Systems which use resonance
Systems which use resonance
(OP)
Hi guys
I am busy with a proposal for my MSC, and struggling to find mechanical systems which use resonance in order to function or perform better. Looking for something whereby resonance is induced and maintained even when parameters are changed during operation.
A bit vauge but I would appreciate any information.
Note that my topic is on vibrating screens
I am busy with a proposal for my MSC, and struggling to find mechanical systems which use resonance in order to function or perform better. Looking for something whereby resonance is induced and maintained even when parameters are changed during operation.
A bit vauge but I would appreciate any information.
Note that my topic is on vibrating screens
RE: Systems which use resonance
Walt
RE: Systems which use resonance
RE: Systems which use resonance
> Shouldn't really mention this but the Las Vegas shooter used a form of resonance in the "bump stock" to make his semiautomatic rifle behave like an automatic
> There are other resonance-peaked systems, which I can't remember right now, that operate on resonance, since that minimizes the energy required
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
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RE: Systems which use resonance
RE: Systems which use resonance
Cheers
Greg Locock
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RE: Systems which use resonance
RE: Systems which use resonance
https://tnsmachines.com/wp-content/uploads/2016/01...
https://patents.google.com/patent/US2616288A/en
As of 2011 at least one of these machines was still in use by automotive legends.
RE: Systems which use resonance
https://vortexbladeless.com/download-green-paper/
The resonance is tuned to the vortex shedding frequency. Having maximum motion of the rod allows them to extract maximum energy from the vibration (energy extracted acts like damping).
Vortex shedding frequency changes with windspeed. Also the magnitude of oscillations increase with windspeed. So they arrange a permanent magnet in such a way that it stiffens the system as the magnitude of oscillation increases, which increases the resonant frequency that is supposed to allow natural frequency to follow close to the vortex shedding frequency (a passive tuning system to maintain resonance over a wider range of wind speeds). As an added benefit, the non-linear stiffening spring gives a resonance characteristic similar to a Duffing oscillatoro shaped like a shark fin... (the olive-colored one pointing to the right) which abruptly drops resonant frequency at high magnitudes... they take advantage of this (supposedly) to protect the machine from damage from excessive movement if the wind speed gets too high ... then you reach the right-most tip of the shark fin and then it detunes itself.
I should add the company has been in business a long time raising money from investors by showing their funny looking videos, but I'm not sure they have demonstrated very much performance yet.
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(2B)+(2B)' ?
RE: Systems which use resonance
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm
RE: Systems which use resonance
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Not making a decision is a decision in itself
RE: Systems which use resonance
Human vocal cords.