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  • Let me introduce to you Rezero.

  • This little fellow was developed

  • by a group of 10 undergraduate students

  • at the Autonomous Systems Laboratory

  • at ETH-Zurich.

  • Our robot belongs to a family of robots

  • called Ballbots.

  • Instead of wheels, a Ballbot is balancing

  • and moving on one single ball.

  • The main characteristics of such a system is

  • that there's one sole contact point to the ground.

  • This means that the robot

  • is inherently unstable.

  • It's like when I am trying to stand

  • on one foot.

  • You might ask yourself, what's the usefulness

  • of a robot that's unstable?

  • Now we'll explain that in a second.

  • Let me first explain how Rezero

  • actually keeps his balance.

  • Rezero keeps his balance by constantly

  • measuring his pitch angle with a sensor.

  • He then counteracts and avoids toppling over

  • by turning the motors appropriately.

  • This happens 160 times per second,

  • and if anything fails in this process,

  • Rezero would immediately fall to the ground.

  • Now to move and to balance,

  • Rezero needs to turn the ball.

  • The ball is driven by three special wheels

  • that allow Rezero to move into any direction

  • and also move around his own axis

  • at the same time.

  • Due to his instability, Rezero is always

  • in motion. Now here's the trick.

  • It's indeed exactly this instability that allows

  • a robot to move very [dynamically].

  • Let's play a little.

  • You may have wondered what happens

  • if I give the robot a little push.

  • In this mode, he's trying to maintain

  • his position.

  • For the next demo, I'd like you to introduce

  • to my colleagues Michael, on the computer,

  • and Thomas who's helping me onstage.

  • In the next mode, Rezero is passive,

  • and we can move him around.

  • With almost no force I can control

  • his position and his velocity.

  • I can also make him spin.

  • In the next mode, we can get Rezero

  • to follow a person.

  • He's now keeping a constant distance to Thomas.

  • This works with a laser sensor

  • that's mounted on top of Rezero.

  • With the same method, we can also

  • get him to circle a person.

  • We call this the orbiting mode.

  • All right, thank you, Thomas.

  • (Applause)

  • Now, what's the use of this technology?

  • For now, it's an experiment, but let me

  • show you some possible future applications.

  • Rezero could be used in exhibitions or parks.

  • With a screen it could inform people or show

  • them around in a fun and entertaining way.

  • In a hospital, this device could be used to

  • carry around medical equipment.

  • Due to the Ballbot system, it has a very small

  • footprint and it's also easy to move around.

  • And of course, who wouldn't like

  • to take a ride on one of these.

  • And these are more practical applications.

  • But there's also a certain beauty

  • within this technology.

  • (Music)

  • (Applause)

  • Thank you.

  • (Applause)

  • Thank you.

Let me introduce to you Rezero.

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B1 US TED robot mode move thomas instability

【TED】Péter Fankhauser: Meet Rezero, the dancing ballbot (Péter Fankhauser: Meet Rezero, the dancing ballbot)

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    Zenn posted on 2017/04/16
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