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PICList Thread
'[OT] Air muscles'
2005\05\26@090904 by Russell McMahon

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Compact, high weight to force air powered "muscles" for robotics and
many other applications. Extremely simple principle - easily
replicated.

       http://www.shadow.org.uk/products/airmuscles.shtml

Not quite as good as they make out though. Their less than precise
force/action locus makes them more like a human muscle than eg a
pneumatic cylinder is. Still extremely useful though.


       RM


2005\05\26@104408 by Michael Rigby-Jones

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>-----Original Message-----
>From: spam_OUTpiclist-bouncesTakeThisOuTspammit.edu [.....piclist-bouncesKILLspamspam@spam@mit.edu]
>Sent: 26 May 2005 11:38
>To: PIC List
>Subject: [OT] Air muscles
>
>
>Compact, high weight to force air powered "muscles" for robotics and
>many other applications. Extremely simple principle - easily
>replicated.
>
>        http://www.shadow.org.uk/products/airmuscles.shtml
>
>Not quite as good as they make out though. Their less than precise
>force/action locus makes them more like a human muscle than eg a
>pneumatic cylinder is. Still extremely useful though.

I know a guy quite localy that has been doing a lot of robotics research
using these things.  Not much to them really, just a bit of what looks
like the grey braided cable looming and a rubber baloon.

Not convinced that pneumatics are ideal for mobile robots though, high
pressure air cylinders are bulky and heavy and not so easy to recharge
autonomously.  Although...I wonder how energy density compares to decent
battery technology?

Regards

Mike

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2005\05\26@114433 by Russell McMahon

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> Not convinced that pneumatics are ideal for mobile robots though,
> high
> pressure air cylinders are bulky and heavy and not so easy to
> recharge
> autonomously.  Although...I wonder how energy density compares to
> decent
> battery technology?

The highest possible gas pressurisation systems are exceeded in energy
density only by top battery chemistries. Chemical energy density is
still substantially higher than the best batteries (or fuel cells).


       RM

2005\05\26@115947 by Alan B. Pearce

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>The highest possible gas pressurisation systems are exceeded
>in energy density only by top battery chemistries.

Hmm, so is an exploding battery a "top battery chemistry" or a "highest
possible gas pressurisation" ;))))

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