有限时间收敛的非光滑制导律设计

Non-smooth Guidance Law Design with Finite Time Convergence

针对机动目标拦截问题,设计基于扩张状态观测器的有限时间收敛制导律。首先利用非光滑反馈控制技术,结合有限时间Lyapunov稳定理论,设计了无抖振的滑模制导律。其次为了削弱目标机动对制导精度的影响,设计了一种非齐次干扰观测器,对系统中目标机动带来的总扰动进行有限时间估计,提高了对机动目标的拦截精度。最后,数字仿真验证了这种非光滑连续制导律的有效性。

A finite-time convergence guidance law based on ESO （Extended State Observer） was pro- posed for the maneuvering target interception problem. Firstly, combined with the finite-time Lyapunov stability theory, non-smooth feedback control technique was applied to design a non-buffeting slide mode guidance law. Secondly, a non-homogeneous disturbance observer was designed to estimate the system disturbance caused by the target maneuver, to relax the influence of target maneuver on the guidance ac- curacy and improve the precision of the interception. Lastly, The numerical simulation verified the effec- tiveness of non-smooth continuous guidance law.