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关于单轴姿态确定的一般方法和精度分析,国外已有不少文献论及,但无论哪种姿态确定方法都有不可避免的奇点存在。在这些奇点附近确定姿态精度差,没有实用价值。为了获得较好的姿测效果,人们只得精心选择发射卫星的日期和时刻,使得姿测期间避开这些奇点。为了克服这一困难,本文提出了冗余量测的概念。使用冗余量测信息模型确定姿态,改善了通常方法的奇点分布,提高了姿测精度,扩大了发射窗口。
There are many literatures about the general method and accuracy analysis of single-axis attitude determination. However, there are inevitable singularities in any method of attitude determination. Determining attitude accuracy near these singularities is of no practical value. In order to get a better attitude, people have to carefully select the date and time of launching the satellite so that these singularities are avoided during the attitude measurement. In order to overcome this difficulty, this paper proposes the concept of redundancy measurement. The redundant measurement information model is used to determine the pose, which improves the singularity distribution of the general method, improves the attitude accuracy and enlarges the launch window.