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针对打击地面目标的制导问题,提出了一种新的具有终端角度约束的鲁棒滑模制导律。在建立地面目标和导弹的相对运动学关系的基础上,基于零化弹目视线角速率的思想,采用变结构控制理论的方法,通过选择理想的终端角度确定一个光滑的非线性滑动模态,代替传统末制导律设计的滑动模态,利用Lyapunov稳定理论设计得到了具有鲁棒性的滑模末制导律,实现了在有限时间精确打击目标,满足终端角度的要求。数字仿真表明,这种制导律对目标的运动具有很好的鲁棒性和适应性,并能获得良好的制导精度和指定的终端角度要求。
Aiming at the guidance problem of ground targets, a new robust sliding mode guidance law with terminal angle constraints is proposed. Based on the relative kinematics relationship between ground targets and missiles, the variable structure control theory is used to determine a smooth nonlinear sliding mode by selecting the ideal terminal angle, Instead of the sliding modes designed by the traditional terminal guidance law, the robust sliding mode guidance law is obtained by using the Lyapunov stability theory, which realizes the target of precision strike in a limited time and meets the requirement of terminal angle. The numerical simulation shows that the guidance law has good robustness and adaptability to the target’s movement, and can obtain good guidance accuracy and specified terminal angle requirements.