[TRNSYS-users] Type 22

[David Bradley]

Krishna,
   One solution could be that you use either Type93 or Type573 (in the TESS 
Libraries) to delay the temperature you are monitoring by one time step and 
then to control based on the delayed temperature. In order to do this, you 
need to have a relatively small time step (on the order of 5 minutes or 
less) but by controlling on the system values from one time step previous, 
you are guaranteed to always be controlling based on a converged value.
Cheers,
   David

At 09:18 AM 7/20/2005, Krishna wrote:
>     I have a system with iterative feedback controller(Type 22) to 
> control the flow rate based on the error signal(Temperature). In the 
> secant method used by this type, one assumption would be that the error 
> signal produced by a control signal is repeatable (so that the control 
> signal can be interpolated). But it takes a few iterations for the system 
> to give out a constant error signal(i.e Converged values) for a given 
> control signal.
>    This makes the secant method unusable unless we use the converged 
> values to determine what the next control signal should be.
>    One way to work over this could be that we check for convergence and 
> the calculate the new control signal and then instruct trnsys that the 
> system is not converged yet for the current time step and do this until 
> the desired control signal is calculated.
>
>Could anyone please let me know if this is possible or if there is a 
>better method to solve this problem.
>Thank you,
>krishna
>_______________________________________________
>TRNSYS-users mailing list
>TRNSYS-users at engr.wisc.edu
>https://www.cae.wisc.edu/mailman/listinfo/trnsys-users

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