太阳同步轨道星敏感器热设计典型工况确定

摘要

以某太阳同步轨道卫星星敏感器为例，阐述了热环境分析、外热流计算、典型工况条件确定以及热试验模拟的全过程。首先，分析了星敏感器所处的内、外部热环境，确定了其温度水平的主要影响因素。其次，进行了星敏感器通光孔到达外热流的计算，确定了典型工况的工况条件。然后，制定了星敏感器热平衡试验外热流的模拟方案，利用闭环程控系统进行外热流加载。最后，依据星敏感器自身特点，提出了热试验外热流的加载策略。典型工况条件的确定合理可行。%The whole process of thermal environment analysis,space heat flux calculation,typical work states analysis and heat flux simulation for thermal test is expatiated for a given star sensors working on sun-synchronous orbit.Firstly,the inner and outer thermal environments of the star sensors were analyzed,and the main influential fac-tors on temperature level were determined.Secondly,heat fluxes that reach the given star sensors were calculated,and the typical work state conditions were obtained.Thirdly,the space heat flux simulation scheme of heat balance test was determined,and closed loop programmable system was applied to load heat flux.Finally,the space heat flux simulation method and tactic of thermal test is proposed according to the characteristics of the star sensors.It proves that the typi-cal work states are rational and feasible.