A complete toolset dedicated to machinery diagnostics: rotating machine trains, transmissions, gears and roller bearings
- ShaftView
- Kinematics’ markers
- Levels & profiles 15
- Cepstrum
- Envelope demodulation
The FFTDiag software module enriches your NVGate FFT with powerful computations, graphs, markers and signal indicators. It offers a complete tool set for diagnostic purpose on steady-state or low speed variation machines.
TIME DOMAIN
First statistical indicators are extracted from the trigger blocks. Such levels easily indicate offset (DC), shocks/clicks (crest factor), maximum excursion (Pk, Pk-Pk) and the true RMS.
The shaftview plots transducers time series along the shaft axis. This representation simplifies angular position understatingshowing the actual rotor, shaft, pulley and gears mechanics.
The envelope demodulation and periodic markers measure the periodicity of shocks form roller bearings and rotating parts.
CORRELATIONS
The auto and cross-correlation are the right tools to identify a repeated or transmitted pattern in vibration or noise. Cross-correlation allows localizing the source position between 2 transducers.
Spectral Domain
The Cepstrum is a powerful tool which gathers each harmonics-set in one line. This technique enables the separation of multiple harmonic sets in one line each. Adapted to multi-shafts machines like gearboxes the Cepstrum makes such signatures clearer.
Based on an Excel description the kinematic marker helps in matching the significant frequencies with the machine parts. Applying on spectra and cross functions (FRF, Coherence) this live marker is a must for rotating machineries diagnostics.
