How to extract State-Space Matrices, states, etc. from Simulink model for Simscape subsystem?

Is there a function such as ""power_analyze" for Simscape to extract State-Space Matrices, states, etc. from Simscape Simulink model or subsystem?

[A,B,C,D,x0,states,inputs,outputs,uss,xss,yss,frequencies,Hlin] =power_analyze('sys')

Answer 1

[Aabha]

Hi @Yousef B Bedoustani,

I understand that you are looking for a function similar to “power_analyze” to extract state-space matrices from a Simscape model.

This can be done using the “Linear Analysis Tool” provided by Simulink Control Design. For instance, the function “linmod” can be used to extract state matrices from a Simscape or Simulink model. The “linmod” function performs a perturbation-based linearization around the model’s initial conditions, or a specialised operating point. You can refer to the function documentation for more details.

https://www-test1.mathworks.com/help/releases/R2019a/simulink/slref/linmod.html

The function can be used as follows:

[A, B, C, D] = linmod ('system_name');

You can also specify the operating point around which the model has to be linearised, using additional input arguments.

[A, B, C, D] = linmod ('system_name', x, u);

Here, “x” and “u” represent the state and input vectors respectively.

You can also refer to the “Linearizing Models” documentation in Simulink, for more details.

https://www.mathworks.com/help/simulink/ug/linearizing-models.html