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由于惯性器件存在漂移,很难进一步提高采用惯性设备提供水平基准来实现星敏感器自主导航精度;而由于大气模型不精确,很难进一步提高利用星光折射来实现星敏感器自主导航的精度。为此,本文提出根据星敏感器的识别结果以及激光水平测量部件分别测量星敏感器的两个像平面轴来实现星敏感器自主导航。外场实验结果表明:采用本文的方法来实现星敏感器自主导航不仅能为载体提供角秒级精度的三轴姿态,而且能为载体提供角秒级的载体经度和纬度,所以该系统为载体提供了高精度的导航信息。
Due to the drift of inertial devices, it is difficult to further improve the accuracy of satellite sensor autonomous navigation by using inertial devices to provide horizontal reference. However, it is difficult to further improve the accuracy of star sensor autonomous navigation due to inaccurate atmospheric models. For this reason, this paper proposes that the satellite sensor autonomous navigation be realized based on the recognition result of the star sensor and the laser level measurement component separately measuring two image plane axes of the star sensor. The experimental results show that using this method to realize satellite sensor autonomous navigation can not only provide angular accuracy of three-axis attitude for the carrier, but also provide angular and second-long carrier longitude and latitude for the carrier, so the system provides carrier High-precision navigation information.