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。
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.
海湾里的灯火近了，一定是归航入港的渔船。
In the bay, the lights come closer - fishing vessels no doubt, returning to harbor.
系统采用PID改进的带盲区的非比例径向归航控制算法，获得较好的控制性能。
The system adopts non-proportion radial homing control algorithm with modified PID blind zone, and its control capability is great.
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