[time-nuts] D term (was no subject)

Jim Lux jimlux at earthlink.net
Mon Jan 26 09:21:15 EST 2015

On 1/26/15 5:55 AM, Poul-Henning Kamp wrote:
> --------
> In message <54C5A270.7090007 at earthlink.net>, Jim Lux writes:
>> And there's decades, if not centuries, of experience with P, PI and PID
>> controllers in a practical sense.
> Not quite a century I belive:  Only the advent of electronics formalized
> the theory and developed the practice.
> Almost all mechanical "governors" er pure P.

Maxwell strikes again


definitely more than P controllers..

cups with liquid (Siemens governor), nonlinear mechanisms, etc.

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