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基于星球追踪器的卫星扩展的精确态度测量技术的研究
Peng Sang1,2, Wenbo Liu1,2, Yang Cao2
1School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China.
Sensors (Basel, Switzerland)
|October 26, 2024
概括
一个新的小型恒星追踪器精确地测量了卫星爆发态度. 这种低功耗设备可用于太空科学任务的准确态度确定,提高有效载荷数据质量.
科学领域:
- 太空飞船工程 太空飞船工程
- 态度的确定和控制系统.
- 天体动力学是指天体动力学.
背景情况:
- 太空科学任务经常使用延伸弹头来部署磁力计等有效载荷.
- 准确地测量这些弹的位置,对于任务的成功和数据完整性至关重要.
- 现有的倾向测量系统可能面临尺寸,功耗或准确度的限制.
研究的目的:
- 开发和验证一个小型化的,低功耗的纳米恒星追踪器,用于精确地测量卫星延伸的态度.
- 评估纳米恒星追踪器在操作空间环境中的性能.
- 为了证明系统能够提高磁场向量测量的准确性.
主要方法:
- 使用CMOS图像传感器开发了一种自主设计的,小型化的,低功耗的纳米恒星追踪器.
- 集成商用镜头和自动校准技术用于数据校正.
- 在轨应用和测试SATech-01卫星的5米磁力计杆.
主要成果:
- 纳米恒星追踪器在重量为150g,功耗为0.85W的情况下,实现了约5弧秒的指向精度.
- 在轨道上的数据显示阴影区域的态度稳定 (30弧秒标准偏差).
- 由于环境因素,在阴影和阳光之间的过渡期间观察到±2°的最大角度波动.
结论:
- 开发的纳米恒星追踪器是一个可行的解决方案,用于精确地测量卫星延伸的态度.
- 该系统的性能符合任务要求,用于准确的态度确定.
- 获得的准确的态度数据可以显著提高磁场向量测量的质量.
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