User`s guide

1 Data Processing
• Output —Enterastringtospecifythenameofoneormoreoutput
channels.
Physical Units of V ariables
• Input — Enter a string to specify the input units.
Tip When you have multiple inputs and outputs, enter a
comma-separated list of Input and Output units corresponding to each
channel.
• Output — Enter a string to specify the output units.
Notes — E nter comments about the experiment or the data. For
example, you might enter the experiment name, date, and a description
of experimental conditions. Models you estimate from this data inherit
your data notes.
5 Click Import.ThisactionaddsanewdataicontotheSystemIdentification
Tool windo w.
6 Click Close to close the Import D ata dialog box.
Specifying the Data Sampling Interval
When you import data into the GUI, you m ust specify the data sampling
interval.
The sampling interval is the time between successive data sam ples in your
experiment and must be the numerical time interval at which your data is
sampled in any units. For exam ple, enter
0.5 if y our data w as sampled every
0.5 s,andenter1 if your data was sampled every 1s.
You can also use the sampling interval as a flag to specify continuous-time
data. When importing continuous-time frequency domain or
frequency-response data, set the Sampling interval to
0.
The sampling interval is used during model estimation. For time-domain
data, the sampling interval is u sed together with the start time to calculate
thesamplingtimeinstants. Whenyou transform time-domain signals to
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