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Hi everyone Any help please. In Matlab, even if in guiding me

Asked by HAITHAM AL SATAI on 27 May 2019
Latest activity Commented on by Raj
on 27 May 2019
1) Set a requirement for step response, like settling time, overshoot and static error of
output.
2) Select the desired poles according to your requirements. If possible, calculate the
feedback matrix K to place the poles to the desired poles.
3) Simulate step response of the feedback system and calculate the parameters
including overshoot, settling time and static error. If the system does not satisfy the
requirement, go back to step 2).
4) Design state observer of the system. The magnitude of observer poles must be 2~5
times of system poles. Select different observer poles and compare the performance
of observers.
5) Change the dominant poles of the system and compare the performance. Analyze
the effect of dominant poles to system performance. Observe the responses of each
state variable.

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1 Answer

Answer by Raj
on 27 May 2019
 Accepted Answer

1) Step 1: Choose suitable time domain criteria for your system and See the example on how to compute the dominant eigen values from here.
2) Step 2: Use 'place' to get your feedback matrix K to place the poles to the desired poles. See details here.
3) Step 3: Use 'step' command to get step response of your state space system.
4) Step 4: See the function defined here. You'll get an idea on how to create observers with desired poles.
5) "Change the dominant poles of the system and compare the performance. Analyze
the effect of dominant poles to system performance. Observe the responses of each
state variable" - Try it out!!
Also, to get help on Homework questions, Put a tag of 'Homework' and show what you have done from your side. All the best.

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Glad to help. Try it out and get back if you get stuck somewhere. Good luck!

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