How do you guys set up the variables for the gear ratio using a CVT? Do you
guys assume that the CVT is at its overdrive gear ratio for the top speed? How
about for acceleration? I guess I'm still not sure how you guys are doing
DoE.
Thanks.
Quoting "Hallman, David M." <DMHALLMAN@stthomas.edu>:
> I am not sure what technique for DOE is being discussed but we seem to have
> great results the way we are doing it. It all depends on how you set up
> your tests and variables, and while you make some good points, our technique
> works well.
>
> _____
>
> From: susantoa@pdx.edu [mailto:susantoa@pdx.edu]
> Sent: Thu 4/8/2004 4:09 PM
> To: Hallman, David M.
> Cc: arvind chhikara; mini-baja@autox.team.net
> Subject: RE: total reduction
>
>
>
> It may be quicker, but it's not that accurate, especially if you're using a
> CVT. Theoretical values are helpful, but when the CVT is in place, that
> value
> can change quite a bit. Even if you're not using a CVT and the torque
> values
> and top speed values can be calculated, losses, rolling resistance, etc
> affect
> the actual numbers. I don't know of too many teams who have values for
> rolling
> resistance, drive train losses, etc for each of their individual cars. For
> example, you may have a top speed of 45mph calculated but in reality you're
> out
> of horsepower before you reach that speed on a flat terrain. That doesn't
> get
> reflected in DoE unless you have every bit of losses accounted for.
>
> Good idea though,
>
> Andre S
>
>
> > It is also possible to use Design of Experiments with the components you
> > just listed and statistically determine which set-up is the best. It
> would
> > also probably be quicker as well.
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