Not a mathematician, but a fuzzy logic program is essentially a state
machine that has 'hidden' state storage cells. F.ex. a PID servo output
would depent only on input value and feedback. A fuzzy PID servo would
also remember the last direction reversal and use a different gain for the
D term immediately after it. This would make it able to handle gear
backlash while having a high D term in normal operation, without settling
oscillations. This is just an example and it may not be so good.

Peter

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics