温度干扰对空间惯性传感器的影响
Jia Hao1, Fulong Wei2, Xingyu Yan2
1School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Sensors (Basel, Switzerland)
|November 9, 2024
概括
温度波动对中国天计划的惯性传感器产生重大影响,导致加速噪声. 这项研究量化了这种噪音,揭示了它远远超过了任务目标,需要改进的热控制解决方案.
科学领域:
- 太空物理空间物理学
- 引力波检测引力波探测器
- 传感器技术 传感器技术
背景情况:
- 天计划的目标是探测太空中的引力波.
- 惯性传感器至关重要,但对温度波动敏感.
- 温度干扰对加速度测量的影响尚不清楚.
研究的目的:
- 为天计划全面分析温度干扰对加速度测量的影响.
- 开发一个用于计算温度波动引起的加速度噪声水平的方案.
- 为了确定温度引起的加速噪声的主要来源.
主要方法:
- 开发了一种基于热管温度控制方案的系统传热模拟模型.
- 从模拟模型中获得的温度信号.
- 将温度信号转换为频率域,以计算加速噪声水平.
主要成果:
- 确定了排气,辐射计和辐射压力效应作为加速噪声的主要贡献者.
- 在1mHz时计算出总噪声峰值为3.6×10-12m/s2·Hz1/2).
- 这种噪音水平比天津的目标高出三倍以上.
结论:
- 0.13 K/Hz1/2@1 mHz的温度控制不足以满足天的加速噪声要求.
- 显著的噪音贡献来自热效应,如排气和辐射压力.
- 这些发现凸显了天任务需要先进的热管理和错误评估策略的需要.
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