Re: Best Book on PID ??

From: Rhett Oracle (rhett97_at_marketbanker.com)
Date: 11/25/04 

Date: Thu, 25 Nov 2004 20:44:10 GMT

On Thu, 25 Nov 2004 09:45:23 -0800, John Larkin wrote:

> On Thu, 25 Nov 2004 12:28:37 -0500, Phil Hobbs
> <pcdhSpamMeSenseless@us.ibm.com> wrote:
>
>>I don't disagree that there are lots of similarities, or that there's a lot
>>of jargon in control system design that seems intended to preserve job
>>security rather than make concepts clear. (There's a lot of that in some
>>optics disciplines too--it isn't just an EE problem. Not to mention all of
>>anthropology.) If I'm designing e.g. a laser temperature controller, I use
>>Bode plots: one for each of several representative choices of ambient
>>temperature and thermal forcing. PLL design with nonlinear tuning is
>>similar. Not everything is that simple, however.
>>
>>Lots of control systems have to work in situations where an ugly settling
>>transient will cause destruction--from burned cookies and broken drive belts
>>to loss of life and property. There are very few purely electronic
>>situations (i.e. other than driving mechanical devices or large magnets)
>>where a poor transient response is that serious.
>>
>>Ordinarily, with an amplifier driving a speaker, say, you can have a few pops
>>and bangs, but no great harm is done, and they can be tuned out during
>>debugging. The nonlinearity is of a simple and intuitive sort, and there is
>>no complex coupling. There is also usually no external forcing, unlike e.g.
>>a motor controller which may have very different loads at different times.
>>It isn't possible to test every situation, and it's the ones we haven't
>>thought about that will turn round and bite us in the backside. Systems that
>>are uncoupled during normal operation, but become coupled due to faults and
>>transients, are a common source of this.
>>
>
> It's interesting that a lot of real-world control loops leave theory
> way behind, except for the fairly boring region of near-steady-state
> operation around null. The hairy parts, the transient and exception
> conditions, revert to art, instinct, and maybe simulation.

Just like life! Imagine that!

> I like systems like that.

Me, Too!
 
> John

;^j
R.

Relevant Pages

  • English eBooks Engineering
    ... Adaptive Voltage Control in Power Systems Fusco, ... Advanced Design Techniques for RF Power Amplifiers Krizhanovski, ... Advanced Fuzzy Logic Technologies in Industrial Applications Bai, ... Bioinformatics Using Computational Intelligence Paradigms Jain, ...
    (sci.med.nutrition)
  • Re: Best Book on PID ??
    ... >of jargon in control system design that seems intended to preserve job ... PLL design with nonlinear tuning is ... >Lots of control systems have to work in situations where an ugly settling ... >where a poor transient response is that serious. ...
    (sci.electronics.misc)
  • Re: Best Book on PID ??
    ... >of jargon in control system design that seems intended to preserve job ... PLL design with nonlinear tuning is ... >Lots of control systems have to work in situations where an ugly settling ... >where a poor transient response is that serious. ...
    (sci.electronics.design)
  • Re: Microchip programmer Sydney Aus
    ... schematic design, embedded firmware and pcb layout to finished product. ... possible through the use of advanced microcontroller products from Microchip ... microcontroller applications in Innovative Power and Control solutions. ... Resources cover a broad range of electronics ...
    (sci.electronics.design)
  • Re: Best Book on PID ??
    ... >>of jargon in control system design that seems intended to preserve job ... PLL design with nonlinear tuning is ... >>Lots of control systems have to work in situations where an ugly settling ... >>where a poor transient response is that serious. ...
    (sci.electronics.misc)
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