AFM measurement/backpressure (was Turbo speed sensor)

[Tom Sharpe]

"Mike (Perth, Western Australia)" wrote:

> >> Regardless of the practical need/outcome - I'd still be interested to
> >> see what sort of revs the damn thing actually does
> >
> >60K to 120K rpm
>
> Is it possible to measure turbo speed with vibration - (sound?)  just a brain
> F~~~.
> >
> >Processor speed ain't an issue.
>
> Well I think it is - for a reliable realtime o/s and scheduler its helpful
> to have lots of grunt - given the typical overhead a really good o/s
> introduces into the overall responsiveness. With a faster processor there
> are so many more exception conditions you can operate on in dynamic
> conditions. Sure lazy AFM to injector translation with correction from
> engine temp etc doesn't need a 10Mhz cpu - a simple 1Mhz 68705R3 will
> do nicely - but once you start adding high speed sensors or at least
> expect to provide cleverer filtering algorithms - such as kalman filters
> and all the related conditions then the faster the processor the reduced
> chance you have of a scheduling bind at really high rpms.
>

I kind of agree, but I rather see several small/fast processors (pics?) handling
those "extra" functions, ie. sampling and filtering each sensor (or pair),
producing a set of outputs for the main processor to use.

provides easier programming and lots of power with cheap/slow components.  Tom

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