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What is the N coefficient filter in simulink?

Asked by Rikke Pedersen on 3 May 2016
Latest activity Answered by Vaibhav Awale on 6 May 2016
What is the N coefficient filter in simulink? What effect does it have on the PID controller?

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Answer by Vaibhav Awale on 6 May 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.

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