一种提高姿态测量精度的新途径--冗余量测法
A New Approach to Improving the Accuracy of Attitude Determination--A Redundant Measurement Model Method
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摘要: 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[1]，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.Abstract: The usual methods for attitude determination of spinning satellite have been mentioned in many papers published abroad[1]. The common disadvantage of these methods is the existence of many singular points at which the determination of attitude accuracy differences is of no practical value. Date and time. for the, launch of the settelite have to be selected meticulously so as to get better attitude determination results. In order to overcome this disadvantage, the concept of redundant measurement model is presented in this paper. Because of the application of the redun4ant measurements models for attitude determination, singular point distributions in 'the usual methods have been improved, the accuracy is higher and the launch window has been expanded.
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