带终端攻击角度约束的变结构制导律

Variable structure guidance law with terminal attack angle constraint

针对某些导弹要求限制终端攻击角度的作战要求,基于滑模变结构控制理论,推导出一种对脱靶量和终端攻击角度约束的变结构制导律,在此基础上对弹-目相对距离变化率进行了估计,并对所提出制导律的性能进行了分析。所得制导律形式简单、实用,且克服了被动寻的导弹不能测弹-目距离变化率的约束。仿真结果证明,对于某些作变加速机动的目标,该制导律都能够以期望的终端攻击角度命中目标,对于目标的机动具有较好的鲁棒性。

Aiming at war requirements of some missiles with terminal attack angle constraint, a kind of variable structure guidance law with miss distance and terminal attack angle constraint was derived according to slip-form variable structure control theory. Performances of the proposed guidance law were analyzed. The law is simple and practical, moreover it can overcome limitation of the passive target homing missile, which can＇t measure the distance change rate between missile and target. The simulation results show that the guidance law can be used to hit the varying accelerated targets with expected terminal attack angle. The law shows better robustness for maneuvering target.