基于空间分层组合设计的火箭落点实时计算模型

为保证航天发射任务航区安全，实现火箭落点的高精度实时快速计算，提出一种基于空间分层的数学模型，对落点计算几何模型与动力学模型进行组合设计.该模型将弹道空间分层为自由段和再入段，自由段采用地球扁率修正的落点计算几何椭圆模型，而再入段采用考虑了空气阻力的动力学模型，并加入地球摄动及旋转等因素的修正.经与实际落点数据对比验证，该模型实现了精度和效率的最佳融合，能够满足航天发射任务火箭落点高精度、快实时的计算要求. 

Combinational Model for Real-time Computing Rocket Falling Point Based on Space Delamination

A mathematical model based on space delamination combining geometric and dynamical models for falling point calculation is proposed to ensure the safety of the space launch mission's flight zone and to achieve high accuracy and fast calculation of rocket falling point in real time. The model stratifies the trajectory into a free segment and a re-entry segment. In the free segment, an elliptical geometric model is used considering Earth oblateness correction and in the re-entry segment, a dynamic model is used adding air resistance. Corrections for factors such as geophysical disturbance and garth rotation are also incorporated. Through validation of actual falling point data, it is found that the model can maximize the integration of accuracy and efficiency, and could be used to calculate rocket falling point for space launch missions with high accuracy and real-time performance.