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Fundemetal Question regarding frequency response
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Posted by: bluejay

09/30/2006, 18:45:18

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If A physical system recieves a signal in a freuquency close to its resonance - it may gain a higher value of the output signal's amplitude.
If we look at the energy of such a wave then we can conclude that a system can magnify energy.. But then it doesn't make sense - because such a case means PMM2 (perpetual motion machine of the second kind).
How this dillema can be resolved?







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Re: Fundemetal Question regarding frequency response
Re: Fundemetal Question regarding frequency response -- bluejay Post Reply Top of thread Forum
Posted by: randykimball
Barney
10/02/2006, 17:29:09

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Take a closer look.

I don't know which, nor does it matter, which value increases in a concept, similar to the one you are chatting about, the fact is you can not create nor destroy energy. For example: If you incease current you must increase volts (energy pumped in) and/or decrease resistance.

Energy is always seeking a change of state, if allowed it will go somewhere seeking a null state. Ice will melt and continue to loose BTU's until the fluid reaches ambient temperature (and even then energy will continue drift in and out as the value of humidity, temperature, radiant heat, vibrations, etc vary). Machines use energy to change the state of energy, they do not create it.

When work is performed the energy just changes state, it does not come from a magic place. In a machine,some energy used to do work escapes in the forms of heat and friction, that energy at the very least must be replaced. We will continue top develope more and more efficent machines (less heat and friction losses) but I do not believe we will ever achieve no losses.

While your frequency or the amplitude may increase this system is still reliant on the energy from where ever it "receives a signal" from for energy. Something in the system lost in value or pulled in more energy to account for that increase in amplitude. As you reach "close to its resonance" frquency perhaps it just became more efficent or more selective. Now.. Did it truly increase in energy or does your measurement equiment show an increased amplitude because the harmonics decreased and the resonance frequency increased in amlpitude per scattered harmonic losses.

.. tuff to explain...Did I make that muddy enough...??





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Modified by randykimball at Mon, Oct 02, 2006, 17:34:11


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