State observer bode plot

I want to do a frequency analysis of a state observer. Observer has two inputs. Control input u and the output of the plant y. Output is the state vector. I'm not sure how to select the inputs and the outputs to draw the bode plot. Basically I want to demonstrfate that a reduced order observer has a low phase lag than a full order observer but I can't figure out how to select the inputs and outputs to draw the Bode plot.

Answer 1

[David Sanchez]

Hi,

I'm sure that you can find an example similar to your problem in the Bode documentation:

https://mathworks.com/help/ident/ref/bode.html