现在我们见到的大多都是四轴，六轴和八轴，现在看看牛人搞的单轴也能妥妥的飞行
Whether they look like a thermos or a bracelet, today's drones come in all shapes and sizes, but they all involve a bunch of moving parts to keep them balanced in the air. Swiss researchers have now fashioned a drone that remains airborne through a single propellor, resulting in what they describe as the mechanically simplest controllable flying machine in existence. Researchers at ETH Zurich's Flying Machine Arena spend their days picking apart drone design and what tasks they might be able to perform. Part of this involves investigating how swarms of small drones can collaborate to build things, work which culminated in awalkable rope bridge built entirely by flying robots last year. The Monospinner is their latest creation and the drone doesn't seem to serve much of a practical purpose, unless you're looking to film a very fast merry-go-round or deliver whipped cream. Where conventional multicopters hover in place through a number of rotors that create an upward thrust to cancel out their weight, the Monospinner relies on just one. The engine driving the propellor at the top is the drone's only moving part. By having the vehicle rotate about four times each second at a constant angular velocity with a certain propellor force, the Monospinner is able hold its position in the air and stop from flipping over.
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2016-05-24
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