On Wednesday 12 June 2013 06:07:19 andy pugh did opine: > On 10 June 2013 00:20, Gene Heskett <[email protected]> wrote: > > And this is with Pgain > > > > at about 40, but there is a speed instability, an almost random 50 rpm > > wandering that doesn't go away if I turn off the pwm dither, > > Any PID tuning for a nonlinear system is likely to be a compromise. > > The lincurve module is actually modelled on the type of structure we > use at work to control nonlinear systems. Typically the P, I and D > terms are the output of such a lookup table. > (Which is why, rather unusually, that module has IO pins as well as > outputs). > > So, rather than setting up a 12-entry linearisation curve, you could > try a 3-entry curve to provide the P-term for your system.
Up early, thought I'd play with lincurve.9 using halrun. Unforch, its not part of the 2.5.x sim installed on this machine. :( And with the repo locked... 8:( Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> All men are mortal. Socrates was mortal. Therefore, all men are Socrates. -- Woody Allen A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
