基于扩张状态观测器的攻击角度约束制导律

为满足现代战场对拦截弹特定攻击角度约束的要求,设计了一种自适应滑模制导律。以弹目视线角与视线角速率为状态变量,在二维平面建立了制导模型;采用一种自适应滑模趋近律,设计了具有攻击角约束的制导律;采用扩张状态观测器,对目标机动进行估计补偿,并用于所设计的制导律。进行了仿真分析,结果表明,所设计的制导律能够引导拦截弹以期望的角度命中目标,对于目标的机动具有一定的鲁棒性,能有效实现对目标实行特定角度攻击并基本满足零脱靶量的要求。

Guidance Law with Terminal Attack Angle Constraint Based on Extended State Observer

To meet the requirements of missile with terminal-attack-angle constraint in modern battlefield, an adaptive guidance law with terminal attack angle constraint was derived. A guidance model was deduced in the two-dimensional coordinate system by considering the LOS angles and its change rate as state variables. A guidance law with terminal-attack-angle constraint was designed by adopting an adaptive reaching law. An extended state observer was adopted to compensate the target maneuvering. The simulation results show that the guidance law can be used to hit the target with expected terminal-attack-angle. The guidance law has robustness for target maneuvering,and it meets the requirement of zero miss amount.