El_salinho
Aerospace
- May 25, 2024
- 1
We are conducting a shaker bench test on a satellite part and after checking the spectrogram we have noticed a noise every 50 Hz on several accelerometers.
Our grid is 50 Hz so we assume it may be something related to that, what is confusing is that it repeats at 100, 150, 200 etc.
It also became more noticeable later in the testing, after we have done already 2 axis.
We went back to check older data and the same issue appears but a lot more faint.
It also does not show in the FRF or PSD graphs, only in the spectrograms.
Does anyone know what else could be the reason, if the grid has really something to do with this and how/if we can filter those out?
Our grid is 50 Hz so we assume it may be something related to that, what is confusing is that it repeats at 100, 150, 200 etc.
It also became more noticeable later in the testing, after we have done already 2 axis.
We went back to check older data and the same issue appears but a lot more faint.
It also does not show in the FRF or PSD graphs, only in the spectrograms.
Does anyone know what else could be the reason, if the grid has really something to do with this and how/if we can filter those out?
