Scott Seidman wrote:

> Tim Wescott <[email protected]> wrote in news:1q-
> [email protected]:
>
>
>>while a control loop can't even
>>have delay.
>>
>
>
> That seems somewhat overly generalized, no?
>
Yes.

I can either say "that's very clever of you to have caught that", or I
can fess up to leaving an "almost" out of there somewhere.

Certainly the performance of many control loops out there are limited by
delay, and the performance of almost all "high performance" control
loops ends up getting limited by the phase shift in the plant, sensors
or controller.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

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"Applied Control Theory for Embedded Systems" came out in April.
See details at http://www.wescottdesign.com/actfes/actfes.html