User`s guide

1 Data Processing
ident
2 In the System Identification Tool window, select Import data > Freq.
domain data. This a ction opens the Import Data dialog box.
3 In the Data Format for S ignals list, select Freq. Function (Complex).
4 Specify the following options:
• Freq. F unc. —EntertheMATLABvariablenameoraMATLAB
expression that represents the com plex frequency-response data G(e
iw
).
• Frequency — E nter the MATLAB variable name of a vector or a
MATLAB expression that represents the frequency. The expression
must evaluate to a column vector.
• Data name — Enter the name of the data set, which a ppears in
the S ystem Identi fication Too l window afte r the import operation i s
completed.
• Frequency unit —Enter
Hz for Hertz or keep the rad/s default value.
• Sampling interval — Enter the actual sampling interval in the
experiment. For continuous-time data, enter
0. For more information
about this setting, see “Specifying t he Data Sampling Interval” on page
1-28.
5 (Optional) In the Data Information area, c lick More to expand the d ialog
box and enter the following optional settings:
Channel Names
• Input —Enterastringtospecifythenameofoneormoreinput
channels.
Tip Naming channels helps you to identify data in plots. For
multivariable input and output signals, you can specify the names of
individual Input and Output channels, separated by commas.
• Output —Enterastringtospecifythenameofoneormoreoutput
channels.
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