论文部分内容阅读
减少乘员和载荷的LEO(低地球轨道)运载成本,是研制继“阿里安”5后的下一代空间运输系统的主要目标.如果整修费不太昂贵,那末最理想的方案是研制可回收运载工具.可回收系统由于需将额外的重量带进轨道用于再入,故其不确定性比一次性使用运载工具大.有效载荷只占总重的很小一部分,将增加不确定性.据此,CNES(法国全国空间研究中心)已开始调整对运载工具及其推进的基本研究.法国宇航公司对水平和垂直起飞、单级和两级结构,以及各种推进方式的各种可重复运载工具方案作了比较研究.AMD-BA对其他系统的研究旨在通过一项保守的计划,用已有的证明有效的数据建立数据库,通过参量研究评定各方案对技术的敏感性.SNECMA(法国国营飞机发动机研究制造公司)、SEP(欧洲动力装备公司)和ONERA(法国全国航空空间研究局)研究了各种组合发动机,以选出一种更理想的航天飞机推进系统.
Reducing LEO (Low Earth Orbit) carry-over costs for crew and payloads is the main goal of developing the next generation of space transportation systems following the “Arian” 5. If the renovation costs are less expensive then the ideal solution is to develop a reusable delivery Tools. Recyclable systems are more uncertain than single-use vehicles due to the need to bring extra weight into orbit for re-entry. The payload adds up to a small fraction of the total weight and adds uncertainty. As a result, CNES (National Center for Space Studies of France) has begun to restructure the basic research on delivery vehicles and their propulsion, and the French Aeronautic and Aerospace Company’s various reusable vehicles for horizontal and vertical take-off, single-stage and two-stage structures and various modes of propulsion A comparative study of the tools was carried out.The study of AMD-BA on other systems aims to establish a database with proven data and to evaluate the sensitivity of each protocol to technology through a conservative plan.SNECMA (France State Aircraft Engine Research and Manufacturing Company), SEP (European Power Equipment Company) and ONERA (National Aeronautics and Space Administration of France) studied various combinations of engines to select a more desirable Space Shuttle propulsion system.