-------- In message <CAMQqFumOdB4gcFfQjQ_nced0C_U=fbmyofwl7vuxm8wotqg...@mail.gmail.com> , Didier Juges writes:
>In order to automatically compensate for different oven loading (and >ambient conditions), the controller injected a very low level "random" >noise over the temperature setting and by analyzing how that noise was >filtered by going through the oven, was able to determine the response of >the oven itself and from that optimize the PID terms in real time as a >function of the load. This was in the early 80's. It was pretty hot stuff >then, even for an oven :) Many off the shelf temperature controllers have an "auto-tune" button these days which does exactly that: Inject a heat-pulse, see what happens, do math... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [email protected] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
