针对平面拦截问题 ,选择导弹和目标之间的相对速度矢量与导弹 -目标视线之间的夹角 (称为相对航向误差角 )作为将要被控制到零的输出。将与目标运动的加速度和速度方位信息有关的量视为干扰量 ,基于变结构控制理论设计了一种鲁棒制导算法。该制导算法不需要得到目标精确的加速度和速度方位信息 ,因而更便于工程实现。仿真结果表明 ,该制导算法对目标的机动具有强的鲁棒性 For planar interception problems, the angle between the relative speed vector between the missile and the target and the missile-target line of sight (referred to as the relative heading error angle) is selected as the output to be controlled to zero. Considering the acceleration and velocity information of the target movement as the disturbance quantity, a robust guidance algorithm is designed based on variable structure control theory. The guidance algorithm does not need to get accurate target acceleration and velocity orientation information, which is more convenient for engineering implementation. The simulation results show that the guidance algorithm is robust to the maneuvering of the target