探月飞船预测-校正再入制导律设计

针对以第二宇宙速度返回的探月飞船再入制导律设计问题，采用一种数值预测一校正的预测制导法，分析了飞船配平攻角的飞行特性，建立了再入三自由度运动方程。进而详细介绍了预测一校正及其纵向、横向制导律的基本原理。通过标准初始状态、有误差初始状态两种条件下的仿真分析，表明这种预测一校正制导律在满足各种约束的条件下，不仅能够达到较高的精度，而且对初始误差具有良好的鲁棒性，能够应付再入时各种不确定性因素的影响。

Design of Predictor-Corrector Reenty Guidance Law for Lunar Mission Spacecraft

For the guidance law design problem of lunar spacecraft reentry at the second cosmic velocity,a predictor-corrector guidance method is adopted.The flight characteristic of spacecraft at the balanced attack angel is analyzed,and then the three degrees of freedom motion equation for reentry is established.Furthermore,the theory of predictor-corrector and its longitudinal and lateral guidance laws are introduced in detail.Reentry simulation in such two conditions,one in standard initial condition and other in ...