Subject:
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Re: turtle coding kit (Re: How would we (the rest of us) communicate ideas to the MDP?)
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 22 Feb 2006 14:53:51 GMT
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Viewed:
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2028 times
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In lugnet.robotics, Tim Rueger wrote:
> In lugnet.robotics, Steve Hassenplug wrote:
> > In lugnet.robotics, Mike Walters wrote:
> > > But, that doesn't mean that I wouldn't like to at least share my ideas. I
> > > imagine that everybody who is on the MDP will have plenty of their own ideas,
> > > but if we (the rest of us) had a place to just post suggestions and ideas, isn't
> > > it possible that it could lead to something good?
> > >
> > > I wonder if anybody knows. Do you think we'll just do it through lugnet or
> > > through a blog somehow?
> >
> >
> > Mike,
> >
> > You must already know over the last year, all of us have brought ideas from
> > LUGNET, and other sources into our MUP discussions.
> >
> > LEGO is smart enough to know they don't have all the answers, so they invited us
> > inside. We (MUPs) are smart enough to know we can't speak for everyone, so we
> > look at places where people are talking.
> >
> > I suspect there's a good chance you can post your ideas almost anywhere, and
> > someone will see them. I prefer LUGNET.
> >
> >
> > So, what sort of ideas are you talking about? Something you want to build?
> > Something to write? A contest? Personally, I'd love to hear about them all.
> >
> >
> > Just to give you a glimmer of hope, I believe the first people invited to
> > participate need to respond by today or tomorrow. You have to think at least
> > one of the 100 are on vacation, and your name is 101 on the list...
> >
> > Steve
>
> I'll chime in here (I lurk way too much):
>
> Given the choice, I'd like to see included in NXT
> a software module for coding dead-reckoning
> navigation for turtle-type robots, kind of like
> here:
>
> http://www.seattlerobotics.org/encoder/200108/using_a_pid.html
>
> But since the NXT motors have built-in encoders,
> the code would be much simpler. In fact, the inputs
> to the routines would be just the diameter of the
> wheels and their separation.
>
> With such a code module included in NXT, this
> would put just about all FLL teams using it
> on even footing for navigation. (Credit Evan
> Ryker, a member of my recent FLL team, for the
> sending me this excellent link. Apologies if
> it's been seen before here.)
>
> I'd be willing to develop this myself, but I
> consider myself an unlikely MDP member at this
> point.
>
> -Tim
Having given this a bit more thought, the code
would be almost the same. Even though the
encoders are built-in, there's no guarantee that
the motors themselves are matched. You would
still need control loops to ensure that the
motors rotate at the same average rate to travel
a straight line. At any rate...
As Mike just pointed out, if NXT is to be an
"iPod for robotics", I think this has to be
included, and be dead-on reliable. Then FLL
teams (and other roboticists, but let's face
it, "soccer dads" don't care about them) can
get on with the business of coding actual
robot behaviors instead of endlessly tweaking
one-shot navigation routines.
-Tim
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