[time-nuts] TBOLT learning

Ulrich Bangert df6jb at ulrich-bangert.de
Thu Jun 18 09:50:43 EDT 2009


Bruce and Neville,

IF the Tbolt can learn something at all, it must be a completely different
process against the Z3801 with the TBolt's loop time constant being fixed by
the user (or by 100 s as the default).

Best regards
Ulrich Bangert

> -----Ursprungliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von Bruce Griffiths
> Gesendet: Donnerstag, 18. Juni 2009 14:10
> An: Discussion of precise time and frequency measurement
> Betreff: Re: [time-nuts] TBOLT learning
> 
> 
> Neville Michie wrote:
> > Hi,
> > I am building a temperature control system to keep a tbolt 
> warm. If I 
> > start it at a constant temperature which never varies how 
> can it learn
> > what its temperature coefficient is?
> > Should it be started in varying ambient conditions for a 
> day or a week
> > to learn
> > then control the temperature?
> > Should it be run at 5 degrees below control then 5 degrees above to
> > teach it?
> > Does anybody know?
> > could be an interesting project,
> > cheers, Neville Michie
> >
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> >
> Neville
> 
> Given the finite resolution of the temperature sensor if the 
> temperature variation within the chamber is less than this it 
> wont won't matter.
> 
> Since the temperature coefficient may not be constant its 
> probably advisable to have the temperature vary smoothly over 
> a range rather than just choosing 2 temperatures. The tbolt 
> software is probably designed to cope with smooth temperature 
> variations.
> 
> The tbolt may not actually retain the temperature corrections 
> for more than a few days at most as it continually adapts to 
> its surroundings so allowing it to learn its tempco may not 
> be very useful if you intend to closely regulate the 
> temperature of its surroundings.
> 
> Bruce
> 
> 
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