基于变结构的鱼雷垂直命中导引律设计

Design of torpedo vertical hitting guidance law based on variable structure

通过鱼雷与目标舰船运动关系推导了鱼雷与目标舰船视线角变化的状态方程,设定控制量,采用变结构控制方法对控制量进行设计,使得鱼雷与目标舰船连线同目标航向夹角控制在45°,由此达到鱼雷垂直命中目标的目的,通过李雅普洛夫稳定性理论证明了控制器的稳定性。仿真分析表明:在本文设计的变结构拦截导引律作用下,鱼雷与目标舰船视线与目标航向夹角稳定趋于45°角,鱼雷以垂直方式精确命中目标舰船。

Because traditional guidance law for torpedo cannot get good vertical hitting precision, the paper achieve state equation of angle of sight elevation between torpedo and target warship through moving relation between torpedo and target warship. For achieving the purpose of torpedo hitting the target vertically, based on that state equation, the paper designed a variable structure controller to make angle of sight between torpedo and target warship controlled on a designated angle that can be demonstrated by Lyapunov stability theory. Simulation show that angle of sight elevation between ATT and target torpedo tend to zero stably and ATT hit target precisely under longitudinal intercepting guidance law based on variable structure.