Time response of modes to an impulse

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Turgut Ataseven
Turgut Ataseven on 23 May 2022
Commented: Star Strider on 24 May 2022
For a 4x4 plant matrix, I want to see the time response of short period mode and phugoid mode of an aircraft for an initial perturbation, respectively. I have 2 roots of the plant matrix for both short period mode and phugoid mode and corresponding period times. How can I plot the responses of the 4 variables with specified initial conditions for an elevator angle deflection?

Answers (1)

Star Strider
Star Strider on 23 May 2022
If I understand correctly what you want, it is possible to return the state trajectories with lsim as described in Extract Simulated Response Data. The impulse and step functions also have this option.
Star Strider
Star Strider on 24 May 2022
I posted my best guess as to what might be appropriate in the context of a request without a defined model or an example of what the desired result is. That is still the best I can do.
The lsim funciton allows you to specify the input as a function of time, while the impulse and step functions supply specific inputs. All of them can output the system response as well as the state trajectories, and in the absence of further clarification, that is what I believe your post requested.

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