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Subject: 
RE: Jumping 'bots?
Newsgroups: 
lugnet.robotics
Date: 
Thu, 18 Nov 1999 19:14:16 GMT
Original-From: 
Jim Thomas <JIM.THOMAS@TRW.avoidspamCOM>
Viewed: 
489 times
  
I remember that jumping robot but I think that it was more than 10 years
ago... I'm pretty sure I was in High School at the time.  If I had to guess
I would say 1984-1985 timeframe (or even older?).  Somewhat related I
remember seing a TV program in the 80's that showed a "dog" robot that could
walk/run on four legs.  The lower part of the legs were hydrolic pistons.
To move a leg it would retract the piston and then swing it into position.
It kindof bounced along as it ran (like Pepe LePeu).  It was really cool.
The computer was not on board, it had an umbilical cord.

JT

-----Original Message-----
From: Graham Stalker-Wilde [mailto:grahams@pipeline.com]
Sent: Thursday, November 18, 1999 9:47 AM
To: lego-robotics@crynwr.com
Subject: Re: Jumping 'bots?


In lugnet.robotics, lego-robotics@crynwr.com (Christian
Jacobsen) writes:

I have seen treaded robots, wheeled robots, walking robots, • and even flying
and bungee jumping RCX's...

...but I have not seen any "jumping" robots.  I am thinking • about something
with a frog-like action.

I remember a Scientific American article from a decade or so
back on walking
bots. (I'm now getting close the point where I'll be reading
the "25 Years
Ago" articles for the second time, looking forward to that.)
As I remember
they discussed hexapod motion at length, it being relatively
easy since you
can always have a stable tripod, and more or less skipped
quadrapedal and
bipedal motion, going straight to unipods.

The unipods were basically pogo sticks - the claim was that
once you give up
the stable tripod it's all about balance anyway, so unipods
are easier to get
working.

The bots moved by tilting forward, so the leg was behind
them, then jumping,
swinging the leg forward mid-air, landing and rebalancing.

I haven't tried this yet (my creations tend to disintegrate
when looked at
roughly), and the balancing may be beyond the RCX's
capabilities, but it's an
idea. Even if it needed trainer legs to rest on between
jumps, it'd still be
pretty cool.

-g




Message has 1 Reply:
  Re: Jumping 'bots?
 
(...) The Scientific American Unipod also had an off-board pewter. How about the related, simpler, problem of a balancing robot? It has one leg which is not stable by itself (rounded base, say). It has to balance on its leg, and recover from small (...) (25 years ago, 18-Nov-99, to lugnet.robotics)

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