直升机

The robust stability analysis of three degrees of freedom helicopter singular systems is complex and difficult to design. Based on state-space theory, the linear dynamics model of three degrees of freedom helicopter was constructed.

针对三自由度直升机奇异系统鲁棒稳定性分析复杂，且难以设计稳定的控制器问题，基于状态空间方法建立了三自由度直升机模型的线性动力学系统模型。

At the last, some maneuver flight simulations are calculated with the six-degree model. Somersaulting flight of helicopter is analyzed simply. It is obtained that the limit of overload is important in somersaulting flight of helicopter.

最后，运用六自由度仿真模型进行机动飞行仿真计算，对直升机筋斗飞行作初步探讨，得出过载限制是直升机作筋斗飞行的重要障碍。

In terms of payload, stealthiness, power and transmission, it's already superior to the other helicopters like tiger and A-129 that are in the market. And once the MMW FCR is developed and placed on top of the rotor, I really can't think of what other helicopters have that it doesn't. Remember, Apache didn't get the MMW radar until Longbow.

在有效载荷、隐身、动力与传输系统方面，它要比市场上的其他直升机，如虎式、A129性能更好，而且一旦毫米波射控雷达研发完毕，安装在旋翼上部时，我确实想象不出还有同类型的直升机，阿帕奇是知道发展到长弓型号时才具备的，但这可不便宜。

In this paper, the flow properties of helicopter landing and taking-off region and its influence on flight safety are introduced first, then the flow of flight deck is simulated using finite element method on the basis of Navier-Stokes equations, and the simulated results are compared with test results. The helicopter flight properties on flight deck is discussed, and it is point...

本文首先介绍了直升机舰载起降区域的气流流动特点及其对飞行的影响，然后以纳维—斯托克斯方程为基础，利用有限元法对甲板区域的气流流动进行了仿真计算，并将仿真结果与实验结果做了对比，分析了直升机在该甲板区域内的飞行特点，指出应重视流场对飞行安全的影响。

Up to 16 medium (NH90, Tigre) or 35 light helicopters can be carried and stored in the hangar deck.

多达16个中等（NH90直升机，提格雷语）或35架轻型直升机，并可以进行在机库甲板中。

You can be excellent and safety, affordable price for single-engine two-seater Robinson R22 helicopter, in the past two decades, the world's most popular light helicopter.

优越的优能和安全性，实惠的价格让单发动机双座R22罗宾逊直升机，在近二十年的时间里，成为世界上最受欢迎的轻型直升机。

The position and attitude of unmanned helicopter is the basis of autonomous flight control of helicopter.

无人直升机的位置与姿态检测是直升机自主飞行控制的基础。

Besides, a general survey of the helicopter production in the weald is introduced in the beginning and some views on the development of helicopters are taken at the end.

此外，在文的开头，介绍了世界上直升机生产的一般情况，而在文的末尾，谈了一些对直升机发展的看法。

Besides, a general survey of the helicopter production in the weald is introduced in the beginning and some views on the development of helicopter s are taken at the end.

此外，在文的开头，介绍了世界上直升机生产的一般情况，而在文的末尾，谈了一些对直升机发展的看法。

Following on from experience gained during the development of remotely piloted helicopters Westland started investigations in 1977 into a light two seat helicopter that could be used for aerial reconnaissance without the need for a skilled pilot.

以下从经验中获得发展的遥控直升机韦斯特兰于1977年开始成为两个座位轻型直升机，可用于空中侦察使用而不需要一个熟练的试点调查。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。