【有羽毛的无人机 仿生装置显风采】

【有羽毛的无人机 仿生装置显风采】来自瑞士的 Dario Floreano 和他的团队打造出了一架具有“羽毛”的无人机。这架无人机拥有可变形的翼展,更利于机动和对抗风力,可以以高速穿过狭小的空间、飞跃障碍和急转弯。机翼主要由复合材料构成,提高强度的同时减轻重量。无人机可以实现远程控制,配备有命令电板和 GPS 。

The feathered drone that really does fly like a bird - and is so maneuverable it can negotiate city streets

By STACY LIBERATORE

Drone makers have turned to nature for their latest creation - a highly maneuverable winged machine with feathers.

The bio-inspired device can spread or close its wings while flying, making it easier to maneuver and more resistant in high winds.

Because of its ability to adapt to its surroundings, researchers believe the feathered drone will prove successful in city landscapes where winds change rapidly.

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A team from the Laboratory of Intelligent Systems was inspired to design this morphing wing drone while observing birds in flight.

'We were inspired by birds: they can radically transform the size and shape of their wings because they have an articulated skeleton that is controlled by muscles and covered in feathers that overlap when the wings are folded,' explained Matteo di Luca.

'The drone also has feathers that it can fold and overlap like a fan.'

This inspiration gave them the idea to build an energy-efficient winged drone capable of changing its wingspan, flying at high speed and moving through tight spaces – an aerial vehicle that would fare well in urban environments.

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'The wing is integrated into a drone equipped with a frontal motor for propulsion and roll is controlled by the controlled by the asymmetric morphing of the wing and pitch through a servomotor that moves an elevator located in the tail,' reads the study published in the Royal Society journal Interface Focus.

The drone is remotely controlled and is equipped with an electronic board that records motor and servomotors commands, attitude and GPS location.

And the feathered section is composed of eight artificial feathers.

Dario Floreano and his team wanted to develop a bio-inspired drone that could meet various aerodynamic requirements.

And created a 'must-have' list for their creation: it must be capable of flying between obstacles, making sharp turns and coping with strong winds.

The team discovered that by changing the drone's geometry mid-flight, the vehicle could hit these goals.

The outer wing is equip with moving parts that acts like a bird's quill feathers – the large feathers at the edge of the wing.

One of the many challenges was in designing and building the complex morphing mechanism, in other words, mimicking nature to construct the drone.

'It is extremely difficult to find the right balance between aerodynamic efficiency and the weight of the device,' explained Stefano Mintchev.

The wing is composed mainly of composite materials in order to maximize strength while reducing overall weight.

Morphing wings that can adapt to the environment and weather conditions are also an important issue in aeronautics.

Engineers are still trying to find the ideal replacement for the rigid wings and ailerons of planes.

For Floreano, the head of the Laboratory of Intelligent Systems, this is a promising project: 'With the foldable wings, we discovered that we didn't need ailerons to help the drone turn.

'By changing the wingspan and surface area during flight, we could make it turn automatically.'

http://www.dailymail.co.uk/sciencetech/article-4042556/The-feathered-drone-really-does-fly-like-bird-maneuverable-negotiate-city-streets.html

 


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