掩护攻击下从弹的导航与制导方法

针对全导式多弹头在确保射击精度与弹头密集分布条件下的作战需求,提出了一种数值导航计算和相对制导的方法。基于零视加速度理论,在自由段采用数值导航计算方法,有效地消除了惯性导航系统加速度计漂移误差对导航精度的影响,减小了弹头落点偏差。以摄动制导理论为基础,研究了从弹伴随主弹飞行的相对制导方法,设计了满足落点约束的姿态控制方程和制导关机方程,将从弹和主弹分离时刻的状态参数作为标准关机量,实时计算分离后从弹的关机量并与标准关机量进行对比,满足相对距离条件则实施关机。仿真表明:通过数值导航与相对制导方法能有效实现全导式多弹头的伴随飞行,并以较高精度命中目标,从弹掩护主弹攻击的效果较好。

Navigation and Guidance Method of Multi-warhead Under Cover Attack

To ensure the firing accuracy and warhead density of guided multi-warhead,a numerical navigation and relative guidance method was proposed. Based on the zero apparent acceleration theory,the numerical navigation method was adopted in unpowered phase,which effectively eliminated the influence of drift error of accelerometer on the navigation accuracy and reduced the drop-point deviation of warhead. The relative guidance method was also studied based on perturbation guidance. The attitude control equation and guidance cutoff equation were designed. The state parameters of the separation moment of the main warhead and the subordinate warhead were used as the standard shutdown amount,and the shutdown amount of the subordinate warhead was calculated in real time and compared with the standard shutdown amount,and the shutdown was implemented when the relative distance condition was met. Simulation shows that,through the numerical navigation and relative guidance,the guided multi-warhead can effectively achieve the formation flight and hit the target with a high precision. The subordinate warhead shielding the main warhead has a good attack effect.