What is the N coefficient filter in simulink?

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Rikke Pedersen 2016-5-3

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回答： SASANK DAS 2022-2-4

What is the N coefficient filter in simulink? What effect does it have on the PID controller?

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Rodrigo Arcanjo 2021-8-6

processamento de sinal - Coeficiente do Filtro MATLAB PID - Stack Overflow

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Answer 1

Vaibhav Awale 2016-5-6

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Hi Rikke,

Please refer to this post:

http://www.mathworks.com/matlabcentral/answers/63762-filter-coefficient-n-in-pid-block

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.

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José Miguel Riquelme Domínguez 2020-5-8

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 2020-6-26

You can use Simulink Transfer Function Block.

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Answer 2

SASANK DAS 2022-2-4

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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)