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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 confidently 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
• Define 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 fi 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.
Excel based acquisition route and settings (Sequencer)Accept/reject after averaging FRFs & CoherenceTrue Zoom on X-function up to 128 times25 601 lines real-time resultsTime domain averaged X-functionsMulti-mode generators: Sine, Swept, Step, Random, Multi-sine, Chirp, WavSmooth change generators: Phase & amplitude ramps, emergency shut-downHigh resolution generators: 10 µHz from 100 µHz to 40 kHzUp to 320+ channels real-time acquisition (analysis + recording)
All you need to run your factory !
