On 1/26/15 5:55 AM, Poul-Henning Kamp wrote:
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In message <54c5a270.7090...@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
http://upload.wikimedia.org/wikipedia/commons/b/b1/On_Governors.pdf
definitely more than P controllers..
cups with liquid (Siemens governor), nonlinear mechanisms, etc.
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