What is the input of the function trim('sys')?

How do i use the function trim('sys')?

https://de.mathworks.com/help/simulink/slref/trim.html

I have 4 Matrices A,B,C,D like in the example from mathworks.

But how can I input them? What is 'sys'?

I googled a lot but i didn't found out what 'sys' is.

I already tried to create a System with sys = ss(A,B,C,D);

Answer 1

[Titus Edelhofer]

sys is the name of a Simulink model

The doc says "Consider a linear state-space system modeled using a State-Space block". So sys would be:

• create new Simulink model
• add State-Space block
• feed the 4 matrices
• and then call trim

Titus