Simulink Control Design™ - MathWorks

The Bode Diagram section of the viewer includes a line showing the exact response

syslin. This view can be useful to identify particular frequencies where the estimated

response deviates from the linearization.

Input Arguments

model — Simulink model

string | character vector

Simulink model, specified as a string or character vector. The model must be in the

current working folder or on the MATLAB path.

io — Analysis points set

linearization I/O object

Analysis points set that contain inputs, outputs, and loop openings, specified as a

linearization I/O object. The analysis point set defines the subset of the Simulink model

whose frequency response you want to estimate. To create io:

• Define the inputs, outputs, and openings using linio.


• If the inputs, outputs, and openings are specified in the Simulink model, extract these
  points from the model using getlinio.

For frequency response estimation, I/O points cannot be on bus signals. io must

correspond to the Simulink model model or a normal mode model reference in the model

hierarchy. (If you use frestimate with an output analysis point in a model reference, the

Total number of instances allowed per top model configuration parameter of the

referenced model must be 1.)

Specifying I/O points for estimation is similar to specifying them for linearization. For

more information on specifying linearization inputs, outputs, and openings, see “Specify

Portion of Model to Linearize” on page 2-13.

input — Input signal

sinestream signal | chirp signal | random signal | time series

Input signal for perturbing the model, specified as one of the following:

• A sinestream signal, specified using frest.Sinestream or
  frest.createFixedTsSinestream

15 Alphabetical List