Subject:
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Re: Why Java for Robots (was NXT and bluetooth enabled phones)
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 18 Jan 2006 06:55:11 GMT
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Original-From:
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Mr S <szinn_the1@yahoo.comNOSPAM>
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Viewed:
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1642 times
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--- PeterBalch <PeterBalch@compuserve.com> wrote:
> What is a robot sitting on Mars to do if it gets an
> "out of memory" or
> "illegal pointer value" or "array bounds exceeded"
> error? The first two
> should never ever happen in a robot. The last should
> have been caught by
> the compiler.
>
> Counter arguments please ...
Peter, I know that its not quite the same thing, but
the robotic space vehicle DeepSpace 1 was to use
visual navigation and rendevouz with an asteroid. The
light wasn't good enough, and being 300+ miles off
course at the final approach, command/control uploaded
an emergency navigation change... when they over-rode
the navigation system, the onboard computer (blue
screened?) rebooted and came up in safe mode!! Then
command/control hastily rewrote code, uploaded, and
got it all done for the rendevouz... but the camera
was pointed the wrong way!! Instead of a bunch of 1024
pixel images, they got one 9 pixel image looking
backwards after having passed the asteroid.
The answer to your question? .... "Phone home!"
S
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