向月飞行轨道误差分析

根据月球探测器向月飞行轨道动力学方程式得到了飞行轨道误差的迭代方程,采用协方差分析方法对轨道初始误差误差源造成的轨道误差进行了分析,结合具体算例,给出了探测器初始轨道位置和速度误差引起的向月飞行轨道误差的时间历程和轨道终点误差。计算结果表明,若发射环月卫星,必须进行多次中途轨道修正。

Error Analysis of Flight Trajectory to the Moon

The iterative equation on flight trajectory error is derived from the dynamics equation on flight trajectory of lunar explorer.The covariance analysis method is used to analyze the trajectory error induced by orbit initial error etc.Based on concrete example,the time period error and trajectory terminal error of flight trajectory to the Moon induced by initial trajectory position and velocity error of the explorer are calculated.The computing result indicates that multiple midway trajectory correction should be done while a circumlunar satellite is being launched.