本文分析了导弹及目标纵向加速度对变结构制导规律鲁棒性的影响 ,针对两种情况进行了研究 :第一种情况是导弹及目标纵向加速度可测 ,存在测量噪声 ;第二种情况是导弹及目标纵向加速度不可测量 ,为未知量。通过理论分析给出了变结构制导规律实现鲁棒制导时制导参数应满足的条件 ,仿真结果证实了本文的结论 ,研究结果对于变结构制导规律的实际应用具有重要意义 This paper analyzes the impact of missile and target longitudinal acceleration on the robustness of variable structure guidance law, and studies two cases: the first case is the measurable longitudinal acceleration of the missile and the target, there is measurement noise; the second case is that the missile And the target longitudinal acceleration is not measurable, unknown. The theoretical analysis shows that the guidance parameters should be satisfied when the variable structure guidance law realizes the robust guidance. The simulation results confirm the conclusion of this paper. The research results are of great significance to the practical application of the variable structure guidance law