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IIR filter optimization tool.

One can generate the signal with a LF drift about zero, problem here is how to get rid of sucha a drift
It is also possible to read the signal from the file, nut just to simulate it
Then butterworth filter can be designed,process goes like this

After creating the filter one can see how butterworth parametars shape frequency and phase response
For signal created, or read from some file ... one can caluclate PSD and spectrogram or precdures as liste
Both signals, filtered and original one can be compared
Purpose: integration procedure introduces LF drift which HPF should remove
Neverthless, lowest frequencies are most important content of a signal, hence HPF must not damp it beyond the cutoff.
Those damping could bias the whole results, hence optimization has to be done

A procedure of signal integration like m/s²-> 1/[s]-> m/s-> 1/[s]-> always carries the LF drift

To briefly introduce the problem, here is how the signal usually looks after integration coming from [m/s]->[m]e-6

So the question is: how to supress the drift and not to touch the signal optimizing filter order and cutoff frequency
I have chosen butterworth IIR filter type, here as HP-IIR ( high pass infinite impulse response)

Obivously, if filter is not of HQ and optimized, whole x- axis can be suppresed, hence if x axis downscaled
whol results can take different range

So in order to see how the filter is going to affect the signal, this app has been created