利用变结构控制的不变性，使受控系统在滑模面上与满足匹配条件的系统不确定性无关。
By using the invariance property of VSC, the controlled system independent of the uncertainty which satisfies the matching condition on the sliding surface.
首先在相对运动学的基础上建立了归一化的导弹—目标的运动学模型，然后利用变结构控制理论设计了导引律。
The unitary missile target kinematics model is established based on the relative kinematics firstly. Then the guidance law is designed using variable structure system theory.
通过对一类相当复杂的变分方程问题的研究并利用其有关结论，我们证明了新模型最佳控制的存在性并刻划出其结构。
From studying some kind of quite complex variational equation problems and applying the conclusion, we prove that the optimal control of new model is existent and characterize its structure.
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