modalsd
Generate stabilization diagram for modal analysis
Description
modalsd(
generates a stabilization diagram in the current figure.
frf
,f
,fs
)modalsd
estimates the natural frequencies and damping
ratios from 1 to 50 modes and generates the diagram using the least-squares
complex exponential (LSCE) algorithm. fs
is the sample
rate. The frequency, f
, is a vector with a number of
elements equal to the number of rows of the frequency-response function,
frf
. You can use this diagram to differentiate between
computational and physical modes.
modalsd(
specifies
options using name-value pair arguments.frf
,f
,fs
,Name,Value
)
returns a cell array
of natural frequencies, fn
= modalsd(___)fn
, identified as being stable
between consecutive model orders. The ith element contains a
length-i vector of natural frequencies of stable poles.
Poles that are not stable are returned as NaN
s. This syntax
accepts any combination of inputs from previous syntaxes.
Examples
Input Arguments
Output Arguments
References
[1] Brandt, Anders. Noise and Vibration Analysis: Signal Analysis and Experimental Procedures. Chichester, UK: John Wiley & Sons, 2011.
[2] Ozdemir, Ahmet Arda, and Suat Gumussoy. "Transfer Function Estimation in System Identification Toolbox™ via Vector Fitting." Proceedings of the 20th World Congress of the International Federation of Automatic Control, Toulouse, France, July 2017.
[3] Vold, Håvard, John Crowley, and G. Thomas Rocklin. “New Ways of Estimating Frequency Response Functions.” Sound and Vibration. Vol. 18, November 1984, pp. 34–38.
Version History
Introduced in R2017a