Re: Focus on the Dead Time!

Jeff Finlayson <[EMAIL PROTECTED]> wrote:
> Dwstclair wrote:
> 
> > The potential performance of a control loop is limited by
> >  the apparent or real dead time in the loop. You are up
> >  against a stone wall if you try to get better performance
> >  out of a loop, than the dead time will allow, by tuning
> >  alone. If you need better performance, reduce the dead
> >  time, reduce the disturbance, use feed forward or do
> >  something else, but tuning can do only so much. There are
> >  sophisticated approaches to reducing the problem, but
> >  these are not for the novice.
> > 
> > For more information you may refer to a booklet  "Controller 
> > Tuning and Control Loop Performance, a Primer, Second Edition" 
> > which is available in the US at the cash discounted price of $17 
> > if paid with a check or money order.
> > 
> > If you want more information on this booklet, visit
> >  http://members.aol.com/pidcontrol/booklet.html, or e-mail
> >  me for a four-page brochure. It has sold 29,634 copies to date. 
> > Companion software ($11) is available and a link to that page is provided.
> > 
> > David W. St. Clair <[EMAIL PROTECTED]>
> > Straight-Line Control Co.
> 
> You make the same post every few months.
> http://makeashorterlink.com/?H1B862CA6

He's not as bad as the [EMAIL PROTECTED]