[Scilab-users] PID controller, howto write this as S parameters?

[Thiago Costa]

Hello Cedric,

You can implement it as a sum of terms U(s) =  E(s)kc + E(s)/tis +
tdsE(s) as depicted in the attached file.

[]'s
Thiago C.

-- 
Department of Chemical Systems Engineering
School of Chemical Engineering
University of Campinas (UNICAMP)

2013/12/13 cedric.dewijs at telfort.nl <cedric.dewijs at telfort.nl>:
> Hi All,
>
> I'm using xcos. I am trying to describe a PID controller as S parameters. So
> I want to make 3 CLR blocks. One for the P action, One for D and one for I.
> So I start Xcos, choose continuous time system, and then 3 CLR blocks.
>
> For the P=2 I set Numerator = "2" and Denominator = "1" (Without quotes)
> For the I=0.1 I set Numerator = "0.1" and Denominator = "s" (Without quotes)
> For the D=5 action I set Numerator = "5*s" and the denominator = "1"
> (Without quotes). Now I get the error message "Transfer function must be
> proper or strictly proper". In the source of scilab I see this error is
> thrown when the order of the numerator is higher than the order of the
> denominator.
>
> Is there a way around this?
>
> Best regards,
> Cedric
>
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