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POWER SPECTRAL DENSITY UNITS: [ Revision B By Tom Irvine
vibrationdata.comIntroduction Random vibration can be represented in the frequency domain by a power spectral density function. The typical units are acceleration [G^2/Hz] versus frequency [Hz]. The acceleration can also be represented by metric units, such as [ (m/sec^2)^2 / Hz ]. Note that the amplitude is actually [ GRMS^2 / Hz ], where RMS is root-mean-square.
RANDOM VIBRATION—AN OVERVIEW by Barry …
www.emtengineering.com2 of 15 INTRODUCTION Random vibration is somewhat of a misnomer. If the generally accepted meaning of the term "random" were applicable, it would not be possible to analyze a system