Subject:
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RE: Looking for correct terminology
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 25 Jul 2002 18:45:24 GMT
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Reply-To:
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<rhempel@bmts*spamcake*.com>
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Viewed:
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1026 times
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Dean,
After looking at the Androbot, I *finally* figured out
what is going on here. At first glance, it looks like the
robot has some extra camber - well, a LOT of camber.
But what is it doing, exactly?
In a normal robot the wheels that go straight up
and down. Without a dynamic stabilizing function, the
robot simply tips over because its center of gravity
is ABOVE the axis of rotation.
With your new configuration, as the robot tips away
from the vertical, the pivot point moves FARTHER from
the vertical than the center of gravity. When you
let go of the robot, it tries to right itself...
Am I right, or wayyy off the mark?
I'd call it the Weeble platform.
<http://www.yesterdayland.com/popopedia/shows/toys/ty1088.php>
Cheers, Ralph
> I see I haven't succeeded in describing the information I am looking for. I
> know what camber is. I work for a company that makes equipment for testing
> vehicle suspension kinematics, compliance, performance and durability. I
> spent the last three years designing and building an aircraft tire testing
> machine, and am currently involved in building testing equipment for
> automotive racing teams who have more money than is good for them. In short
> I probably know more about tires and wheels than 99% of the population
> (though at my workplace I am a relative idiot).
>
> I got a good lead from Rob Limbaugh. He gave me a web link to a site about
> Androbot robots (http://www.geocities.com/SiliconValley/Heights/8970). My
> robot is alot like TOPO or B.O.B. except that the wheels are cambered inward
> instead of outward. I am wondering anyone knows of a common use name for
> this kind of motion platform.
>
> Thanks for any help,
>
> Dean Hystad
>
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Message has 1 Reply:
 | | Re: Looking for correct terminology
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| (...) Ralph, You are correct sir. By keeping the CG near the ground and having such aggressive camber, my robot is actually quite stable. It uses the big 81mm balloon tires at about -75 degrees of camber and will recover from being tipped forward or (...) (22 years ago, 25-Jul-02, to lugnet.robotics)
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Message is in Reply To:
| | Re: Looking for correct terminology
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| (...) I see I haven't succeeded in describing the information I am looking for. I know what camber is. I work for a company that makes equipment for testing vehicle suspension kinematics, compliance, performance and durability. I spent the last (...) (22 years ago, 25-Jul-02, to lugnet.robotics)
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