北京三号A卫星自主任务规划地影快速预报方法  

Fast Prediction Method for Earth Shadow in Autonomous Mission Planning of BJ-3A Satellite

作　　者：陈雄姿[1] 谢松[1] 张磊 付凯林 于灵慧[1] CHEN Xiongzi;XIE Song;ZHANG Lei;FU Kailin;YU Linghui(DFH Satellite Co.,Ltd.,Beijing 100094,China)

机构地区：[1]航天东方红卫星有限公司,北京100094

出　　处：《航天器工程》2023年第3期32-37,共6页Spacecraft Engineering

摘　　要：星上自主任务规划是北京三号A卫星的一项创新性技术,显著提升了卫星的好用、易用性和智能化水平。为了满足自主任务规划的高实时性要求,文章提出了一种卫星进/出地影时刻的快速预报方法。首先,基于太阳-地球-卫星的相对位置关系,建立了每个轨道圈内卫星进/出地影时刻的解析估算模型和进/出地影时刻卫星满足的非线性方程;然后,基于获得的进/出地影时刻的估计值,使用对分法迭代求解非线性方程,获得进影和出影时刻的精确结果。仿真结果表明:在星载处理器上使用该方法预报一天的地影时间耗时约1.1 s,计算速度比现有星上预报算法提升了约100倍,具有较高工程应用价值。On-board autonomous mission planning is an innovative technology in BJ-3A satellite,which significantly improves its usability,ease of use,and intelligence level.In order to meet the high real-time requirements of autonomous mission planning,a fast on-board prediction method for shadow boundary time is proposed.Firstly,based on the relative position relationship between the sun,earth and satellite,an analytical estimation model for the time when satellites enter and exit the earth shadow in each orbit circle is established,as well as a nonlinear equation satisfied by the satellites at the time of entering and exiting the earth shadow in each satellite orbit;Then,based on the estimated values of the entry and exit time of the shadow,the nonlinear equation is solved using the bisection method to obtain accurate results of the entry and exit time.The simulation results show that using the proposed method to predict a day’s shadow time on the on-board processor takes about 1.1 seconds,and the calculation speed is improved by about 100 times compared to the existing on-board prediction algorithm.Therefore,it has high engineering application value.

关 键 词：北京三号A卫星 自主任务规划 地影预报 圆柱阴影模型 对分法 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]