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首页> 外文会议>Space Technology amp; Applications International Forum (STAIF-99) ptol January 31-February 4, 1999, Albuquerque Hyatt Hotel, NM >A quick look at the expected thermal environment extremens for SBR LEO concepts
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A quick look at the expected thermal environment extremens for SBR LEO concepts

机译：快速查看SBR LEO概念的预期热环境极限

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摘要

The management and sitribution of thermal energy is a critical asspect of any statellite design. Incorporation of thermal management concepts early in the system concept development is necessary in order to avoid costly redesigns as the system matures. This paper looks at the expected thermal extremes (full sun and eclipse) for a typical SBR LEO concept with a large planar phased array antenna in order to bound and begin definition of applicable thermal managment concepts for these designs. The approach involves application of the energy equation (radiation only) using typical ranges of absorptivity and emissivity for spacecraft materials in order to determine the resulting antenna temperatures (steady state). Radiated poser (RF) and oser concersion efficienies (input to RF) were also varied. The results show that the antennas are good thermal radiators as expected, and that the issue with thrmal managment on the antenna will not necessarily be cooling the antenna electronics but keeping them warm enough to operate, especially in power off conditions. Recommended approaches for addressing these issues are presented in order to initiate inclusion of these preliminary concepts in the design and research process as SBR and related antenna concepts mature.
机译：热能的管理和分配是任何卫星设计的关键方面。为了避免随着系统的成熟而进行昂贵的重新设计，必须在系统概念开发过程中尽早纳入热管理概念。本文着眼于典型SBR LEO概念与大型平面相控阵天线的预期极端温度（全日照和日食），以约束并开始定义这些设计的适用热管理概念。该方法包括使用航天器材料的吸收率和发射率的典型范围来应用能量方程式（仅辐射），以确定最终的天线温度（稳态）。辐射波塞（RF）和振荡对流效率（RF的输入）也有所不同。结果表明，天线符合预期，是良好的散热体，对天线进行严格管理的问题不一定会冷却天线电子器件，而是要使其保持足够的温暖以进行操作，尤其是在断电情况下。提出了解决这些问题的推荐方法，以便随着SBR和相关天线概念的成熟，将这些初步概念纳入设计和研究过程。

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