Laplace feedback controller

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Tinkerz1

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If I what to find the low mid and high frequencies from continuous data, what would be the best solution.

I am using FFT but that is discrete time, I feel I miss the information in the time stamps.

Would the continuous fourier transform be better?

And if I want to implment a control loop on it would laplace work on continuous and discrete?

Tinkerz
 

Hi Tinkerz1
First of all you wrote
I am using FFT but that is discrete time, I feel I miss the information in the time stamps.
Click to expand...
As far as information content is concerned, if the sampling time meets Nyquist Criterion, then no information is lost during transformation of continuous time signal to discrete time.
In fact DFT (or FFT) is the only tool that a computer can compute and you can visualize the spectrum of the signal. If you want to increase the resolution of signal then take more points FFT.
Secondly
And if I want to implment a control loop on it would laplace work on continuous and discrete?
Click to expand...
Laplace is for continuous time and Z transform is for discrete time. You can find H(s) or H(z) from H(z) and H(s) respectively by various methods like impulse invariance, step invariance etc.
 

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