基于摄动制导的运载火箭一子级落点控制

Impact Point Control of First Sub-stage of Launch Vehicle Based on Perturbation Guidance

针对运载火箭一子级落点横向散布较大的现状,找出了落点横向散布主要影响因素,提出在一级飞行后段施加摄动制导的一子级落点控制方法,并针对入轨精度和与载荷相关的特征参数作了影响分析。经分析表明,该方法能显著减小一子级横向散布,对入轨精度影响极小,不会导致箭体结构破坏,有利于弹道设计和落区安全工作的开展。

Aiming at the current situation of obvious cross-range dispersion of LV's first sub-stage,the main influence factors are found.A method of impact point control of first sub-stage by adopting perturbation guidance in latter segment of first stage flight is presented.The influence analyses of injection accuracy and loading-relative characteristic parameters are also performed.Analysis results demonstrate that this method can reduce significantly the cross-range dispersion of LV's first sub-stage with precious few effects on injection accuracy,without causing LV's destruction,and will be useful in trajectory design as well as downrange safety.