New software can provide a power spectral density estimation in a fraction of the time of traditional methods It is vital that a random test consistently meets power spectral density (PSD) requirements throughout. By its nature, random averaging requires time to present in-tolerance and smooth spectral lines. Vibration Research has a newly developed method of PSD estimation, Instant Degrees of Freedom (iDoF), which provides an accurate and smooth PSD estimate without requiring traditional averaging time. This is the best method available to ensure that a random vibration test meets PSD requirements throughout.
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