基于动力学模型的再入弹道估计方法研究

对再入飞行器进行跟踪,获取目标弹道的精确估计具有十分重要的现实意义。飞行器在再入段的弹道可用较为精确的动力学模型描述,并利用UKF对目标的弹道进行估计,与3RR.几何法解算结果进行比对。仿真结果表明,对于弹道式再入飞行器,基于BRV-Exp模型的弹道估计精度比3RR.法具有明显改善;对于机动式再入飞行器,基于MRV-Wiener模型的估计精度只是略微优于3RR.法的弹道估计精度。

Research on Estimation of Reentry Trajectory Based on Dynamical Model

It is extremely significant to track reentry spacecraft and get precise estimation of their trajectory in the reentry phase.During atmospheric reentry phase,the locus of spacecraft can be described approximately by a dynamical model.The paper first uses UKF to estimate the trajectory of reentry targets and then compares the result with solution of 3R method.The simulation result shows that UKF based on the dynamical model effectively improves trajectory estimation precision of reentry targets for a ballisti...