At 07:16 AM 2/22/01 -0500, you wrote: > >Does anybody have any good references/sources for such an adaptive system? Bob, There are probably a lot more references than working systems. This kind of continously adaptive (stochastic, fuzzy-neural, model-adaptive) control has been bandied about in the literature for over 20 years. (as opposed to the type which deliberately perturbs the system and uses Z-N or other methods to tune the controller, which is much easier to accomplish). From what I've seen, what's out there in the literature won't work well without a LOT of work, and the few that do work are proprietary or only work with a very limited problem domain, or both. You might get better results by focusing on the elements of the problem, improving the performance (and eliminating variations in) the individual parts of your system. This could involve smarts, and maybe additional sensors (a la fuzzy control) or it could just involve mechanical improvements. One time I had a car in which the steering got gradually looser and looser, to the point where the steering wheel could be turned 1/4 turn almost and nothing would happen at the front wheels. Being run by a superb adaptive control system (me), I hardly noticed the change. Then someone else tried to drive my car, and could barely keep in the proper lane. A crank of a wrench and the requirements for the control system were drastically reduced. Best regards, =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Spehro Pefhany --"it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= -- 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