Backgrounder on this effect in dynamic systems …
Many systems exhibit oscillatory behavior when they are disturbed from their position of static equilibrium. A mass suspended from a spring, for example, might, if pulled and released, bounce up and down. On each bounce, the system tends to return to its equilibrium position, but overshoots it.
So you can be trying to damp down a system but as the system overall responds negatively (red line) there can be short periods where the system is responding positively (green lines)….
If you only sampled derivatives at the times where the green lines are you might think that your damping function wasn’t working…
Same thing can happen oppositely in amplification:
Anyway you have to be mindful in your time domain analysis…
Then you have the unqualified Art Degree morons say “stability creates instability!” or some other paradoxical nut job statements and these people are in charge… go figure…
5 comments:
This this apply to the art of 'doubling down'?
I suppose the technical term for 'doubling down' is reinforcing harmonics...
Could be but I’m not going to claim to understand how the Art Degree brain works…
I can just see the results..,
On gravel roads with wash-boarding... if you drive at the right speed, you float.
If not, your vehicle shakes itself apart.
Basic sampling theory. You have to filter your signal first to ensure your signal doesn't have significant energy content at frequencies above 1/2 of your sampling rate.
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