Society of Robots - Robot Forum

General Misc => Robot Videos => Topic started by: Del on January 23, 2009, 01:28:55 PM

Title: Lego Ball Balancing Robot
Post by: Del on January 23, 2009, 01:28:55 PM: Someone made this balancing robot using the Lego NXT:

[youtube]f8jxGsg3p0Y[/youtube]

http://www.youtube.com/watch?v=f8jxGsg3p0Y
Title: Re: Lego Ball Balancing Robot
Post by: frodo on January 23, 2009, 01:33:21 PM: :o wow, how do they make it balance like that on a bal!!??
Title: Re: Lego Ball Balancing Robot
Post by: cooldog on January 23, 2009, 02:17:12 PM: the ball is placed between 4 wheels and the robot activtates each wheel depending on witch way it is leaning
Title: Re: Lego Ball Balancing Robot
Post by: frodo on January 23, 2009, 02:38:22 PM: Quote from: cooldog on January 23, 2009, 02:17:12 PM
the ball is placed between 4 wheels and the robot activtates each wheel depending on witch way it is leaning
yes, i got that part. what i don't get, is how it knows which way it is leaning.
Title: Re: Lego Ball Balancing Robot
Post by: Trumpkin on January 23, 2009, 02:39:22 PM: Quote
what i don't get, is how it knows which way it is leaning.
Gyro.
Title: Re: Lego Ball Balancing Robot
Post by: frodo on January 23, 2009, 02:41:13 PM: ok, so not accelerometer then which is what i was thinking. :D what is a gyro? is it like a spinning thing like you see on tv?
Title: Re: Lego Ball Balancing Robot
Post by: Trumpkin on January 23, 2009, 02:42:25 PM: Take a look at this http://www.hitechnic.com/index.html?lang=en-us&target=d24.html
Title: Re: Lego Ball Balancing Robot
Post by: frodo on January 23, 2009, 02:46:54 PM: oh, i get it now. thanks Trumpkin ;)
Title: Re: Lego Ball Balancing Robot
Post by: HDL_CinC_Dragon on January 23, 2009, 02:50:28 PM: Quote from: frodo on January 23, 2009, 02:41:13 PM
is it like a spinning thing like you see on tv?
Youre thinking of a gyroscope :)
Title: Re: Lego Ball Balancing Robot
Post by: frodo on January 23, 2009, 02:53:59 PM: i know, i've just figured it out. :)
Title: Re: Lego Ball Balancing Robot
Post by: Indiana_Geoff on April 27, 2009, 09:31:38 PM: I wonder if you used a captured ball as a hip on a walking robot, could you increase it's flexibility and make it more adaptable to shock and motion?
Title: Re: Lego Ball Balancing Robot
Post by: HDL_CinC_Dragon on April 29, 2009, 01:25:05 PM: In theory you probably could but you would have to worry about the strength of the joint i think
Title: Re: Lego Ball Balancing Robot
Post by: hazzer123 on April 29, 2009, 01:54:48 PM: Hmm what i'd like to see is an extension of this type of robot similar to the inverted double pendulum. So a robot on 2 balls balancing :D

Now that would be impressive!
Title: Re: Lego Ball Balancing Robot
Post by: chelmi on April 30, 2009, 08:35:03 AM: Quote from: HDL_CinC_Dragon on January 23, 2009, 02:50:28 PM
Quote from: frodo on January 23, 2009, 02:41:13 PM
is it like a spinning thing like you see on tv?
Youre thinking of a gyroscope :)

A MEMS gyro *is* a type of gyroscope. It doesn't use a spinning wheel but a vibrating part.
See http://en.wikipedia.org/wiki/MEMS_gyroscope (http://en.wikipedia.org/wiki/MEMS_gyroscope)