非线性变结构制导律

为使导弹制导系统具有良好的鲁棒性能和适应性能，本文基于Lyapunov稳定性理论，利用滑模控制来设计导弹的末端导引规律。考虑结构摄动和目标机动加速度的界未知情况下，提出了一种基于零化视线法向速度的具有强鲁棒性的末端导引规律，这种制导律在保证系统闭环稳定的前提下能够在线对结构摄动和目标机动加速度的界进行估计。仿真验证说明所提出的方法是有效的。

Nonlinear variable structure guidance law

In this paper,the design of robust controller for a class of uncertain nonlinear systems is considered,and the adaptive variable structure robust controller is presented with uncertainly unknown boundary of structure perturbation and disturbance.It can estimate the uncertain boundary of structure perturbation and disturbance on the premise that the stabilization of close-loop system is guaranteed.The method is applied to the design of anti-ballistic missile strongly robust endgame guidance law based on zeroing normal speed of LOS.The algorithm is very simple and never needs the boundary of the acceleration of target, so it is more convenient for comprehension and practical implementation.The simulating results show that the algorithm is very effective.