[s-cars] Re: fuzzy logic et. al.

[Mihnea Cotet]

Adaptive memory for automotive applications is most usually a FIFO (first 
in first out) type of memory...

HTH,

Mihnea

At 20:13 23/01/2004 -0500, Kirby Smith wrote:
>What happens with the A'pexi is that as the temperature changes toward
>winter, the controller's learned summer response tends to generate too
>high a boost pressure, so it learns to cut back WG top pressure.  In the
>spring, the boost starts getting lower, so the controller relearns to
>lean on the WG a bit more.  It's just an adaptive control.  Whether
>there is any fuzzy logic used, as the term is properly defined, I don't
>know.  Nor do I see a reason for it to use fuzzy logic.  There are more
>efficient ways of adaptive control, so long as the critical state is
>measureable.
>
>kirby
>
>
>Vincent Frégeac wrote:
> >
> > Working with the delta between expected and actual is the definition of
> > "closed loop" controllers, which is any controller with a sensor for
> > what it controls. "Fuzzy logic" does a bit more. It react to this gap
> > once and "remember" what happens so next time, instead of trying
> > different parameters, it will apply what it learned from the last time.
> > Moreover, if it learns from two set of conditions, it can deduct what to
> > do in between these conditions. In fact, in any application when you
> > can't program all the possible conditions, a learning "fuzzy logic"
> > controller is superior to a classical binary logic programmed
> > controller.
> >
> > BTW, I'm thinking that, as we have to reset the Motronic to erase what
> > it has learned, there is a good chance the Motronic includes a "fuzzy
> > logic" part for this "learning" process.
> >
> > My 0.02 cents of experience in fuzzy logic and other controllers, no
> > BTDT in engine control though.
> >
> > Vincent.
> >
> > -----Message d'origine-----
> > De : s-car-list-bounces at audifans.com
> > [mailto:s-car-list-bounces at audifans.com] De la part de QSHIPQ at aol.com
> > Envoyé : 23 janv. 2004 08:26
> > À : CaptMagu at aol.com; FvAMI at aol.com; pizzoman at yahoo.com
> > Cc : s-car-list at audifans.com
> > Objet : [s-cars] Re: fuzzy logic et. al.
> >
> > Pastore...  The delta between map and desired boost could be the danger
> > zone
> > by definition.  The way I understand these machines in learn mode is
> > that the
> > map is looking for flutter vs desire, which is an indication of surge
> > line by
> > definition.
> >
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