[From Rick Marken (931216.1130)]
Bill Powers (931216.1020 MST) --
If H(s) = 1/s, then the perceptual
signal represents the time integral of S, and it is the time
integral of S that is controlled. If H(s) = s, then the time
derivative of S is perceived and controlled. Exactly what it is
about S that is controlled depends on the form of H(s), which in
PCT we call the perceptual input function.
And that is PCT in a Laplacian nutshell. Beautiful, Bill.
Osmo Eerola (931216-09.10) --
But before you can control you have to understand the process you
are controlling.
If you ever get to the point of understanding PCT -- ie.
understanding the proper application of control system
science to the behavior of living systems -- you will see that
this statement, though true when "you" are an engineer building
a control system, is precisely, unequivocally and demonstrably
false when "you" are the control system yourself.
Astoundedly,
Rick