About PSD definition and practical meaning

[serdart]

Hi everyone,

Can anyone recommend any useful and especially "basic" document or web page about Power Spectal Density in mechanical vibrations?


Thx

 

[Twoballcane]

A great book to start with is Vibration Analysis for Electronic Equipment by David Steinberg. He has a great chapter on random vibration.

Tobalcane
"If you avoid failure, you also avoid success."

 

[GregLocock]

The FAQ section for this forum includes links to various online resources, specifically in your case I recommend the Agilent intro, and the B&K site.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

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[izax1]

I have found a newsletter from Lansmont very useful and easy to understand.

http://www.lansmont.com/Newsletters/HTML/1996-02-p3.HTM

 

[drmuh]

I think this website has many information

http://www.vibrationdata.com/random.htm

http://www.novosim.com

Product Development Services (cad/cae/test)
Medical Device R&D

 

[electricpete]

A quick comment from my perspective. If we are looking at machinery vibration we usually look at spectra. Occasionally we refer to a "raised noise floor". How high is the noise floor on a spectra depends on the bin width.... so not too easy to quantify from a normal spectra. PSD would be more helpful for quantifying broadband energy typically referred to as "raised noise floor" since it is energy per frequency bandwidht.... therefore independent of binwidth selected.

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[pierluk]

I'm searching the same information. I have found this interesting pdf

http://cp.literature.agilent.com/litweb/pdf/5952-8898E.pdf

 

[Tunalover]

The nomenclature "Power" Spectral Density is a misnomer. It really has nothing to do with power. A better description is Acceleration Spectral Density.

Bruce aka Tunalover

 

[izax1]

That is if it is accelerations you are after. It could just as well be velocities, displacements or even Force for that matter. Yes, it is important not get confused by "Power".