Compared with single-rotor helicopter, the four-rotor VTOL ( vertical take-off and landing ) helicopter has smaller propellers, which can reduce the risk of crashing into the surrounding objects. o it can make the flight safer. 四旋翼垂直起降机相对于一般的单螺旋旋翼式直升机可以采用更小的螺旋桨,不至于使裸露在外面的螺旋桨刮到周围物体,从而使飞行变得更加安全。
PC-based Simulation System of Landing of Unmanned Helicopter on Ship Deck 基于PC机的无人直升机着舰仿真系统
Computer Vision Scheme Used for the Automate Landing of Unmanned Helicopter on Ship Deck 用于无人直升机着舰控制的计算机视觉技术研究
At present, the landing position of helicopter is measured by the method of eye-measurement, which has a low precision and a bad measurement environment. 目前,直升机落点位置的测量主要是依靠目测的方法进行,这种方法精度较差且作业环境恶劣,所以需要有一种新的测量方法来取代目测法。
A three-dimensional rigid body model is used to study the landing of a helicopter in autorotation. 首先,建立了一个描述直升机自转着陆飞行动力学特性的三维刚性体模型。