编队卫星空间状态与星间基线的建模与分析

针对编队卫星任务中起重要作用的星间基线指标,在考虑精度需求的基础上对用于确定星间基线的空间状态量进行了选择,建立了空间状态量与星间基线的关联数学模型,提供了误差分析方法,仿真给出了一定场景设置下的精度影响因子等指标以定量刻画二者之间的误差传播关系。基线长度仅与编队卫星的相对空间状态有关,而基线姿态角还与主星的绝对姿态有关;且由卫星空间状态得到星间基线的过程中误差放大。

Modeling and Analysis of Spatial States and Inter-Satellite Baseline in Formation Flying Missions

The inter-satellite baseline plays a vital role in the formation flight satellites missions.The appropriate spatial states were chosen to determine the inter-satellite baseline based on the precision requirements.A mathematical model was established to associate the spatial states and the inter-satellite baseline.An error analysis method was also presented.Simulations in certain scenarios were carried out.The index such as the precision influence factor was calculated to depict the propagation relations between the two kinds of parameters.The baseline length was only correlated with the relative spatial states of the formation flight satellites,while the baseline angles were also correlated with the absolute attitude of the master satellite.The errors were amplified during the propagation from the satellite spatial states to the inter-satellite baseline.