Alt-BEAM Archive
Message #04795
To: beam@sgiblab.sgi.com
From: John A. deVries II zozzles@lanl.gov
Date: Tue, 22 Jun 1999 19:23:22 -0400
Subject: Ah! Blessed Skepticism! (was: Re: Feedback explained?)
> At 03:33 AM 6/22/99 , Ben Hitchcock wrote:
> >True, for CONSTANT battery voltages. But what happens if the walker is
> >happily walking away, and in the middle of a step.
> ...
> >Let's say it decreases to 2.8 volts. (That's a bit exaggerated, but it
> >serves to illustrate a point.)
>
> All this argumentation is pointless. I find it ironic that once "implex"
> as a mechanism was deprecated because motor drivers tend to isolate the
> motor from the nervous net, this "battery droop" hypothesis has come into
> vogue and is being held onto for dear life.
>
> HAS ANYONE
> ACTUALLY MEASURED IT?
>
> Ok, sure, people have -some- sort of qualitative observations indicating
> that a nervous net robot acts differently when a leg is stuck than when
> they the legs are free, but NO ONE seems to have made any repeatable
> experiments that either support or deny any particular hypothesis.
>
> Until someone comes up with quantitative, repeatable measurements, I'm not
> going to -believe- in any hypothesis as a "theory".
>
>
> Zoz
>
>
> ---------------------------------------------------------------
> John A. deVries II
> zozzles@lanl.gov
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