基于零控脱靶量的思想,提出一种能够有效针对大气层再入目标的滑模末制导律.首先,建立纵向平面内的弹目相对运动方程；然后利用扩张状态观测器对目标机动加速度信息进行估计,并对零控脱靶量算法进行分析,提出了制导律的设计思路；接着利用滑模变结构控制理论进行制导律的推导；最后进行仿真分析,仿真结果证明,所设计的制导律能够很好地对目标弹进行拦截,并且指令的跟踪效果也很好,从而验证了算法的有效性.%One algorithm of sliding terminal guidance law,which can effectively intercept the target of the reentry aerosphere,is devised based on the zero effort miss (ZEM).Firstly,the model of the missile and target movement is bui then,the target acceleration information is estimated by using the extended state observer (ESO),and the zero effort miss algorithm is analyzed so that the thinking of the designing is carried out; then the guidance law is reduced by using the back stepping control; at last,the simulation result shows that the designed guidance law intercept the target effectively and the virtual command can track the actual command well so that the validity of the algorithm is tested.
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