能

针对平流层飞艇再生燃料电池储能系统的风冷散热组件,采用Fluent计算散热风扇在设计飞行高度不同转速条件下的风压、流量、静压效率等性能参数。进而针对海拔0~20km高度的环境温度和压力变化,计算20kW散热能力条件下散热组件风量需求及其对应风扇转速、功耗等变化趋势。在此基础上,进行散热组件不同海拔高度环境下的性能试验,风扇模型计算结果和试验数据吻合较好。结果表明风冷散热组件能够满足再生燃料电池储能系统在包括起飞、高空驻留和降落在内的整个任务周期的散热要求。     

航空发动机用环境障涂层的发展

碳化硅纤维增强碳化硅陶瓷基复合材料（CMC-SiCf/SiC）具有低密度、耐高温、高比强度等优点,是下一代高推重比航空发动机热端部件的主要候选材料之一。然而,该材料在燃气环境中面临严重的腐蚀问题。因此,需要在材料表面涂覆环境障涂层进行防护。本文综述了环境障涂层的选材要求、材料发展阶段、涂层制备技术、涂层考核与失效等,指出了环境障涂层今后在选材、制备、考核与评价的发展方向。