飞机起落架

Bell also invented the photophone, the ancestor of optical transmission systems; the audiometer, which is still used to test hearing; a device to find icebergs by listening to underwater echoes, the ancestor of SONAR; a desalinating machine for removing salt from seawater; a medical jacket that was the predecessor of the iron lung; the hydrofoil boat; and was part of a team that invented the three-wheel landing gear and wing flaps for airplanes.

贝尔还发明了光电话，光传输系统的原形；听度计，现在还在用于测试听力，通过使用这种装置收听水底回升发现冰山，是SONAR的原形；一种将盐从海水中分离的淡化海水装置；一种医用夹克，是人工呼吸机的前身；水翼艇；贝尔作为研究队伍成员之一还参与发明了飞机三轮起落架和襟翼。

Aircraft carrier-based fighter, not even with the slide jump the catapult off the front wheel traction mode, the aircraft landing stage in the block are inevitably linked with a bow after the process, the front landing gear before the grounding process necessarily requires the structure to withstand large the impact of such a large impact load without a decentralized structure with high strength and conductivity is unbearable.

航母舰载战斗机即使采用滑跃而不是前轮牵引的弹射起飞方式，飞机在拦阻着陆阶段挂钩后都必然会有个低头的过程，前轮接地过程中前起落架必然需要在结构上承受很大的冲击，这么大的冲击载荷如果没有一个高强度的结构进行分散和传导是难以承受的。

Stalky main undercarriage units retracted into the wing, while a nosewheel unit retracted forward into the extreme nose.

对由Schempp-Hirth制造的Goppingen Go 9 试验机进行相关测试，其像铅笔般长的机身要容纳下一台59.6千瓦(80匹马力)的Hirth HM 60R 发动机，发动机安装固定的位置是在重心下方的肩定翼上，同时飞机的前起落架可缩进到前鼻中去了。

On the assumption that the unevenness of runway profiles along the direction of taxi - ing is a stationary random function,techniques of piecewise constant-speed taxi ing runs and piecewise linear representation of dynamic properties of airplane landing gears are adopted in this paper to approximately simplify the actual nonlinear and nonstationary random vibration prob-lems to the piecewise linear and stationary ones.

在飞机滑行方向跑道路面不平度为平稳随机函数的假设下，采用滑行过程分段等速化、起落架动态特性分段线性化方法，把原非线性非平稳随机振动问题，简化为分段线性平稳随机振动问题。

This model reproduced the main general features of the 'Strap-on', but the pilot now had a seat and a tubular tripod assembly with three small wheels to act as landing gear, and also a hanging stick to control the aircraft.

该模型再现了主要的一般性功能的'捆绑式'，但现在已经有三个试点小轮子一个座位和一个管状三脚架装配作为起落架，并悬挂坚持控制飞机。

I once heard of a man who fell out of a plane but then managed to grab onto the undercarriage.

我曾听说有一个人从飞机上掉下来，却刚刚握著飞机的起落架。

The undercarriage on light aircraft do not always retract in flight.

轻型飞机飞行时起落架不一定缩回。

The elevational images could be obtained by resolving camera parameters and correcting digital images with numerical differential. Throughout image processing, the marks on the undercarriage wheels and airframe were high-accurately tracked and identified based on sub-pixel. The trace, velocity and other parameters of the undercarriage were gained by data processing.

同时，应用摄影测量原理，通过对摄影机的标校，获得了摄影机的参数；利用图像的数字微分纠正原理，对所摄图像进行修正和重建，得到摄影机的正摄影像，进而利用图像处理方法对起落架机轮及机身测量标志进行基于亚像素的跟踪判读；对判读数据进行处理，得到了飞机着陆道面段的运动轨迹、速度等数据。

The joint pontes of the front undercarriage of an aircraft is a fatigue critical part,its fatigue life has to be estimated exactly.

某型飞机前起落架后接头连接区为疲劳危险部位，必须准确地估计疲劳寿命。

The joint pontes of the front undercarriage of an aircraft is a fatigue critical part,its fatigue life has to be estimated exactly.

中文摘要：某型飞机前起落架后接头连接区为疲劳危险部位，必须准确地估计疲劳寿命。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。