Re: modelling a montroller

[Werner Keilholz <werner@xxxxxxx>]

Timo Sengewald wrote:

> Hello!
>
> I'm doing my diploma thesis about a TRNSYS simulation of a solar
> heating system. My problem is to control all the flow rates that
> occur. The standard differential controller shipped with TRNSYS is not
> an appropriate solution.
> Is there another possibility (e.g. by using equations) to model a
> PID-controller than creating (or buying) a new controller type ?
> Another question concerning my controller problem is if it's possible
> to link the output of an equation with one of its inputs by defining
> an initial value for this input?

I'm not sure I understand your question better than Michael, but
if you mean a recursively defined equation, I don't think you could
convince the EQUATION card to do that (there is no
iteration inside a set of Equations). To do that, you need to
implement a Type in a language that supports recursion (C,
C++, PASCAL, FORTRAN, EES, ...).

Werner
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