【book】The PID Control Algorithm

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1、ThePIDControlAlgorithmHowitworks,howtotuneit,andhowtouseitnd2EditionJohnA.ShawProcessControlSolutionsDecember1,2003IntroductioniiJohnA.ShawisaprocesscontrolengineerandpresidentofProcessControlSolutions.AnengineeringgraduateofN.C.StateUniversity,hepreviouslyworkedforDukePowerCompa

2、nyinCharlotte,N.C.andforTaylorInstrumentCompany(nowpartofABB,Inc.)in,N.Y.RochesterHeistheauthorofover20articlesandpapersandcontinuestoliveinRochester.Copyright2003,JohnA.Shaw,Allrightsreserved.Thisworkmaynotberesold,eitherelectronicallyoronpaper.Permissionisgiven,however,forthisw

3、orktobedistributed,onpaperorindigitalformat,tostudentsinaclassaslongasthiscopyrightnoticeisincluded.IntroductioniiiTableofContentsChapter1Introduction.....................................................................11.1TheControlLoop...........................................

4、.............21.2Roleofthecontrolalgorithm.......................................31.3Auto/Manual...............................................................3Chapter2ThePIDalgorithm...........................................................52.1Keyconcepts.......................

5、........................................52.2Action.........................................................................52.3ThePIDresponses.......................................................52.4Proportional.................................................................62

6、.5Proportional—Outputvs.Measurement.......................72.6Proportional—Offset...................................................72.7Proportional—Eliminatingoffsetwithmanualreset.....82.8Addingautomaticreset................................................92.9integralmode(Reset

7、).................................................102.10Calculationofrepeattime..........................................112.11Derivative..................................................................122.12CompletePIDresponse.............................................142.13R

8、esponsecombinations.....................