一种变结构垂直俯冲攻击制导律

A Variable Structure Guidance Law for Vertical Diving Attack

针对空地导弹垂直俯冲攻击的要求,建立导弹-目标运动模型,设计了一种对脱靶量和终端攻击角度约束的变结构制导律。运用自适应滑模趋近律,将目标机动视为干扰,并采用准滑动模态控制削弱了抖振的影响。所得制导律形式简单、实用,且克服了被动寻的导弹不能测量弹-目相对距离变化率的约束。分析了4个制导参数对制导效果的影响,为制导参数的选取提供了有力的依据。对电视寻的制导空地导弹进行仿真,结果表明:相对于偏置比例导引,所设计的制导律制导精度髙,弹道曲率变化较小,尤其在拦截末端,过载趋于零变化,降低了对执行机构的要求,具有一定的工程应用价值。

According to the requirements of air-to-ground missiles for vertical diving attacking,a missile-target motion model was built up and a variable structure guidance law was designed with constraints on miss distance and terminal attacking angle.Firstly,the target maneuvering was taken as a disturbance and quasi-sliding mode control was used to weaken the effect of flutter phenomena.The obtained guidance law was simple and practical,and could also overcome the limitation of the passive target homing missile,i.e.,the inability to measure the change rate of distance between missile and target.Then the effect of the four guidance parameters on the guidance performance was analyzed,which is helpful for parameter selection.Through simulation to television homing guided missiles,it was demonstrated that the proposed guidance law has better guidance precision and smaller trajectory curvature,which reduces the requirements to actuator,especially at the end of the interception.The research can offer some references for engineering application.