Thermal design and performance of HAMSAT
Thermal design and performance of HAMSAT
复制标题
HAMSAT 的热设计和性能
DOI：
10.1016/j.actaastro.2006.07.001
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
V. V. Reddy
中科院分区：
文献类型：
--
作者：
K. Narayana;V. V. Reddy
HAMSAT是一颗微型卫星，为国家和国际业余无线电操作员（ham）社区提供基于卫星的业余无线电服务。微型卫星（小于100公斤）越来越多地被用作轨道试验和研究的经济手段。自研制以来，微卫星的热控制对热工程师提出了独特的挑战；可用的功率和体积都非常有限。不管这些问题和卫星的极端环境和不断变化的功率条件（内部和外部），子系统仍然必须保持在规定的温度范围内。HAMSAT围绕垂直于轨道平面的轴旋转，并放置在632×621km高度的太阳同步轨道上。在航天器上试验的三种新技术是锂离子电池、总线管理单元和近地轨道多结砷化镓太阳能电池。一个没有加热器的纯被动热控制系统被用来控制航天器的温度。提出并讨论了热设计和在轨温度特性。该航天器已经在轨道上运行了一年。航天器在轨热性能良好，与预测结果吻合较好。讨论了热参数变化对温度的影响。
HAMSAT is a micro-satellite for providing satellite-based Amateur Radio services to the national as well as the international community of Amateur Radio Operators (HAMs). Micro-satellites (less than 100kg) are becoming increasingly utilized as an economical means of experimentation and research in orbit. The thermal control of micro-satellite presents unique challenges to the thermal engineer since the mass; power and volume available are all very limited. Regardless of these problems and the extreme environments and changing power conditions (internally and externally) of the satellites the subsystems must still be maintained within the specified temperature limits. HAMSAT spins about an axis perpendicular to orbital plane and is placed in 632×621km altitude sun-synchronous orbit. The three new technologies experimented in the spacecraft are lithium-ion batteries, Bus Management Unit and multi junction gallium arsenide solar cells in LEO orbit. A purely passive thermal control system without heaters is used to control the temperature of the spacecraft. Thermal design and on-orbit temperature characteristics are presented and discussed. The spacecraft has completed one year of operation on orbit. The on orbit thermal performance of the spacecraft is good and matches well with the prediction. Impact of variation in thermal parameters on temperature is discussed.