用高精度近距离摄像度测量卫星天线表面形状的热变形测量
Kaifeng Ma1, Guiping Huang1, Junzhen Meng1
1College of Surveying and Geo-Informatics, North China University of Water Resources and Electric Power, Zhengzhou 450046, China.
Sensors (Basel, Switzerland)
|July 27, 2024
概括
一种新的摄影计量技术精确地测量了卫星天线的大小和热变形. 这种方法确保了天线在轨道上的性能,显示形状准确性在-60°C下降,但仍然符合设计标准.
科学领域:
- 航空航天工程 航空航天工程
- 计量学 计量学 计量学
- 材料科学 材料科学 材料科学
背景情况:
- 卫星天线需要精确的表面形状和尺寸精度以获得最佳性能.
- 空间中的热变化可以诱导显著的表面变形,影响天线的功能.
- 现有的测量技术可能缺乏评估这些变形所需的准确性.
研究的目的:
- 引入和验证用于卫星天线计量学的高精度近距离光谱技术.
- 在不同的温度条件下评估卫星天线表面形状的热变形.
- 评估卫星天线的轨道性能和准确性,使用已开发的光谱法.
主要方法:
- 开发和研究一种新的高精度近距离光谱测量原理和解决方案.
- 实施用于热变形分析的详细测量测试方案.
- 应用光度计技术来测量卫星天线尺寸和表面形状的精度.
主要成果:
- 近距离光谱技术的测量误差小于0.04毫米,满足了严格的准确性要求.
- 发现卫星天线表面形状和肋骨精度随着温度的下降而恶化,精度最低在-60°C (RMSE高达0.878mm和0.761mm).
- 该天线符合表面形状精度 (RMSE ≤1mm) 和在40°C和80°C的温度差异下表面形状变形的技术设计指数 (RMSEs为0.216mm和0.411mm,满足≤0.3mm和≤0.5mm的要求).
结论:
- 新型高精度近距离光谱是卫星天线计量学的可靠方法,包括热变形评估.
- 温度显著影响卫星天线的表面精度,需要在设计和操作中考虑.
- 开发的技术成功验证了卫星天线在热应力下满足关键性能和设计规格.
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