自适应二阶滑模制导律

传统基于Lyapunov定理所设计的制导律无法保证制导系统的有限时间收敛.基于滑模控制理论,给出了一种二阶滑模有限时间收敛方法,并将该方法与机动目标拦截情形相结合,进行制导律的设计.该制导律首项使得视线转率趋于0,而扩展项可满足视线成型,滑模面的有限时间收敛等特性.针对2种典型的目标机动形式进行了仿真研究,结果表明该滑模制导律可以实现目标的有效拦截,满足上述特性.

Self-Adaptive Second Order Sliding-Mode Guidance Law

Conventional guidance laws designed based on Lyapunov theorems can not ensure the finite time convergence of guidance system.A novel second-order sliding-mode control approach with finite time convergence is presented by using sliding-mode control theory and is used in a maneuvering target interception scenario for a guidance law design.The first part of this guidance law features similar structure of proportional navigation with time-varying effective navigation ratio,so that the line-of-sight rate tends to zero.The extension part of this guidance law features line-of-sight(LoS) shaping,finite time convergence of sliding mode surface and robustness to the variation of interception missile and target velocities. The simulations with nonlinear motion model are carried out for two typical target maneuvers. The results show that this guidance law can intercept the target effectively and can verify the above features.