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首页> 外文期刊>Journal of Spacecraft and Rockets >Parametric Scaling Model for Nongeosynchronous Communications Satellites
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Parametric Scaling Model for Nongeosynchronous Communications Satellites

机译：非地球同步通信卫星的参数缩放模型

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摘要

A parametric model for nongeosynchronous orbit communications spacecraft was developed in this Note using data obtained from FCC filings. Trade studies during conceptual design depend fundamentally on such scaling models. Intermediate parameters like mass, power, and volume directly influence performance and cost. The presented scaling model can predict wet mass for nongeosynchronous communications satellites with an average error of 1.6%, which represents an improvement over previous models. There is some limitation to the accuracy of the scaling law as a result of the conceptual nature of the underlying FCC data. We note that the actual wet mass of an Iridium satellite is 689 kg, including 115 kg of propellant, both more than twice the figure in Iridium's original FCC filing. Using our equation, the wet mass estimate at the filing date would have been 467 kg (vs the 340.7 kg given in the FCC filing). The estimate for the deployed spacecraft is 725.8 kg. Although estimates will fluctuate as a result of scope and design changes between the proposal stage and actual deployment, the inclusion of propellant mass in the equation derived for spacecraft wet mass allows changes to the design lifetime and design altitude to be explicitly taken into account.
机译：本说明中使用从FCC备案文件中获得的数据，开发了非地球同步轨道通信航天器的参数模型。概念设计期间的贸易研究从根本上取决于这种缩放模型。质量，功率和体积等中间参数直接影响性能和成本。提出的缩放模型可以预测非对地同步通信卫星的湿质量，平均误差为1.6％，这是对先前模型的改进。由于基础FCC数据的概念性质，缩放定律的准确性存在一些限制。我们注意到，铱星的实际湿重为689千克，其中包括115千克推进剂，两者均是铱星原始FCC档案中数字的两倍以上。使用我们的公式，申请日的湿重估计为467千克（而FCC申请中给出的340.7千克）。部署的航天器的估计重量为725.8千克。尽管估算范围会因提议阶段和实际部署之间的范围和设计变更而有所波动，但在为航天器湿质量推导的方程式中包含推进剂质量，可以明确考虑设计寿命和设计高度的变化。

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