What is the PSD of Random Vibration?


Author Jared Van Baren

Random vibration testing uses the power spectral density (PSD) for test development and data analysis. The PSD graph displays resonances and harmonics that are hidden in a time-history waveform. In practice, generating a PSD is often the first step in examining and analyzing a random waveform.

Each word of the PSD acronym—power, spectral, and density—represents an essential component of PSD analysis. This webinar addresses these fundamentals and describes the process of PSD calculation. It also discusses test settings that affect PSD analysis and the underlying statistics of random vibration.

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