唐宗斌, 王建平, 廖星. 高精度光学载荷安装平台热控设计及试验验证[J]. 航天器环境工程, 2023, 40(6): 581-586 DOI: 10.12126/see.2023054
引用本文: 唐宗斌, 王建平, 廖星. 高精度光学载荷安装平台热控设计及试验验证[J]. 航天器环境工程, 2023, 40(6): 581-586 DOI: 10.12126/see.2023054
TANG Z B, WANG J P, LIAO X. Thermal control design and test verification of high-precision optical payload assembly platform[J]. Spacecraft Environment Engineering, 2023, 40(6): 581-586. DOI: 10.12126/see.2023054
Citation: TANG Z B, WANG J P, LIAO X. Thermal control design and test verification of high-precision optical payload assembly platform[J]. Spacecraft Environment Engineering, 2023, 40(6): 581-586. DOI: 10.12126/see.2023054

高精度光学载荷安装平台热控设计及试验验证

Thermal control design and test verification of high-precision optical payload assembly platform

  • 摘要: 某科学卫星的3台光学主载荷需实现对太阳共视,要求3台载荷的光轴平行度偏差小于30ʺ,考虑到热弹变形的影响,光学载荷安装平台温度须控制在(22±5) ℃。然而,载荷安装平台尺寸大(1.6 m×1.6 m×0.8 m)且处于舱外,外热流各方向相差大,温度均匀性控制难,故对该平台采取主动热控(PI闭环加热)和被动热控(多层隔热)相结合的热控措施。软件仿真显示,此热控方案下,载荷安装板及支撑杆温度可以控制在(22±3) ℃;整星真空热试验显示,此热控方案下,载荷安装板温度可以控制在(22±2) ℃,载荷支撑杆温度可以控制在(22±3) ℃:以上均验证了热控方案可行、有效。

     

    Abstract: The three main optical payloads of a scientific satellite need to achieve parallel view with the sun, which requires the parallelism deviation of their optical axes to be less than 30ʺ. Considering the influence from thermal elastic deformation, the temperature of the optical payload assembly platform needs to be controlled at (22±5) ℃. However, the payload assembly platform is large in size (1.6 m×1.6 m×0.8 m) and is located outside the cabin, resulting in great differences of heat fluxes in various directions and difficulties in temperature uniformity control. Therefore, combined thermal control measures of active PI closed-loop heating together with passive multi-layer insulation were implemented on the platform. Under the proposed thermal control scheme, software simulation shows that the temperature of the payload mounting plate and the support rod can be controlled at (22±3) ℃. Satellite vacuum thermal test indicates that the temperature of the payload mounting plate and the support rod can be controlled at (22±2) ℃ and (22±3) ℃, respectively. All the above have verified that the proposed thermal control scheme is feasible and effective.

     

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