Re: Electrostatic actuators to move robots legs...

From	Jasen Betts <usenet@revmaps.no-ip.org>
Newsgroups	sci.electronics.design
Subject	Re: Electrostatic actuators to move robots legs...
Organization	JJ's own news server
Message-ID	<vcdomi$3sb5p$1@gonzo.revmaps.no-ip.org> (permalink)
References	<vbtshm$4pvr$1@solani.org> <vbud7q$6hpt$1@dont-email.me>
Date	2024-09-18 05:33 +0000

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On 2024-09-12, Cursitor Doom <cd999666@notformail.com> wrote:
> On Thu, 12 Sep 2024 05:00:38 GMT, Jan Panteltje wrote:
>
>> Artificial muscles propel a robotic leg to walk and jump:
>>  https://www.sciencedaily.com/releases/2024/09/240909113111.htm
>> 
>> quote:
>>  "
>>  The actuators are oil-filled plastic bags, similar to those used to
>>  make ice cubes.
>>  About half of each bag is coated on either side with a black electrode
>>  made of a conductive material.
>>  Buchner explains that "as soon as we apply a voltage to the electrodes,
>>  they are attracted to each other due to static electricity.
>>  ...
>>  "
>> And press the fluid out....
>> So electrostatic actuators!
>
> How does that not violate thermodynamics? You seem to be getting useful 
> power from zero energy.

as the actuator moves the capcitance increases, and thus the stored electrical
energy (Q^2/2C) decreases.


-- 
 Jasen.
 🇺🇦 Слава Україні

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Thread

Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-12 05:00 +0000
  Re: Electrostatic actuators to move robots legs... Cursitor Doom <cd999666@notformail.com> - 2024-09-12 09:45 +0000
    Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-12 10:27 +0000
    Re: Electrostatic actuators to move robots legs... Jeff Layman <Jeff@invalid.invalid> - 2024-09-12 11:34 +0100
      Re: Electrostatic actuators to move robots legs... Jeroen Belleman <jeroen@nospam.please> - 2024-09-12 14:43 +0200
        Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-13 04:49 +0000
          Re: Electrostatic actuators to move robots legs... Jeroen Belleman <jeroen@nospam.please> - 2024-09-13 12:14 +0200
            Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-13 11:57 +0000
              Re: Electrostatic actuators to move robots legs... Jeroen Belleman <jeroen@nospam.please> - 2024-09-13 21:07 +0200
          Re: Electrostatic actuators to move robots legs... Chris Jones <lugnut808@spam.yahoo.com> - 2024-09-13 20:55 +1000
            Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-13 11:38 +0000
              Re: Electrostatic actuators to move robots legs... Jeroen Belleman <jeroen@nospam.please> - 2024-09-13 20:40 +0200
                Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-14 05:55 +0000
                Re: Electrostatic actuators to move robots legs... Cursitor Doom <cd999666@notformail.com> - 2024-09-14 13:17 +0000
                Re: Electrostatic actuators to move robots legs... liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2024-09-14 18:46 +0100
                Re: Electrostatic actuators to move robots legs... Cursitor Doom <cd999666@notformail.com> - 2024-09-14 19:20 +0000
                Re: Electrostatic actuators to move robots legs... john larkin <JL@gct.com> - 2024-09-14 19:49 -0700
                Re: Electrostatic actuators to move robots legs... Jeff Layman <Jeff@invalid.invalid> - 2024-09-15 08:13 +0100
                Re: Electrostatic actuators to move robots legs... Cursitor Doom <cd999666@notformail.com> - 2024-09-15 09:58 +0000
                Re: Electrostatic actuators to move robots legs... liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2024-09-15 11:21 +0100
                Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-15 11:00 +0000
                Re: Electrostatic actuators to move robots legs... Jeff Layman <Jeff@invalid.invalid> - 2024-09-15 11:38 +0100
                Re: Electrostatic actuators to move robots legs... Nick Hayward <nhayward8990@protonmail.com> - 2024-09-15 17:12 +0000
                Re: Electrostatic actuators to move robots legs... Jeff Layman <Jeff@invalid.invalid> - 2024-09-15 19:10 +0100
                Re: Electrostatic actuators to move robots legs... john larkin <JL@gct.com> - 2024-09-15 12:21 -0700
                Re: Electrostatic actuators to move robots legs... Bill Sloman <bill.sloman@ieee.org> - 2024-09-16 18:03 +1000
                Re: Electrostatic actuators to move robots legs... john larkin <JL@gct.com> - 2024-09-15 12:11 -0700
                Re: Electrostatic actuators to move robots legs... Bill Sloman <bill.sloman@ieee.org> - 2024-09-16 17:54 +1000
                Re: Electrostatic actuators to move robots legs... Jeroen Belleman <jeroen@nospam.please> - 2024-09-14 19:50 +0200
                Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-15 05:51 +0000
                Re: Electrostatic actuators to move robots legs... john larkin <JL@gct.com> - 2024-09-14 11:21 -0700
                Re: Electrostatic actuators to move robots legs... Jeroen Belleman <jeroen@nospam.please> - 2024-09-14 21:49 +0200
                Re: Electrostatic actuators to move robots legs... Joe Gwinn <joegwinn@comcast.net> - 2024-09-15 18:41 -0400
    Re: Electrostatic actuators to move robots legs... Jasen Betts <usenet@revmaps.no-ip.org> - 2024-09-18 05:33 +0000
  Re: Electrostatic actuators to move robots legs... john larkin <jl@650pot.com> - 2024-09-13 12:56 -0700
    Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-14 05:56 +0000

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