一种提高弹道导弹突防性能的思路是使导弹具备中段变轨能力。文中提出一种兼顾突防有效性和弹头落点精度的变轨方向选择方法,将空间三维拦截问题转化到垂直于弹目视线矢量的二维平面内进行分析,结合偏导数计算选择落点偏差最小的弹头变轨方向,引入零射程线概念,避免弹上搜索计算,在保证有效突防前提下降低落点修正对推进剂的需求。该方法能够有效简化制导计算过程,易于工程实现,提升导弹武器总体性能。

A way to improve penetration performance is to let missile has trajectory-transfer capability in passive ballistic curve. A trajectory-transfer direction selection method was put forward, which considers the balance between penetration effectiveness and warhead CEP precision. The method converts three-dimensional space interception analysis into two-dimensional perpendicular to line of sight, combines with partial derivative calculation, selects the direction which trajectory-transfer causes the smallest CEP. The method introduces zero-range orientation concept to avoid search computing. Correction method was given to reduce the need for propellant. The method can simplify guidance process, easy to implement, enhance overall performance of missile.