Just had an idea. While working on stepper motor circuitry, I realized that a wheel is a different kind of resonator.
Imagine spinning a merry-go-wheel while standing. You move your hands back and forth to push the wheel around; this is the resonant action. However the frequency of this resonator increases as you put more energy in, making the wheel spin faster. There might be one pole on the wheel, or there may be 5, but it works just the same.
So here is an example where energy input directly results in increasing frequency. I wonder if this has anything to do with FRV?
Imagine spinning a merry-go-wheel while standing. You move your hands back and forth to push the wheel around; this is the resonant action. However the frequency of this resonator increases as you put more energy in, making the wheel spin faster. There might be one pole on the wheel, or there may be 5, but it works just the same.
So here is an example where energy input directly results in increasing frequency. I wonder if this has anything to do with FRV?