Building capacity in the basic space sciences in Southern Africa: Experiences and prospects

The basic space sciences and their supporting technologies underpin the ability of a country to utilise space applications programmes for development. By whatever measure is employed, Africa is under-represented in the international space science community. This paper reviews lessons learnt over the past 8 years with regard to sustainable capacity building in the region. At present there are a number of role-players in the space arena engaged in various capacity-building initiatives. We advocate that the emphasis of these initiatives should shift from fairly isolated capacity-building activities to comprehensive regional capacity-building programmes developed jointly by the different role-players. In order to develop such coordinated programmes, the establishment of a capacity-building forum involving the space community, the development sector and the developing countries in a region, is proposed.     

The role of the space industry in building capacity in emerging space nations

The space industry in established space-faring nations is playing an increasingly important role in the development of capacity in emerging space nations. The role of industry ranges from provision of turn-key systems, to provision of training and joint development of satellites in partnership with emerging space countries. Ranked number 1 worldwide in terms of satellites ordered in 2006, Thales Alenia Space is at the heart of the most high performance satellite technologies in both civil and defense sectors. The company has been involved in parterships with a number of emerging space nations. This paper discusses several key factors for successful interaction of industry with national space programmes in emerging space nations.     

一种获取飞机RAT带载能力的试飞方法

飞机RAT的实际带载能力不仅取决于飞机空度,而且受到飞行姿态的制约,很难用理论公式准确推算。提出了一种飞行试验方法,分析特定的试飞测试数据,可获得飞机RAT的实际带载能力。试验包括RAT平飞带载和RAT侧滑带载两部分试飞。通过RAT平飞带载试验,得到不同重量下的RAT空速与飞机空速的关系曲线;通过RAT侧滑带载试验,可得到不同侧滑角飞行下RAT空速与飞机空速的关系曲线。结合试验结果,可以确定飞机在任意重量和飞行姿态下的RAT空速,进而获知RAT实际带载能力。     

大型空间环境模拟设备中氮气源的设计

氮气源系统是根据我国大型空间环境模拟设备对纯净氮气的需要而设计的。文章介绍了该系统的主要理论计算部分,包括压缩机供气量的估算、主管路管径的选择、汽化器换热能力的计算、电加热器功率的计算等。     

民用飞机材料/标准件国产化现状分析和质量控制方法

综合能力评估是确保潜在供应商能够提供质量一致和可靠的国产材料/标准件的前提,是打造我国民用飞机材料/标准件的精品工程,是实现民机产业国产化的重要一步。通过包括工程、质量适航和特种工艺三部分的综合能力评估主要是针对潜在供应商提供的材料/标准件的产品,在其通过产品合格鉴定试验后,对其工程能力、质量和适航管理能力以及特种工艺控制能力进行现场检查和评估,提出改进建议,通过持续改进使其产品列入民用飞机研制的合格产品目录(QPL,Qualified Product List)。     

有位移约束结构的可靠性分析

本文从增量载荷法的原理出发，对于具有位移约束的结构体系，通过引入“广义元”的概念，提出了计算其刚度破坏承载能力的方法，使结构体系的可靠性分析范围扩展到强度和刚度要求并存的情况，物理概念清楚，方法有效，通过算例阐述了该方法的应用。