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Random on random

Random on random

Random on random

(OP)
I have a vibration spec where a "floor level" broadband random data is given. Additionally 5 narrowbands are given with frequency data and PSD. For each narrowband a Sweep Bandwith (SB) is defined. For example for narrowband 1 a PSD level is given for 20, 40, 60, 80 and 100 Hz with SB 5. I assume each of the frequencies given is then the center frequency for each band. So with SB 5 the first RoR bandwith would be from 17.5 to 22.5 Hz, the second from 37.5 to 42.5 Hz. and so on. Is this correctly understood?

Thanks for any help

RE: Random on random

That looks like some milspec for engine type vibration. I don't know if your interpretation is correct.

Cheers

Greg Locock

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RE: Random on random

Agree with Greg....what are you measuring vibrations on?

RE: Random on random

That's something where you need to have your customer clarify what they mean.  It's ambiguous and can be interpreted different ways.

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