小卫星全被动热设计及其验证技术

结合实例对全被动热控设计的小卫星热控特点进行分析。热相对稳定及整星良好的等温化是实现全被动热控设计的有利条件。对于全被动热控设计的小卫星,尤其应关注设计细节,如外露表面、工艺差异等影响。对重要参数或者变化的不确定参数进行敏感性分析有助于把握设计的适应性。针对具有复杂构型的航天器,提出了试验外热流量化分析方法,解决了地面热试验时外热流模拟困难的问题,可避免地面试验外热流设计的盲目性。

Complete Passive Thermal Design and Its Verification for Small Satellite

The main thermal characteristic for mini-satellite with totally passive thermal control is summarized. Comparative steady equipment heat dissipation and orbital heat flux is essential. Isothermal design is also important. As for this type small-satellite, great attention should be paid to certain details such as the equipment installed outside the satellite whose surfaces are uncovered with multi-layer insulation, the workmanship difference etc. To understand the design adaptability a sensitive analysis is recommended to apply for essential and uncertain parameters which may have impaction on thermal system. Sun simulator and orbital feat flux simulator during ground thermal test is necessary. A creative method proposed in this parer can he applied to avoid redundance test.