Use the fatigue damage spectrum to create an accelerated random PSD test profile from multiple files. Evaluate peak values and test acceleration with extreme response and shock response spectra.
Download Demo All Software FeaturesRandom Test Generation is a tool for creating accelerated vibration test control profiles that are the damage equivalent to a product’s lifetime use.
This tool processes multiple field-recorded data files with the fatigue damage spectrum (FDS), weighing the product’s different end-use environments based on their contribution to fatigue damage. It includes an extreme response and shock response spectra for evaluating test acceleration and peak levels.
ObserVIEW can export these test profiles to the VibrationVIEW control software, making it easy to navigate from analysis to shaker testing.
ObserVIEW’s Random Test Generation is a user-friendly experience for advanced processing.
Engineers can upload multiple files to a project or segment indivdual waveforms into analysis ranges. Random Test Generation organizes the data ranges/files into “Vibration Groups” to represent the different vibration environments—e.g., highway, gravel, and city environments, x, y, and z axes, etc.
Random Test Generation includes an extreme response spectrum (ERS) trace to validate the test acceleration factor. ObserVIEW can process one or multiple PSD files to create a composite ERS.
Example Uses
Multimedia Sync syncs media files with time-waveform recordings. Engineers can segment a single file using GPS-correlated data to define analysis ranges for test development.
Peak acceleration levels pose the highest risk for product damage. ObserVIEW’s fatigue damage settings include Kurtosion® Time Compression, which raises a vibration signal’s kurtosis above the Gaussian value of 3, increasing time spent at peak levels.
Kurtosion distributes damage across the fatigue spectrum rather than concentrating it at high frequencies. Engineers can adjust the kurtosis parameter to spend more time at potentially damaging levels and select the transition frequency for precise control.
The result is a test profile with faster, more representative damage compared to Gaussian tests.
With the Random Test Generation software, engineers can create a random PSD test profile that is the damage equivalent to weighted time-history files from the product’s end-use environment. They can also compare multiple test failures, compare specifications to real-world data, and determine if current testing is valid (or over/under).
