Random Testing

Random testing is standard in vibration analysis because random waveforms reflect real-world vibration. A random waveform is inherently irregular, non-deterministic, and non-repetitive. As a result, a measured point in time cannot be used to predict any point before or after. Therefore, a random waveform must be analyzed and understood from a statistical standpoint until the event occurs.

In this course, you will learn

• Calculating the power spectral density (PSD) to examine and analyze a random waveform
• Determining the PSD from the fast Fourier transform (FFT)
• Using filters, windowing, and averaging to adjust a digital sample and circumvent discontinuities
• Quantifying random signals using statistical measures and probability distributions
• Understanding product design applications such as tolerances and fatigue analysis