Subject:
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Re: Need to compare
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 28 Sep 2002 18:35:36 GMT
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Original-From:
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Vincent Raman <VINCENT.RAMAN@ULBihatespam.AC.BE>
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Viewed:
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586 times
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Thanks,
Yes, it's the maximum dimensions...
We have already seen the shrimp and we think to build something like that
(maybe also with tri-star wheels)... But if somebody find a better solution,
because we don't know the comportement of the shrimp with a little hole on
the ground. A whole just large enouh to "keep" a wheel...
But the trouble is that we can exclude all other possibilty without
arguments! Just saying "That's we need" is not enough...
Why exclude caterpillars, legs?
For the step, it begins at 1cm and it will be increased until no véhicule is
able to climb this step...
Vincent
----- Original Message -----
From: "Steve Baker" <sjbaker1@airmail.net>
To: "Vincent Raman" <Vincent.Raman@ulb.ac.be>
Cc: "Mailing list robotique" <lego-robotics@crynwr.com>
Sent: Saturday, September 28, 2002 7:01 PM
Subject: Re: Need to compare
>
>
> Vincent Raman wrote:
> > Thank you for your idea... but I forgot to say you that I have • restriction
> > for the dimensions...
> >
> > Dimensions : height : 30cm
> > Lenght : 60cm
> > width : 30cm
>
> Is that the *initial* dimensions - or the *maximum* dimensions?
>
> If it's just one of those things like "the robot must start off in a
> box no bigger than 30x60x30" - then it can just fold itself up into
> that space when they are doing the measuring - and stretch it's
> legs outwards after the start.
>
> Climbing a standard step (which is about 20cm) with a 30cm tall robot
> seems pretty tricky to me.
>
> Something like the "Shrimp" might do it...but the requirement to move
> along a surface that's higher on one side than the other would be hard
> for a Shrimp to manage.
>
> I think the idea of a long legged robot would be the answer...especially
> if the rules allow it to start off folded up into the 30cm height limit
> and then stretch out to (say) twice that size to give it a chance to
> climb a 20cm step.
>
> > And we can have 620 Euro's...
>
> So that's about US$620...that's quite a generous limit!
>
> That'll buy quite a bit of Lego (at US prices) - so you could certainly
> consider a dual-RCX design with a butt-load of Pneumatics (unless Lego
> is vastly expensive in your part of the planet).
>
> ----------------------------- Steve Baker -------------------------------
> Mail : <sjbaker1@airmail.net> WorkMail: <sjbaker@link.com>
> URLs : http://www.sjbaker.org
> http://plib.sf.net http://tuxaqfh.sf.net http://tuxkart.sf.net
> http://prettypoly.sf.net http://freeglut.sf.net
> http://toobular.sf.net http://lodestone.sf.net
>
>
>
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Message has 1 Reply:
 | | Re: Need to compare
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| (...) Oh - that's a pain. (...) Well, I guess it depends on how rough the terrain in general is. If it's a flat, smooth surface with just one 5cm hole - then practically any vehicle with (say) 6 wheels will drive across it like it wasn't there. (...) (22 years ago, 28-Sep-02, to lugnet.robotics)
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Message is in Reply To:
| | Re: Need to compare
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| (...) Is that the *initial* dimensions - or the *maximum* dimensions? If it's just one of those things like "the robot must start off in a box no bigger than 30x60x30" - then it can just fold itself up into that space when they are doing the (...) (22 years ago, 28-Sep-02, to lugnet.robotics)
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