Attitude Determination Algorithm Using Earth Sensor Images and Image Recognition
Attitude Determination Algorithm Using Earth Sensor Images and Image Recognition
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DOI：
10.2322/tjsass.64.82
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发表时间：
2021-01-01
影响因子：
1.1
通讯作者：
Matunaga, Saburo
中科院分区：
文献类型：
--
作者：
Kikuya, Yuhei;Iwasaki, Yohei;Matunaga, Saburo
介绍了一种利用地球敏感器确定微小/纳米卫星姿态的新算法。对于最近的微纳卫星，尽管其体积有限，但对姿态确定精度的要求越来越严格。由于地球传感器具有体积较小的优势，一些研究提出将其用作姿态传感器，但它们不能实现实时的全自动处理。因此，我们开发了一种有效地将几何考虑和图像识别技术相结合的算法，从而实现了高度的自治性、鲁棒性和实时处理。通过地面实验验证了该算法的有效性。该算法的工作频率为0.2赫兹，精度为0.1-1°，与粗太阳敏感器的精度相当。此外，它能够仅使用地球传感器和GNSS接收器来确定位置信息的三轴姿态。这项研究证明，微纳卫星姿态确定系统所需的总线设备可以减少，从而有助于增加设计自由度。
This paper describes a new algorithm to determine the attitude of micro-/nano-satellites using an Earth sensor. For recent micro-/nano-satellites, the requirements for attitude determination accuracy are becoming more stringent, despite its limited volume. Since Earth sensors have the advantage of smaller size, some studies have presented using them as attitude sensors; however, they could not achieve fully automatic processing in real-time. Therefore, we have developed an algorithm that effectively combines geometrical consideration and image recognition technology, thus realizing high autonomy, robustness, and real-time processing. The validity of this algorithm is confirmed through ground experiments. The algorithm operates at a rate of 0.2 Hz and achieves an accuracy of 0.1-1 deg, which is similar to the accuracy of a coarse sun sensor. Furthermore, it is capable of determining the three-axis attitude using only an Earth sensor and a GNSS receiver for position information. This study proves that the bus equipment required for attitude determination systems in micro-/nano-satellites can be reduced, thereby contributing to increased design freedom.