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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。
It is very important to track the reentry vehicle and obtain the accurate estimate of the target trajectory. The ballistic trajectory of the reentry vehicle can be described by a more accurate dynamic model and the trajectory of the target can be estimated by UKF and compared with the result of 3RR. The simulation results show that the accuracy of ballistic estimation based on BRV-Exp model is better than that of 3RR method for ballistic reentry vehicle and the estimation accuracy of MRV-Wiener model is only slightly better than that of 3RR method The ballistic estimation accuracy.