What is the N coefficient filter in simulink?

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Rikke Pedersen
Rikke Pedersen 2016-5-3
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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回答（2 个）

Vaibhav Awale
Vaibhav Awale 2016-5-6
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.
  2 个评论
José Miguel Riquelme Domínguez
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

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SASANK DAS
SASANK DAS 2022-2-4
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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