翼伞

Since the model of the canopy and suspension lines are made of flexible fabric, therere some difficulties in wind runnel testing, Such as model supporting, attitude controlling and measuring, and pitch moment measuring etc., compared with the common rigid models used in wind tunnel testing.

由于翼型伞主要由伞衣、伞带等柔性纺织物组成，其风洞试验技术与采用刚性模型的常规风洞试验相比，在试验模型的支撑、模型姿态角控制及测量、作用在模型上力矩的测量等方面都有一定的技术难度。

In this project, the wind tunnel test results of parawing pitching moments was gotten in the first time.

在开展翼型伞风洞试验技术研究的同时，对翼型伞气动特性的工程估算方法进行了初步研究。

WING LOADING: Are you light on your wing or heavy?

伞翼负载：对于你的伞翼来说，你自身的体重始终还是轻？

And the study of parafoil inland lagged behind greatly.

国内对翼伞的研究与国外相比还有很大差距。

All those studies would be references and theoretical bases to design and working-process analyses of parafoil system.

利用最优控制原理对翼伞系统的归航问题进行了研究，并对其特点进行了分析和总结。

And the error variable was solved analytically making use of"Project Point". Then the traditional PD controller and gain-scheduling fuzzy PD controller were designed to realize path following of parafoil system.

同时，基于翼伞系统基本运动特性，提出了一系列有针对性的控制策略，其中重要的一条是，将平均风的影响在轨迹归航中修正，而大气紊流的影响作为干扰由控制器来补偿。

Parafoil;airdrop;control rope;position prediction

翼伞；空投；操纵绳；位置解算

For Helicopter .. never never never release the other side brake always keep it in same point.if u release it,u should prepaire urself for the fastest spin..

直升机其实就是一种处于可控状态的水平螺旋－－即在非常低的速度下，失速速度下的spin；伞以自身的立轴为轴心旋转，而飞行员处于伞的正下方一起旋转；在动作中，伞看起来像直升机的旋翼一样转动，故得名：直升机；该动作的垂直速度非常低，大约为在1.3米/秒到2米/秒之间。

When the founder became paralyzed in a paragliding accident

创始人在一次翼伞飞行事故中不幸瘫痪后

Active flying is keeping your wing exactly above and centered to your body.

激烈的操伞必须保持你的伞翼准确在你头上方且身体重心保持在伞翼中央。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。