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# use A / Control in the frequency domain combined with A / vibration

## use A / Control in the frequency domain combined with A / vibration

(OP)
I have a simple 1 DOF mass spring damper system. The mass is forced by a swept sine force (5-2000 Hz). I used A/Vibration and I found the charateristic behaviour of this kind of system with an acceleration peack in the resonance frequency. Now I want to add a closed loop control aimed to modulate the input force in order to maintain the mass acceleration to a required value (e.g. 1g). So I need to use A/Control in the frequency domain using as input of the Adams plant a vibration input channel and as output a vibration output channel. Someone can help me, is there any tutorial or guide useful to solve this problem?

Thanks, Vincenzo.

### RE: use A / Control in the frequency domain combined with A / vibration

Are you sure you want the controller to work in the frequency domain? That sounds like a typical feedback loop.

Anyway 4 examples are given in the controls folder, I'd have thought running them would be helpful. I use neither product so that's all i know.

Cheers

Greg Locock

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### RE: use A / Control in the frequency domain combined with A / vibration

(OP)
Yes I'm sure i need to work in the frequency domain, I need to sweep all the frequencies from 5 to 2000 Hz.
I have already seen all the examples but all are in the time domain.

I hope that someone can help me.

Cheers,
Vincenzo

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