'747 and Proportional Stuff

rr RRauscher at nni.com
Fri Jul 14 02:40:36 GMT 2000


(been busy)

The PID loop is executed 40 times a second (every 25 msec).  The prop
duration is a lookup as described. Note that the '747 tables for duration
is in seconds based on: TablVal = sec's * 40.

BobR.


Garfield Willis wrote:

> On Thu, 13 Jul 2000 10:41:44 -0700, garwillis at msn.com (Garfield Willis)
> wrote:
>
> >Well, here I go nullifying me own posts again. After reading thru Bob's
> >747Prop.txt file in incoming a bunch more times, I realized (duh) that
> >the "psuedo-code" of the PID algorithm IS pretty much there already. So
> >lemme amend my request to just the question of the timing of these
> >steps; namely how long for the controller to complete one full pass of
> >C/L computations?
>
> OKAY, you can belay THAT question also! Sheesh. It appears from
> sleuthing thru the P4 file, that the PID computation period is 12.5mSec
> on the P4's. Appreciate anyone confirming or correcting that impression.
>
> Gar
>

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