一种适用于星间测距网的抗差方案设计

Design of A Scheme of Robust Estimation Applied on Net of Inter-Satellite Measurement

主要讨论了利用星间测距进行星座自主导航的导航算法设计,考虑系统的自主性,算法必须具有检测错误节点和抵抗粗差的能力。为此,文章通过分析星间测距网的特殊性,提出一种以抗差最小二乘为基础,适用于星间测距网的抗差方案。根据失效节点和观测粗差对残差影响的差异,提出分步处理的方法。通过算例比较几种常见抗差方案,验证了文中设计的抗差方案的有效性。

Navigation algorithm for constellation autonomous navigation using inter-satellite measurement is discussed. Considering the characteristic of autonomous system, the algorithm must be provided with ability to check fault points and resist gross errors. Therefore, a scheme of robust estimation based on robust least square estimation and applied on net of inter-satellite measurement is designed in this paper by analyzing the characteristic of net of inter-satellite measurement. According on the difference of influence imposed on residual by fault points and gross errors of observation, the method of processing step by step is put forward. Compared several general schemes of robust estimation by examples, the result shows that the scheme of robust estimation designed in this paper is effective.