Which block in simulink library should I choose for the H_infinity controller.
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I've got this pic that I found in my search implementation of an H-infinity controller and a boost converter:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1734288/image.gif)
My question, is how to choose the H_infinity block from the library of simulink? and what is the block connected to it in its right hand side, how is it called?
Thanks!
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Aquatris
on 15 Jul 2024
Edited: Aquatris
on 15 Jul 2024
It probably is a custom subsystem which probably has a state space block inside. So you cannot find it in the library of simulink unless it is added as a custom library block.
You can see the down arrow symbol at the left bottom side of the block, which indicates it is a subsystem.
As for the signal connecting from the right side to the block, as with any other feedback controllers, it is connected to the error signal, which in this case a step block (reference signal) minus the output of your system.
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