According to the three degree of freedom (3dof) helicopter model, this paper present a novel robust controler based on LQR and fuzzy theory.

本文针对三自由度直升机模型设计了基于线性二次型调节器(LQR)和模糊逻辑的鲁棒控制器。

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Take a look and you'll see quality and creative 3d model of helicopter!

看一看，你会看到3d模型直升机的优质和创意！

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The following pictures are made from a model of a helicopter with a camera attached to it.

以下的图片是在一个直升飞机上利用摄相机拍摄的。

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The grounding of a Super Puma helicopter model following an incident off Shetland last October has hit growth in passenger numbers at Aberdeen International Airport.

BBC: Super Puma grounding hits Aberdeen air traffic

Be sure your pilot has training in that specific model helicopter before you board.

FORBES: 10 Essential Checks Before You Step Into A Helicopter

The basic model of the helicopter can also be adapted for medical evacuation or a purely offensive combat role.

BBC: News | In Depth | Military Fact Files