RMS in vibration analysis
RMS in vibration analysis
(OP)
Hi (and sorry for my english..)
I have to analyze 2 graphs returned by a vibrometer; there's time on the x-axis, and, on the y axis, peak and RMS respectively (see graph in attachment). But RMS isn't Root Mean Square? Shouldn't it be a number (and not a function of time)?
I have to analyze 2 graphs returned by a vibrometer; there's time on the x-axis, and, on the y axis, peak and RMS respectively (see graph in attachment). But RMS isn't Root Mean Square? Shouldn't it be a number (and not a function of time)?





RE: RMS in vibration analysis
However there is one complication. Clever engineers sometimes use peak hold instead of ensemble averaging, in which case there is no fixed relationship between the two, tho peak >= ensemble.
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: RMS in vibration analysis
RE: RMS in vibration analysis
(I don't know if I've understood your question).
RE: RMS in vibration analysis
Interesting data you have there. I wonder what it looks like in the frequency domain.
Greg, I am not sure what you mean by peak hold? If it means that we simply hold the peak value of the time response then I am not sure how this can help you. Maybe you can enlighten me.
Fe
RE: RMS in vibration analysis
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: RMS in vibration analysis
RE: RMS in vibration analysis
Fe
RE: RMS in vibration analysis
- Steve
RE: RMS in vibration analysis
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: RMS in vibration analysis
Walt
RE: RMS in vibration analysis
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.