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Lab 9: FTT and power spectra - Claremont Colleges
faculty.jsd.claremont.eduLab 9: FTT and power spectra The Fast Fourier Transform (FFT) is a fast and efficient numerical algorithm that computes the Fourier transform. The power spectrum is a plot of the power, or variance, of a time series as a function of the frequency1. If G(f) is the Fourier transform, then the power spectrum, W(f), can be computed as
Lab 9: Tensile Testing - Iowa State University
www.mse.iastate.eduStress, in metric system, is usually measured in N/m2 or Pa, such that 1 N/m2 = 1 Pa. From the experiment, the value of stress is calculated by dividing the amount of force (F) applied by the machine in the axial direction by its cross-sectional area (A), which is measured prior to running the experiment.