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With its dedicated structural mode, the FFT plug-in offers a comprehensive tool panel for FRF acquisition. Whatever the method used, impact testing with hammer or shaker excitation, FRFs are con?dently acquired.
Check the validity of the acquisition thanks to different displays and their preview:
• Frequency Response Function
• Coherence
• Trigger blocks
• Averaged results
Impact testing
• Adjust the settings using an appropriate weighted window if necessary: uniform, force/response, hanning…
• Accept /reject the impact hammer measurement after validity checking
• Hammer impact auto-range
• De?ne the measurement sets in advance and use the node path sequencer to track all measurement points
• The synchronous time domain averaging of impact signals allows acquiring the natural modes (FRFs, Coherence) of machinery without interrupting its operation (or any forced vibrations). This unique feature simplifies the natural resonance evaluation on diagnostic operations.
Shaker excitation with generators
For exciting a large structure, up to 6 shakers can receive signals from the generator outputs of the analyzer. In order to ? t the wide range of potential cases, a large series of excitation signal such as swept sine, chirp, random, etc. can be simultaneously generated. Any channel can be set as the reference which generates a multiple reference FRF and cross spectrum matrix.
All you need to run your factory !
