以特殊角度攻击地面固定目标的圆周导引律

Circular guidance law against stationary target with specified impact angle

针对某些导弹以特殊角度攻击地面固定目标的任务要求,提出了一种仅利用视线角测量信息就能实现末速方向控制的圆周导引律。该导引律的基本思想在于控制导弹沿着一系列由导弹和目标的实时位置及要求的命中点角度所确定的圆弧飞行。利用简单的几何原理即可快速解算出各时刻所需要的速度倾角,并将其转换成制导指令。仿真结果表明,与典型的最优导引律相比,圆周导引律更适合于过顶迂回攻击的情况,且受制导周期的影响较小,但受制导指令时延的影响较大。

Aiming at the problem that impact on the ground stationary target with specified angle is required for some guided missiles,a circular guidance law which only uses the line-of-sight angle information for terminal velocity direction control was derived.The idea of this approach is to guide the missile following a series of circular arcs determined by the specified impact angle and the real-time position of the missile and the target. Based on the simple geometrical principle,the required velocity inclination angle can be quickly worked out,which is then used for guidance command generation. Simulation results show that compared with the typical optimal guidance law,the circular guidance law presented is more favorable to the case of overhead-attack and is less affected by guidance periods,but is more affected by guidance order delay.