I've used Welche's method on a vibration signal to get the averaged FFT which I want to used to calculate the PSD from which I can calculate the RMS.
Within the Welche method i've use Hann window with zero overlapping. The following post states, that using windowing couses distortion in the energy, which has effect on the RMS: https://community.sw.siemens.com/s/article/window-correction-factors .
However not using windowing might lead to spectral leakege.
My question is, that what is the correct way of dealing with this problem? Shall I use uniform windowing, or shall I use correction factors on the FFT?