The following Matlab scripts calculate the Fourier transform of a time history: fourier.zip The main script is: fourier.m The remaining scripts are supporting functions. * * * A Matlab GUI version is included in: Vibrationdata Matlab Signal Analysis Package * * * See also: Shock… Read more
The Matlab scripts vc_velox.zip calculate the one-third octave band velocity spectrum of a time history for comparison with ISO Generic Vibration Criteria for Vibration-Sensitive Equipment. The main script is: vc_velox.m The remaining scripts are supporting functions. The input file may either be an acceleration or… Read more
ISO 2631 Mechanical vibration and shock — Evaluation of human exposure to whole-body vibration * * * * Update: The ISO 2631 scripts have been added to the Matlab GUI package posted at: Vibrationdata Matlab Stand-alone Executable GUI Package * * * * The Matlab… Read more
The Matlab scripts in SPL.zip calculate the one-third sound pressure level for an acoustic pressure time history. SPL.m is the main script. The remaining scripts are supporting functions. The scripts have options for A, B & C-weighting. See also: Matlab Acoustic Page * * *… Read more
The Matlab scripts in waterfall_FFT.zip calculate the Waterfall FFT of a time history. The main script is: waterfall_FFT.m The remaining scripts are supporting functions. The scripts also have options for spectrogram and contour plots. Here is another script useful for tracking sine sweeps: sine_sweep_spectral.m *… Read more
The Matlab scripts in PSD.zip calculate the power spectral density function for a time history. The main script is: PSD.m The remaining scripts are supporting functions. * * * A Fortran power spectral density program is given at: PSD.F * * * See also: Matlab Random Vibration… Read more
The overall RMS level of a power spectral density function is equal to the square root of the area under the curve. Power spectral density specifications are typically given in log-log format. Thus special integration rules apply. The Matlab scripts in psd_integ.zip calculate the overall… Read more
This set of Matlab scripts calculates the response of a single-degree-of-freedom system to an acceleration power spectral density base input: sdof_ran.zip The power spectral density may vary arbitrarily with frequency. The main script is: sdof_ran.m The user must specify the natural frequency and damping ratio. The… Read more
Mark 9 [38] And John answered him, saying, Master, we saw one casting out devils in thy name, and he followeth not us: and we forbad him, because he followeth not us. [39] But Jesus said, Forbid him not: for there is no man which… Read more
The software in the zip file was updated on December 21, 2012. A time history consisting of a series of damped sinusoids can be synthesized to satsify a shock response spectrum (SRS). A Matlab script for this is given in: damped_sine_syn.zip. The main script is: … Read more