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首页> 外文会议>Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments >Multipurpose Cassegrain System
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Multipurpose Cassegrain System

机译：多用途卡塞格伦系统

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Ejecta and dust caused during lander plume interactions with the regolith can harm the crew, equipment, and lander. Stabilizing the large landing surface areas required for human-scale missions suggests the use of indigenous resources rather than hauling construction materials from Earth. Solar power offers the largest most prevalent energy source on the Lunar surface, which could be focused by a Cassegrain solar concentrator for sintering lunar regolith into a hardened contiguous stabilized surface. Our Cassegrain solar concentrator design can serve multiple functions across several mission phases including during Lunar nights. The multiple role applications considered for Cassegrain concentrators are (1) solar sintering for pads, aisles, and berms; (2) harvesting gaseous molecules: H_2O, O_2, H_2, and He-3; (3) space antenna for telemetry and telecommunication during nominal operations; and (4) space telescope with 20-m aperture during darkness. A key emphasis is placed on the NASA Langley-developed boron nitride nanotube (BNNT) nanocomposite technology which is ideal for the segmented primary mirror structure of the Cassegrain system because it promises a very low coefficient of thermal expansion and negligible Poisson ratio. Also, BNNT nanocomposites offer great benefits, such as light weight, radiation shielding capability, and mechanical strength for structural applications. We envision a directed Research and Development project with participation by some industry partners.
机译：着陆器羽流与表土相互作用时产生的喷射物和灰尘可能会伤害机组人员、设备和着陆器。稳定人类规模任务所需的大着陆面积意味着使用本土资源，而不是从地球上运输建筑材料。太阳能为月球表面提供了最大、最普遍的能源，卡塞格伦太阳能聚光器可以将其聚焦，将月球表土烧结成硬化的连续稳定表面。我们的卡塞格伦太阳能聚光器设计可以在多个任务阶段提供多种功能，包括在月球夜晚。卡塞格伦选矿厂考虑的多功能应用包括：（1）用于衬垫、过道和护道的太阳能烧结；（2） 获取气体分子：H_2O、O_2、H_2和He-3；（3） 标称运行期间用于遥测和电信的空间天线；（4）黑暗中孔径为20米的太空望远镜。重点放在NASA Langley开发的氮化硼纳米管（BNNT）纳米复合技术上，该技术非常适合卡塞格伦系统的分段主镜结构，因为它保证了非常低的热膨胀系数和可忽略的泊松比。此外，BNNT纳米复合材料具有重量轻、辐射屏蔽能力强、结构应用机械强度高等优点。我们设想一个由一些行业合作伙伴参与的定向研发项目。

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