ARTeMIS Modal - Frequency Domain Decomposition - FDD / EFDD / CFDD
includes up to three frequency domain modal analysis techniques derived from the
patented Frequency Domain Decomposition technology utilizing the singular value
decomposition of the estimated spectral densities of the measured response. The
techniques available are:
Decompostion - FDD
Domain Decompostion - EFDD
Frequency Domain Decompostion - CFDD
All three techniques
are based on peak-picking in the frequency domain using either
automatic picking or manual picking using the mouse. Once picked,
the mode shapes are ready for immediate animation. The techniques
are all specially designed to account for the presence of
deterministic signals (harmonics) in case of rotating structural
parts or other sinusoidal excitation.
The benefits of these
Intuitive modal parameter estimation
based on peak-picking in frequency domain.
Immediate results even in case of
hundreds of measurement channels and modes.
Extremely robust being based on the
Singular Value Decomposition of spectral densities.
Handles single or
multiple Test Setups in exact same way.
Through the use of
the powerful statistical harmonics detection modal parameters
can be extracted in the presence of deterministic (harmonic)
signals from e.g. rotating machinery.
be made manually or automatic.
EFDD and CFDD
methods provide estimates of damping ratios as well as improved
estimates of natural frequencies and mode shapes. These methods
are available in the ARTeMIS Modal Pro and ARTeMIS Modal STD