I would like help trying to filter a signal in my data.
Data studied is 'ecart real', if you zoom on a small area (using Diadem or other), you can see a cyclic signal of about 75 pulses period.
I would like to filter that big oscillation and keep the small variation.
You could pass this data through a software-based bandstop filter to remove the 75Hz noise. In an ideal case, you have to figure out what causes this noise and remove it at the hardware level.
Look like a relative displacement from the mechanical assembly. (This signal is a displacement)
Further investigation is necessary.
Could you refer some software? Hope to solve this displacement from the source too.