2012/1/27 Peter C. Wallace <p...@mesanet.com>: > >> >> I have been playing only with P parameter so far, following this guideline: >> 1) increase P up to the moment, when motor becomes unstable; >> 2) add I to make it stable; >> 3) add D to make the loop stiffer; >> > > > > This is wrong, you add D to make it more stable not I > > I is added in small does only when all other tuning is close to remove the > last bit of static error and slew errors >
Peter, according to You, there is a mistake in manual. Integrator's manual, page 158, section of PID tuning with simple method: If the system must remain on line, one tuning method is to first set the I and D values to zero. Increase the P until the output of the loop oscillates. Then increase I until oscillation stops. Finally, increase D until the loop is acceptably quick to reach its reference. Viesturs ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
