Generate stabilization diagram for modal analysis
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. Theith element contains a length-ivector of natural frequencies of stable poles. Poles that are not stable are returned asNaN
s. This syntax accepts any combination of inputs from previous syntaxes.
[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.