Subject:
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Re: Bump switches and "aggression"
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 3 Dec 2003 17:33:34 GMT
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Original-From:
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Jim Choate <RAVAGE@EINSTEINsaynotospam.SSZ.COM>
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Viewed:
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1905 times
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On Wed, 3 Dec 2003, Gordon Elliott wrote:
> An interesting anicdote on rabbit behavior: A friend's dog was apparently
> quite intelligent and knew the rabbit's hole's positions. Dog spied the
> rabbit, rabit the dog. Rabbit moved diagonally away from the hole,
> initially, BUT the dog headed not toward the rabit but toward the hole. Then
> rabbit turned and ran toward his hole, and dog was rapidly catching up to
> cut off, having apparently guessed future behavior.
You should watch my three dogs hunt. If all you've ever seen is a single
dog hunt then you know nothing of how dogs actually hunt. They're pack
animals, a single dog can't survive in the wild more than a few weeks. Yet
three sub-200lb dogs can take a 1,000+ lb Elk down.
> Now direclty on bump sensor vs. other senses: If moving in a particular
> direction, and robot had _directioal_ bump sensors,
There's the fundamental difference there is -no- reason to have
directional bump sensors. If you are moving along a path and a bump sensor was
hit that is all you need to know to change your path. You don't need to
know in which direction. An Ameoba would be a good example.
> is decoupled from simple side swipe trigger, and certainly in all sides not
> in its 'forward' direction of the moment) would be a "surprise" and could
> reasonably trigger flight behavior.
Bumps in the forward direction need to trigger 'flight' as well, otherwise
you're stuck. Rather contrary to the purpose of the design.
> But Jim, in other threads (that happen for example to deal with complexity
> and emergent behavior issues) you have been quite a contrarian.
I disagree big deal. What is telling is your emotional response to it by
making the discussion personal (and I think unprofessional) by making it a
ad hominim issue.
> Argumentative answers were given that seemed to redefine terms as you chose,
I have redefined zero terms.
Put up or shut up.
If anyone is a contrarian it is you, your action of taking a technical
discussion into a personal one is primary evidence to that end.
Have a nice day.
-- --
Open Forge, LLC 24/365 Onsite Support for PCs, Networks, & Game Consoles
512-695-4126 (Austin, Tx.) help@open-forge.com irc.open-forge.com
Hangar 18 Open Source Distributed Computing Using Plan 9 & Linux
512-451-7087 http://open-forge.org/hangar18 irc.open-forge.org
James Choate 512-451-7087 ravage@ssz.com jchoate@open-forge.com
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Message has 3 Replies:
 | | Re: Bump switches and "aggression"
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| ----- Original Message ----- From: "Jim Choate" <ravage@einstein.ssz.com> (...) was (...) ## The original request was to catalog opinions on bump sensors, a "state of the art". Remember the original question was: ** ... and I'm curious if anyone (...) (21 years ago, 3-Dec-03, to lugnet.robotics)
| | | Re: Bump switches and "aggression"
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| (...) <snip> (...) <snip> I'm very new to this particular thread, but I like Gordon's approach--directional sensors are needed. If I'm travelling forward and something bumps me from behind, I need to know that--If my conditional response is to do (...) (21 years ago, 3-Dec-03, to lugnet.robotics)
| | | Re: Bump switches and "aggression"
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| (...) That's nonsense! You are working on the very naive assumption that nothing in the environment is moving except your robot. If your strategy is to reverse direction when the robot bumps into something in *any* direction - then things will go (...) (21 years ago, 4-Dec-03, to lugnet.robotics)
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Message is in Reply To:
| | Re: Bump switches and "aggression"
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| ----- Original Message ----- From: "Jim Choate" <ravage@einstein.ssz.com> To: <lego-robotics@crynwr.com> ... (...) think (...) ### I think this is an interesting question, relating to complexity and emergent and evolutionary behavior which has been (...) (21 years ago, 3-Dec-03, to lugnet.robotics)
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