What is the N coefficient filter in simulink?

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Rikke Pedersen
Rikke Pedersen am 3 Mai 2016
Beantwortet: SASANK DAS am 4 Feb. 2022
What is the N coefficient filter in simulink? What effect does it have on the PID controller?

Antworten (2)

Vaibhav Awale
Vaibhav Awale am 6 Mai 2016
Hi Rikke,
Please refer to this post:
The filter coefficient is used to implement derivative action. Since implementing something like "Kd*s" is not possible since implementing improper transfer function is not possible. Hence instead of "Kd*s", we do something like:
Kd*(N*s/(s+N)).
So if N is sufficiently large, it tends to "Kd*s"
Hope this helps.
  2 Kommentare
José Miguel Riquelme Domínguez
Hi Vaibhav, I have the following question: how can implement in Simulink a PID expressed like this? I'm not able to put it in Simulink's form. Thanks for your help,
José Miguel
MYO ZIN AUNG
MYO ZIN AUNG am 26 Jun. 2020
You can use Simulink Transfer Function Block.

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SASANK DAS
SASANK DAS am 4 Feb. 2022
Can I give filter cofficient as N=2000, which will giving good indcutor current response for my buck converter, rather than using N=100(which will producing more noice)

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