基于主动螺旋变轨的三维末制导律研究

Research on 3D Terminal Guidance Laws Based on Actively Self-homing Spiral Variable Trajectory

针对解决我方导弹既能够规避敌方拦截导弹又能够准确命中海面机动目标的问题,提出了一种超声速反舰导弹自寻的主动螺旋变轨的三维导引设计方案。首先建立了三者在三维空间中的运动几何关系模型;然后基于自适应变结构控制的思想采用让视线角速率跟踪给定衰减螺旋指令信号的方法使导弹在打击目标的过程中实现螺旋变轨,以逃避敌方导弹的拦截;同时选择合理的参数使弹目间视线角速率在飞行过程中趋于零,以保证我方导弹能够准确命中海面机动目标。仿真结果表明,该制导律既能够使反舰导弹进行主动螺旋变轨,在4.41 s使敌方拦截弹的脱靶量达到最小值209.233 m,又能以脱靶量0.932 m的精度命中其机动舰艇。

Design scheme of 3D guidance laws （GLs） based on actively self-homing spiral variable trajectory for the supersonic antiship missile was proposed to solve that the friendly missile can either evade the enemy interceptor or hit the sea maneuver target. Geometric relation models of relative motions among the missile, the interceptor and the ship were established; spiral variable trajectory of the missile during the course of pursuit was realized by making angular rate of line-of-sight-angle （LOSA） track the given spiral variable trajectory command signal based on the adaptive sliding mode variable structure control idea to evade the enemy interceptor; angular rate of LOSA during the course of flying was approached to zero by selecting the reasonable parameters to ensure that the friendly missile can hit the sea maneuver ship. The simulated results show that the GLs can either make the antiship missile perform actively spiral variable trajectory, i.e. make the miss amount of the enemy interceptor reach the minimum of 209. 233 m at the time of 4.41 s, or hit the sea maneuver ship at the precision indicated by the miss amount of 0. 932 m.