Test engineers use a HALT/HASS setup to accumulate fatigue, but the distribution of potential damage can vary. Live FDS is a method of estimating a table’s relative fatigue levels to help set a test duration, determine when to remove a test item from the table, and decide when to stop the test.

Live FDS software slideshow

Real-time Fatigue Measurement

Live FDS is a software option for monitoring fatigue accumulation in real-time. While the HALT/HASS machine is running, review the accumulating damage to map the table’s distribution or compare your test’s stress levels to a reference value. Live FDS answers the questions:

  • Where should I mount the product?
  • When should I remove a product from the table?
  • When should I stop the test?

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Map the Machine Table

Stress levels vary across the surface of a HALT/HASS machine table due to hammer configuration, repetition rate, and system resonances. Tailoring the table’s vibration spectrum is not realistic, and the frequency spectra and intensity are not consistent between machines.

With Live FDS, engineers can identify the best location to mount the product. If multiple products are on the table at once, they can monitor the fatigue accumulation and remove/replace products for equal exposure.

HALT/HASS machine table

Verify Test Profile Adequacy

Live FDS allows engineers to estimate the fatigue accumulation of the shaker table surface or test item during HALT/HASS.

In live or playback mode, they can compare the test’s stress levels to a reference value and confirm if the profile meets or exceeds the reference demand. The software uses a color scale for easy comparison and ensures adequate fatigue levels are achieved without over-testing, saving cost and time.

FDS C3(Z) vs E5(Z)-Control

Data Analysis Software

Live FDS is a feature of the ObserVIEW software. In ObserVIEW, view, edit, and analyze waveforms from recorded or live data. It features ultra-fast processing, flexible file compatibility, and a comprehensive interface. Additional features include:

  • Modal testing
  • Octave analysis
  • Order analysis
  • STAG (SoR test generation)
  • Shock response spectrum (SRS) analysis

Vibration Research products collage

The ObserVIEW software can be connected to all VR hardware including the VR9500, VR10500, and ObserVR1000.

Free Demo Software

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