外测弹道截断误差修正方法

由于运载火箭飞行过程的复杂性,特别是多级发动机点火与多次关机的影响,采用曲线拟合平滑微分方法计算弹道参数不可避免地会有截断误差,对于位置和速度变化剧烈的弹道段,更是存在较大的截断误差。为能正确反映目标飞行轨迹,得到精确的弹道参数,必须对其进行修正。结合航天靶场外测数据处理工作的实际,构建了一组适用于不同情况的截断误差修正算法,并利用实测数据仿真分析了本文方法的有效性和可行性。

Research on Algorithm for Truncation Error of Exterior Measured trajectory

Due to the complexity of launch vehicle flight,especially that in the ignition and shutdown phases of stage-boosters,the truncation error is inevitable while trajectory parameters are determine by curve fitting method and is even higher in those trajectory segment with sharp changes in both its positions and velocities.Correction have to be performed to obtain a more precise trajectory with more accurate ballistic parameters.Based on the practical condition of space ranges where exterior ballistic measurement is implemented,An algorithm to correct the truncation errors under different circumstances is proposed,with both its effectiveness and feasibility analyzed by observed data.