滑模干扰观测器的反机动目标末制导律设计

摘要

Aimed at the problem that maneuvering targets intercepted by interceptor at out of atmosphere are uncertain at endgame guidance,this paper presents a design method based on three�dimensional endgame guidance law.The paper establishes a relative motion equation with respect to the line of sight be-tween target and interceptor by adopting a robust guidance law with sliding mode control theory,and de-signs a guidance law to make the line of sight angular rates in elevation and azimuth engagement planes tend towards zero respectively.The paper integrates the super�twisting sliding mode disturbance observers (SMDO)into the guidance law to compensate uncertainties such as target maneuvers,thus reducing the required switching gains in the guidance law significantly.The simulation results indicate that the proposed sliding mode guidance law is high in guidance accuracy and is good in robustness to maneuvering target.%针对大气层外拦截器拦截机动目标的末段制导问题，提出基于滑模干扰观测器的滑模制导律设计方法。建立基于视线的拦截器�目标相对运动方程，采用滑模控制理论，设计使纵向平面和侧向平面内的视线角速率趋于零的制导律。通过超扭曲滑模干扰观测器，估计目标机动，从而补偿制导系统中的不确定项，并避免滑模切换控制的抖动问题。反机动目标末制导仿真结果表明，所研究的滑模制导方法具有满意的制导精度和鲁棒性。