Subject:
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Re: Positioning
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 26 Jan 2000 20:08:43 GMT
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Viewed:
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790 times
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Hi Mark,
That was good. :^)
You're right. Robots aren't human. But I think we can take certain aspects
from living organisms and apply them to robotics. The trick is finding what to
include (an aerodynamic wing) and what to leave out (flapping) as we translate
from the natural world to the man-made world.
In the case of mapping, landmark systems avoid the "cumluative error problem"
that Carsten originally mentioned. Also, a landmark system has different
properties than a rotaion-based or time based system. For example, if the
landmark moves a little bit, the landmark system changes where it's going. The
other two methods don't. Is this a good thing? Well, it depends on what you're
trying to do. If you want your robot to "go over to the stereo and turn it on
with your IR port" than a landmark system may be a good solution because your
girlfriend may move your stereo a few feet next week. But the difficulty with
using a landmark system is FINDING the landmarks in the first place. Drawing
colors on the floor is one possible solution. Using sonar is another.
Proactively using a touch sensor on an arm is another. But if you can't find
landmarks, a landmark system won't do you any good.
But whatever solution is used, timing, rotation, landmark, the mapping code I
mentioned can store and replay the results.
http://www.geocities.com/Athens/Column/2507/SoftBricks.htm
David Leeper (generally tries to avoid religous wars)
In lugnet.robotics, Mark Geddes <mark@AudeSi.com> writes:
> I often wondered if a lot of robot development has been hindered by trying
> to emulate biological systems. Just look at the development of the airplane
> and how ridiculous some of the early "bird" planes looked.
>
> Just a thought...
>
> Mark Geddes
>
> hmmm... I wonder if I can get the RCX off the ground by flapping those
> orange wings fast enough... ;-)
>
> >
> >
> > David Leeper wrote:
> > >
> > > Hi Carsten,
> > >
> > > The other day I was trying to get to Target. I didn't know • where the store
> > > was, so I asked directions. I was told:
> > >
> > > <i>Go down the street to the second light and make a left, • go two more lights
> > > and its on the right.</i>
> > >
> > > Strange. There was no timing involved or counting the turns • of wheels, but I
> > > got there.
> >
> > OTOH, how many mid-course corrections did you make as you
> > walked down the
> > (linear, visible)
> > street to maintain the precise orientation when you reached the light?
> >
> > Landmarks work if they are universally visible, but not if
> > they are beyond the
> > apparent horizon.
> >
> > --
>
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Message is in Reply To:
 | | RE: Positioning
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| I often wondered if a lot of robot development has been hindered by trying to emulate biological systems. Just look at the development of the airplane and how ridiculous some of the early "bird" planes looked. Just a thought... Mark Geddes hmmm... I (...) (24 years ago, 26-Jan-00, to lugnet.robotics)
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