Secondly, the exponential slippage guidance method and optimal energy transfer orbit are designed respectively in the homing phase.

其次，在导引段，以脉冲控制策略为前提，分别设计了指数滑移导引律和能量最优转移轨道。

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The homing progress can be divided into 6 phases by altitude. Guidance algorithm of every phase and stability of the system are discussed. Finally a conclusion is made in this paper.

文章介绍一种翼伞精确定点着陆归航的方案，按高度将归航过程划分为6个阶段，给出了每个阶段的制导算法，讨论了系统的稳定性并给出结论。

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Then, the idea of(multiphase) trajectory programming and features in each phase are introduced. And a set of homing project for different conditions is brought forward.

对于分段规划法，详细介绍了其设计的思想和各阶段的特点，并根据不同的情况提出了一整套的归航方案。

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Then, the idea of(multiphase) trajectory programming and features in each phase are introduced. And a set of homing project for different conditions is brought forward.

对于分段规划法，详细介绍了其设计的思想和各阶段的特点，并根据不同的情况提出了一整套的归航方案。

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