马可尼空间系统有限公司进行了一项研究工作,这项工作的中心任务是,对照航天器的某一重量范围,把一些不同的地球同步卫星推进系统,就重量,性能和成本等方面进行了比较。这项研究工作包括,就动力和提示的要求以及比推力、最小脉冲冲量、推力量级和推进剂等发动机的特性的影响,对现有的推进系统实物进行概括研究,也就是对系统的状况和效果进行评审。为了确保这项研究工作中所作的假设符合实际,把研究结果(本文介绍了其中一些结果)与得到详细特性数据的现行航天器推进系统的特性作了比较。为了确定这些可能选用的推进系统的成本效益和质量效益。并确定其有效载荷与推进重量之比,分析了这项研究工作的结果。除此之外。通过这项研究发现,先进的推进系统比普通推进系统在性能和成本方面都有明显的改善。这两方面的改善是由于研制了诸如电动泵和以单组元肼和四氧化二氮为推进剂的双组元火箭发动机等新组件而取得的。 A research project was undertaken by Marconi Space Systems Ltd., whose central task was to push a number of different geostationary satellites into the system, in terms of weight, performance and cost, over a range of spacecraft weights A This research effort included a thorough study of existing propulsion systems in nature with respect to motivation and cues as well as the effects of specific thrust, minimum impulse, thrust magnitude, and engine characteristics such as propellants, that is, on the condition of the system And the effectiveness of the review. To ensure that the assumptions made in this research work are realistic, the results of the study (some of which are presented in this paper) are compared with those of existing spacecraft propulsion systems that have detailed characterization data. To determine the cost-effectiveness and quality benefits of these possible propulsion systems. And determine the ratio of its payload to propulsion weight, the result of this research is analyzed. In addition. Through this study, it is found that advanced propulsion system has obvious improvement in performance and cost over ordinary propulsion system. These two improvements have resulted from the development of new components such as electric pumps and two-component rocket motors based on monohydrazine and nitrogen tetrafluoride propellants.