Get Current Value of Generalized Model by Model Conversion

This example shows how to get the current value of a generalized model by converting it to a numeric model. This conversion is useful, for example, when you have tuned the parameters of the generalized model using a tuning command such as systune.

Create a Generalized Model

Represent the transfer function

$$F=\frac{a}{s+a}$$

containing a real, tunable parameter, a, which is initialized to 10.

a = realp('a',10);
F = tf(a,[1 a]);

F is a genss model parameterized by a.

Tune the Model

Typically, once of you have a generalized model, you tune the parameters of the model using a tuning command such as systune. For this example, instead of tuning the model, manually change the value of the tunable component of F.

F.Blocks.a.Value = 5;

Get the Current Value of the Generalized Model

Get the current value of the generalized model by converting it to a numeric model.

F_cur_val = tf(F)

F_cur_val =
 
    5
  -----
  s + 5
 
Continuous-time transfer function.

tf(F) converts the generalized model, F, to a numeric transfer function, F_cur_val.

To view the state-space representation of the current value of F, type ss(F).

To examine the current values of the individual tunable components in a generalized model, use showBlockValue.