The Barrett scaling law is one of the oldest tools in the launch vehicle random vibration toolbox, and it is still one of the most used. It answers a question that comes up on every new program before a single accelerometer has been mounted: I… Read more
1. Band-Splitting 2. Time-Level Equivalence 3. PSD Synthesis using Sine Series PowerPoint Slides: webinar_41_psd_topics.pptx Audio/Visual File: NESC Academy PSD Special Topics – Recommend viewing in Firefox with Sliverlight Plugin * * * Matlab script: Vibrationdata Signal Analysis Package * * * Here is a brief guideline… Read more
Here is a paper. Estimating Fatigue Damage from Stress Power Spectral Density Functions: estimate_fatigue_psd.pdf Note that the duration for the example in the paper was 600 sec. * * * This following Matlab program calculates the cumulative rainflow fatigue damage for an input stress PSD… Read more
PowerPoint File: Webinar_16_VRS.pptx Audio/Visual File: NESC Academy VRS – Recommend viewing in Firefox with Sliverlight plugin * * * Python Version Webinar_16_VRS_python.pptx Python script: Python Signal Analysis Package GUI * * * PSD Data Files: webinar_16_data_files.mat webinar_16_data_files.zip * * * Reference Paper: An Introduction to the… Read more
PowerPoint File: webinar_15_SDOF_frequency_domain.ppt Audio/Visual File: NESC Academy SDOF_response_base_input_frequency_domain – Recommend viewing in Firefox with Sliverlight plugin * * * PSD Data File: navmat_spec.psd * * * Python webinar_15_SDOF_frequency_domain_python.pptx Python script: Python Signal Analysis Package GUI * * * Reference Papers: Equivalent Static Loads for Random Vibration link… Read more
There is an occasional need to compare the effects of two different power spectral density (PSD) base input functions for a particular component. This would be the case if the component has already been tested to one PSD but now must be subjected to a… Read more
PowerPoint File: Webinar_14_PSD_synthesis.pptx Audio/Visual File: NESC Academy PSD_synthesis – Recommend viewing in Firefox with Sliverlight plugin * * * PSD Data File: navmat_spec.psd * * * Matlab script: Vibrationdata Signal Analysis Package * * * Python Version Webinar_14_PSD_synthesis_python.pptx Python script: Python Signal Analysis Package GUI * *… Read more
PowerPoint File: Webinar_13_PSD_sdof_response.pptx Audio/Visual File: NESC Academy SDOF_Response_to_PSD_Input – Recommend viewing in Firefox with Sliverlight plugin * * * Reference Paper: Derivation of Miles Equation * * * Matlab script: Vibrationdata Signal Analysis Package * * * Python Version: Webinar_13_PSD_sdof_response_python.ppt Python script: Python Signal Analysis… Read more
PowerPoint File: Webinar_12_PSD_data.pptx Audio/Visual File: NESC Academy PSD data – Recommend viewing in Firefox with Sliverlight plugin Data: Taurus_auto.dat – Time(sec) & Accel(G) * * * Matlab script: Vibrationdata Signal Analysis Package * * * Python Version: Webinar_12_PSD_data_python.pptx Python script: Python Signal Analysis Package GUI * * *… Read more
PowerPoint File: Webinar_11_PSD.ppt The sample PSD specification is taken from: NAVMAT-P9492 Audio/Visual File: NESC Academy PSD – Recommend viewing in Firefox with Sliverlight plugin * * * Python Version: Webinar_11_PSD_python.ppt * * * Reference Papers: Integration of the Power Spectral Density Function Statistical Degrees-of-Freedom Power Spectral Density… Read more