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大倾角近地圆轨道通信卫星外热流复杂多变,整星热耗大且对地面热流集中,因此其热控设计难度较大。本文以非箱式构型小卫星为对象,研究近地圆轨道通信卫星的热控技术。文中分析了大倾角近地圆轨道的外热流情况,各个舱板的外热流稳定性均较差,无法选取固定的散热面。本文提出了优化组合散热面并采用三维热管网络耦合散热面的热控技术,实现整星2200 W(对地面1500 W)的散热能力。文中利用热分析软件建立了整星的有限元模型,并对极端高低温工况进行了仿真分析,模拟结果表明上述热控技术可满足卫星散热需求。
The large-angle, near-Earth orbit communications satellite has a complex and variable external heat flux, large total heat dissipation and concentrated heat flow to the ground, making it difficult to design thermal control. In this paper, non-box configuration of small satellites for the object of the earth-orbital communications satellite thermal control technology. In this paper, the analysis of the external heat flow in a large orbit near-Earth orbit, the external heat flow stability of each panel are poor, can not select a fixed cooling surface. This paper presents a thermal control technology that optimizes the combination of heat dissipation surfaces and uses a three-dimensional heat pipe network to couple the heat dissipation surfaces so as to achieve an overall heat dissipation capacity of 2200 W (1500 W on the ground). In this paper, a finite element model of the whole star is established by using thermal analysis software, and the simulation of the extreme high and low temperature conditions is conducted. The simulation results show that the above thermal control technology can meet the satellite cooling requirements.