再入航天器滚速变化引起的落点误差分析

用转子动力学理论研究了再入航天器滚速变化引起的落点误差。通过分析一般攻角方程，给出了再入航天器的进动规律和配平攻角，据此，求出了不旋转航天器的落点误差；将轨迹分段后，推出了常值滚转速率航天器的平均落点误差；在滚速过零一周范围内，通过确定过零高度，分析了过零误差机理，并对该误差进行了计算；最后，分析了低空联锁共振现象，给出了发生联锁共振的条件和误差计算公式，并得出了几个重要结论。

ANALYSIS OF REENTRY VEHICLE IMPACT ERROR RESULTING FROM ROLL VELOCITY CHANGES

This paper researches into reentry vehicle impact errors which result from the roll velocity changes by use of rotor dynamic theory.The roll regularity and balance attack angle are presented through analysis of general attack angle equation,and the impact dispersion of non spinning vehicle is got.Steady roll impact error can be obtained when the reentry trajectory is divided into many sections.Roll pass zero(RPZ) impact error is analyzed and calculated on the basis of RPZ height.The roll resonance phenomena are discussed.The conditions of roll resonance and dispersion calculation formula are given also.Finally,Several important conclusions are presented.