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摘要:
针对空间光学遥感器在空间环境地面模拟试验中舱板温度分布不均的问题，运用模块化思想对某型号空间光学遥感器工装的舱板结构开展了优化设计。将舱板按照温度分布进行分块，提出模块化拼装和模块化热控2种设计方案，模块化拼装是对舱板及其表面加热片进行独立分块划分，模块化热控则是将舱板视为整体，仅对其表面的加热片进行分块设计。结果表明：模块化热控的舱板平均温度偏差为0.205 K，低于未模块化设计的0.87 K和模块化拼装的0.30 K，提高了舱板的温度均匀性。同时，模块化拼装改善了舱板温度分布，使得符合热控要求的测点比例由34.8%提高到96.7%，但独立划分的模块之间仍存在一定温差；模块化热控则消除了模块间的温差，将符合热控要求的测点比例进一步提高到100%，完全满足热控要求。
Abstract:To solve the problem of uneven temperature distribution in the ground simulation experiment of space environment by space optical remote sensor, the modular design is used to optimize the cabin plate structure frock of a certain space optical remote sensor, and the cabin plates are divided according to the temperature distribution. In this paper, modular assembly and modular thermal control are proposed. The modular assembly is to divide the cabin plates and its surface heating sheets independently; the modular thermal control considers the cabin plates as a whole, and only the heating sheets are divided. The results show that the average temperature deviation of the modular thermal control is 0.205 K, which is lower than 0.87 K of the unmodulated design and 0.30 K of the modular assembly, and improves the temperature uniformity of the cabin plates. Modular assembly improves the temperature distribution of the cabin plates, and the proportion of measuring points that meet the thermal control requirements is increased from 34.8% to 96.7%. However, there is still a certain temperature difference between the modules, and modular thermal control eliminates the temperature difference. The proportion of measuring points meeting the thermal control requirements is further increased to 100%, which fully meets the thermal control requirements.
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Key words:
- space optical remote sensor /
- frock /
- vacuum thermal test /
- radiation /
- modularization design
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图 4 未模块化设计的舱板温度分布
Figure 4. Temperature distribution of cabin plates without modularization design
图 6 模块化拼装的舱板温度分布
Figure 6. Temperature distribution of cabin plates adopting modularization assembly
图 7 模块化热控的舱板温度分布
Figure 7. Temperature distribution of cabin plates adopting modularization thermal control
表 1 舱板参数
Table 1. Parameters of cabin plates
舱板 长×宽×厚/(mm×mm×mm) 热控要求/K 发射率 内壁 外壁 +X 1624×1500×5 308.15 0.10 0.65 -X 303.15 0.10 0.90 +Y 1500×780×5 298.15 0.03 0.65 -Y 303.15 0.90 0.90 +Z 1624×780×5 298.15 0.03 0.65 -Z 303.15 0.03 0.65 
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表 2 不同网格数下舱板的热流密度
Table 2. Heat flux of cabin plates at various grid numbers
舱板 面积/m2 热流密度/(W·m-2) 54万网格 138万网格 667万网格 +X 2.436 324.7 326.9 326.3 -X 2.320 245.9 247.6 248.6 +Y 1.135 193.6 192 190.8 -Y 1.170 390.3 392.5 393.4 +Z 0.682 287.6 285 286.1 -Z 1.165 241 239.9 238.6
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表 3 舱板温度统计结果
Table 3. Statistical results of cabin plate temperatures
舱板 平均温度偏差/K 标准温度偏差/K 试验 模块化拼装 模块化热控 试验 模块化拼装 模块化热控 +X 0.039 0.003 0.002 0.156 0.013 0.010 -X 0.795 0.253 0.223 1.172 0.309 0.227 +Y 0.391 0.618 0.269 0.637 0.693 0.295 -Y 1.310 0.265 0.216 2.265 0.316 0.217 +Z 1.309 0.260 0.246 2.052 0.268 0.255 -Z 1.277 0.251 0.235 1.815 0.307 0.247 总体 0.873 0.299 0.205 1.466 0.381 0.226
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