基于虚拟目标的大气层内拦截弹中制导律研究

Research on Midcourse Guidance Law for Interceptor Based on Virtual Target

导引头侧窗探测技术的采用和大气层内气动力的存在要求针对该空域内目标的拦截弹于中制导末端,在零攻角的情况下将目标收入侧窗视场内,并针对目标的预测脱靶量为0,以满足中末制导交班和末制导弹道平直性的要求。基于此,本文从中制导末端的视场角约束和预测脱靶量为0出发,分析拦截弹中制导末端应达到的理想位置和运动状态,并据此设置虚拟目标和终端约束,运用最优控制原理设计针对虚拟目标的优化导引律。Matlab仿真结果验证了该方法能有效地保证交班条件和脱靶量要求的满足。

The adoption of side window detection technology and the existence of aerodynamic force in the atmosphere require that interceptors for targets in this airspace must see their targets with zero attacking an- gle and achieve zero prediction miss by the end of midcourse guidance. Due to these requirements, the vision constraints and zero prediction miss distance conditions are analyzed. Then the ideal position and obliquity that should be achieved by the vehicle in the end of the midcourse guidance are obtained and virtual target and terminal constraints are set up. Aiming at the virtual target, the optimal control law is introduced to design the optimal guidance law for the guidance. The Matlab simulation results verify that the proposed method can guarantee the hand-over conditions and the satisfaction of miss value as well.