充气展开式再入航天器落点精度影响因素研究

Study on Influencing Factors of Landing Dispersion of Inflatable Deployment Reentry Spacecraft

为了明确充气展开式再入航天器落点精度的影响因素,针对充气展开式航天器的典型外形,在完成气动力系数和标称再入弹道设计的基础上,结合所选取的误差源,分别分析了单一和组合误差源对落点偏差的影响情况。研究结果表明:大气密度、风、气动力系数、再入点纵向位置偏差和再入角偏差对落点精度影响较大,应针对其中可控因素重点采取措施。后续可考虑引入再入段主动控制进一步提高落点精度。

In order to determine the influencing factor of landing dispersion of the inflatable deployment spacecraft,a typical shape of inflatable deployment spacecraft was selected.Based on aerodynamic coefficient calculation and nominal reentry trajectory design,the influence of single error source and combined error sources on landing dispersion were analyzed according to the selected error sources.The results showed that the influence of atmosphere density error,wind disturbance,aerodynamic coefficient error,reentry point range error and flight path angle error on landing deviation was larger and corresponding measures should be taken for the controllable factors.Active control may be considered for the reentry to further increase landing accuracy.