共查询到20条相似文献,搜索用时 937 毫秒
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CCSDS标准在军用航天任务中的应用 总被引:4,自引:3,他引:1
空间数据系统咨询委员会(CCSDS)标准已经在民用航天任务中得到广泛应用,然而对其是否也同时适用于军用航天任务,仍存在着许多的疑虑和争论。文章通过对军用航天任务采用CCSDS标准现状的调研,分析了其实现途径和可行性,提出了在军用航天任务中采用CCSDS标准的措施和建议。 相似文献
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随着航天运输频次的大幅提升,航天发射需求对航天运输系统的要求越来越高.本文从重复使用航天运输系统出发,着重阐述了以组合发动机为动力的重复使用运载器的发展起源,对组合动力运载器领域的国际发展格局与研究现状进行了分析,并且从技术角度出发,结合空天飞行任务需求和组合动力工作特性,分析了组合动力运载器发展所面临的技术挑战.文章... 相似文献
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分析当前航天产品面临的质量形势,从航天系统工程的角度,阐述航天产品的基本特性,结合工作实践,从产品方案设计的正确可行性、实现过程的简洁可靠性、系统协调匹配的兼容性、试验测试的覆盖充分性以及模拟任务的真实性等方面,提出提高设计水平和设计质量的实施途径与方法. 相似文献
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N M Samsonov L S Bobe L I Gavrilov V M Novikov N S Farafonov J I Grigoriev E N Zaitsev S J Romanov A I Grogoriev J E Sinjak 《Acta Astronautica》2000,47(2-9):129-138
The paper deals with the construction of physical/chemical life support systems of orbiting space station Mir and the Russian segment of the international space station (ISS). Based on experience gained in development and long-term operation of systems for water recovery and air revitalization balance and energy/mass characteristics of promising life support systems (LSS) are analyzed. Physical/chemical life support systems with regenerative systems updated as a result of the operation on the ISS may be used at an initial phase of manned interplanetary missions. 相似文献
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Canada is a space power with unique technical niches that support opportunities for collaboration on space technologies. When U.S.-origin space technologies are involved Canada's ability to collaborate internationally may be conditional on US law and policy. As a result, US export control law can be directly linked to the success or failure of Canadian collaboration. This article examines the strategic impact of U.S. export controls on Canadian autonomy to collaborate on international missions, including multi-use missions. Canadian space export control policy is also examined more broadly with the goal of providing specific policy recommendations that will enhance Canada's future as an international space actor. 相似文献
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In the past, space life sciences has focused on gaining an understanding of physiological tolerance to spaceflight, but, for the last 10 years, the focus has evolved to include issues relevant to extended duration missions. In the 21st century, NASA's long-term strategy for the exploration of the solar system will combine the assurance of human health and performance for long periods in space with investigations aimed at searching for traces of life on other planets and acquiring fundamental scientific knowledge of life processes. Implementation of this strategy will involve a variety of disciplines including radiation health, life support, human factors, space physiology and countermeasures, medical care, environmental health, and exobiology. It will use both ground-based and flight research opportunities such as those found in current on-going programs, on Spacelab and unmanned biosatellite flights, and during Space Station Freedom missions. 相似文献
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Fermentations performed under microgravity conditions may be used in future long duration space missions for recycling expendable life support materials. These fermentations will differ from similar fermentations performed at one gravity in the manner in which gas transfer in the fermentor is carried out. 相似文献
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Accurate estimations of the health risks to astronauts due to space radiation exposure are necessary for future lunar and Mars missions. Space radiation consists of solar particle events (SPEs), comprised largely of medium energy protons (less than several hundred MeV); and galactic cosmic rays (GCR), which include high-energy protons and heavy ions. While the frequency distribution of SPEs depends strongly upon the phase within the solar activity cycle, the individual SPE occurrences themselves are random in nature. A solar modulation model has been developed for the temporal characterization of the GCR environment, which is represented by the deceleration potential, ?. The risk of radiation exposure to astronauts as well as to hardware from SPEs during extra-vehicular activities (EVAs) or in lightly shielded vehicles is a major concern for radiation protection. To support the probabilistic risk assessment for EVAs, which could be up to 15% of crew time2 on lunar missions, we estimated the probability of SPE occurrence as a function of solar cycle phase using a non-homogeneous Poisson model [1] to fit the historical database of measurements of protons with energy>30 MeV, Φ30. The resultant organ doses and dose equivalents, as well as effective whole body doses, for acute and cancer risk estimations are analyzed for a conceptual habitat module and for a lunar rover during space missions of defined durations. This probabilistic approach to radiation risk assessment from SPE and GCR is in support of mission design and operational planning for future manned space exploration missions. 相似文献
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针对未来空间任务对能源和动力日益提高的需求,提出了基于氢化镁的核电核热双模共质空间核动力技术。该技术以一种储氢密度高、热稳定性较好,能够以常温常压储存的氢化镁作为工质,通过核能加热后氢化镁分解成为核热推进可用的高压氢气和电推进可用的单质镁,并结合高效动态热电转换系统,形成大功率核电源、大功率超高比冲核电推进、高比冲氢气核热推进以及大推力镁核热推进多种工作模式。基于氢化镁的多模共质空间核动力技术解决了低温推进剂、气态工质在空间应用时的存储安全性和存储密度低的问题,其具备的多种工作模式能够针对不同任务需求提供相应的能源或者动力输出,提高核动力飞行器任务能力。 相似文献
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Jonkmans G Andrews HR Clifford ET Frketich G Ing H Koslowsky VT Noulty RA Miller RC Zhou Y Mortimer A Peterson D Wilkinson R 《Acta Astronautica》2005,56(9-12):975-979
Bubble Technology Industries Inc. (BTI), with the support of the Canadian Space Agency, has finished the construction of the Canadian High-Energy Neutron Spectrometry System (CHENSS). This spectrometer is intended to measure the high energy neutron spectrum (approximately 1-100 MeV) encountered in spacecraft in low earth orbit. CHENSS is designed to fly aboard a US space shuttle and its scientific results should facilitate the prediction of neutron dose to astronauts in space from readings of different types of radiation dosimeters that are being used in various missions. 相似文献
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Mendell WW 《Acta Astronautica》2004,55(2):149-155
Historically, advocates of solar system exploration have disagreed over whether program goals could be entirely satisfied by robotic missions. Scientists tend to argue that robotic exploration is most cost-effective. However, the human space program has a great deal of support in the general public, thereby enabling the scientific element of exploration to be larger than it might be as a stand-alone activity. A comprehensive strategy of exploration needs a strong robotic component complementing and supporting human missions. Robots are needed for precursor missions, for crew support on planetary surfaces, and for probing dangerous environments. Robotic field assistants can provide mobility, access to scientific sites, data acquisition, visualization of the environment, precision operations, sample acquisition and analysis, and expertise to human explorers. As long as space exploration depends on public funds, space exploration must include an appropriate mix of human and robotic activity. 相似文献