最新のリリースでは、このページがまだ翻訳されていません。 このページの最新版は英語でご覧になれます。
System Identification | Identify models of dynamic systems from measured data |
Estimate Frequency-Response Models in the App
You must have already imported your data into the app and performed any necessary preprocessing operations. For more information, see データの準備.
Estimate Frequency-Response Models at the Command Line
You can use the etfe
, spa
, and spafdr
commands
to estimate spectral models. The following table provides a brief
description of each command and usage examples.
What is a Frequency-Response Model?
A frequency-response model is the frequency
response of a linear system evaluated over a range of frequency values.
The model is represented by an idfrd
model
object that stores the frequency response, sample time, and input-output
channel information.
Data Supported by Frequency-Response Models
Characteristics of data supported for estimation of spectral analysis models.
Selecting the Method for Computing Spectral Models
How to select the method for computing spectral models during estimation in the app and at the command line.
Controlling Frequency Resolution of Spectral Models
Controlling frequency resolution of spectral models during estimation in the app and at the command line.
The spectrum of a signal is the square
of the Fourier transform of the signal. The spectral estimate using
the commands spa
, spafdr
, and etfe
is
normalized by the sample time T: