Thermal Control Design Conception of the Amazonia-1 Satellite

ABSTRACT: Amazonia-1 is a Brazilian remote sensing satellite providing mainly images, in order to observe and monitor deforestation, especially in the Amazon region. This paper describes the thermal control design, which uses passive and active concepts. The active thermal control is based on heaters regulated by software via thermistors. The passive thermal control consists of multi-layer insulation blankets and radiators, paints, surface finishes to maintain temperature level of the overall carrier components within an acceptable value. The thermal control design is supported by thermal analysis using thermal mathematical model. The temperatures and heater power are predicted for critical cases.

摘要：Amazonia-1是巴西遥感卫星，主要提供遥感影像，用于观测并监测森林砍伐活动，尤其聚焦亚马逊区域。本文阐述了该卫星采用被动与主动结合方案的热控设计：主动热控系统以通过热敏电阻（thermistors）由软件调控的加热器为核心；被动热控系统由多层隔热毯（multi-layer insulation blankets）、散热器、涂料及表面处理工艺构成，用于将整星各组件的温度维持在可接受范围内。该热控设计依托热数学模型（thermal mathematical model）开展热分析以提供支撑，并针对关键工况完成了温度与加热器功率的预测。