How to view the transfer function of the module directly built by Simulink

1. The first module is shown in the figure ：

  We have three ways ：

First of all ： choice input and output Connect , Then in the following interface

choice input and OUTPUT This option , Will appear from input To output Of the transfer function bode chart .

second ： For a closed-loop control module . Sometimes we just need to look at the open-loop transfer function BODE chart . At this time, you can insert open loop input and open loop output. In this way, we can see the transfer function of a certain part bode chart .

Third ： Otherwise you insert

input perturbation and output measurement Words , What you see is the point-to-point closed-loop transfer function based on the influence of the whole loop bode chart . Here we need to distinguish .