CAJ | 학술논문

地球静止轨道甚高分辨率成像系统利用薄膜衍射成像可实现对地1m分辨率。成像系统中的索杆铰接式伸展臂尺寸较长、变形精度要求高，主镜尺寸较大、厚度较薄，系统成像质量对镜面变形要求高，使得伸展臂和主镜的热控成为系统热设计的难点。在调研国内外可展开式遮光罩技术和大口径薄膜镜面热控技术的基础上，对地球静止轨道甚高分辨率成像系统的伸展臂和主镜进行了初步热分析，给出了系统热控方案。分析了可展开式圆锥形遮光罩在四种极端工况下的温度分布，确定了热控方案的可行性。
지구정지궤도심고분변솔성상계통이용박막연사성상가실현대지1m분변솔。성상계통중적색간교접식신전비척촌교장、변형정도요구고，주경척촌교대、후도교박，계통성상질량대경면변형요구고，사득신전비화주경적열공성위계통열설계적난점。재조연국내외가전개식차광조기술화대구경박막경면열공기술적기출상，대지구정지궤도심고분변솔성상계통적신전비화주경진행료초보열분석，급출료계통열공방안。분석료가전개식원추형차광조재사충겁단공황하적온도분포，학정료열공방안적가행성。
Ultrahigh resolution imaging system on geosynchronous orbit can get earth image with 1 m resolution, using diffractive membrane optics. Cable-Strut Deployable Articulated Mast in this imaging system is about 100 m long, and was tightly required for its deformation. The diameter of primary mirror is about 20 m, and its thickness is only a few micrometers. To meet the optical performance objectives, the distortion of the primary mirror need to be minimized. So the thermal control system for Deployable Mast and primary mirror becomes a tremendous challenge. Based on the survey results about deployable baffle and primary mirror with large-scale membrane, ultrahigh resolution imaging system was thermally analyzed, and thermal control scheme was designed. The temperature distributions of deployable conical baffle in four extreme working conditions were provided, and the simulation results show the feasibility of the designed thermal control scheme.