-------- In message <5E5E892CF8A2440FBF18FFAD000B65FD@NewComputer>, "Lee Mushel" writes:
>I'm fairly sure that Jim is right. I never had to worry about PID machine >control before the late sixties and by the mid-seventies the concepts were >firmly in place and in use. The basic math of PID has been around for about 100 years. The invention of the servo (and synchro/resolver) is what makes its day... >>> 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.. I said "Almost all"... :-) -- 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.
