基于模糊PID控制的电锅炉温度过程控制系统

29520085PIDFuzzyPIDbasedTemperatureProcessControlSystemforElectricBoiler(新疆大学电气工程学院,新疆乌鲁木齐830008):,PID,,,,,:PID:TP273:AAbstract:Anewcontrolstrategyforheatstorageelectricboilersisputforward;suchboilersarecommonlyadoptedinofficesandschoolbuildings.ThepurposesofconstantroomtemperaturecontrolandenergysavingaremiplementedbycombiningfuzzycontrolandPIDcontro.lTheoverallstructureofthesystem,thehardwarecircuitoffuzzycontroluni,tanddesignconceptofthesoftwarearegiven.Theresultofsmiulationindicatesthatthesystemfeaturesgoodrealtmieperformance,highcontrolaccuracyandrobustness,andwellreachesthegoalforroomtemperaturecontro.lMoreover,thepricingpolicyofelectricityissuedbyelectricauthorityisalsoconsideredinthedesign,thustheoutstandingsocialandeconomiceffectsareobtained;thesystemissignificantinfuturedevelopmentandapplication.Keywords:HeatstorageelectricboilerTemperaturecontrolPIDcontrolFuzzycontrolSmiulation修改稿收到日期:2007-11-12第一作者南新元,男,1967年生,2002年毕业于大连理工大学控制理论与控制工程专业,获硕士学位,副教授;主要从事PLC应用技术和现场总线技术的研究0,,,,,,,,,,,540kW,,,,,(202K)1PID,,,,,,,,,,,,,,PID,A/D,D/A4~20mA5PID,PROCESSAUTOMATIONINSTRUMENTATIONVo.l29No.5May2008,1PID,,PID,,05h,图1温度控制系统总体框图Fig.1Overallblockdiagramoftemperaturecontrolsystem,,PID,2,PID:;PID[1],,,,,,,22,,,图2逻辑控制流程图Fig.2Flowchartoflogiccontroltt1t2,2h,,,,TT15K,,PID,3--,,-[2]e(T-T0)e(-),3图3模糊控制系统结构图Fig.3Structureoffuzzycontrolsystem3,,,[3]:,eeC~,6PID,29520085;,;,(),L.A.Zadh,,;,;,,[4],C~U~,(uij)1313,[5],1,,1Tab.1RulesoffuzzycontrolUe-6-5-4-3-2-1-0+0+1+2+3+4+5+6-666665540000000-566654430000000-466543210000000-366543210000000-266541100000000-155432100000000e043332100-1-2-4-4-6-6+123430000-1-2-4-6-6-6+202320000-1-2-4-6-6-6+30222000-1-2-3-4-6-6-6+40000000-2-3-4-5-6-6-6+50000000-3-4-5-5-6-6-6+60000000-4-5-6-6-6-6-6,,[6]4,Matlab[7],,,4,PID,,G(s):G(s)=1300s+1e-150s(1)20,PIDKp=1.6,KI=0.08,KD=103000s图4PID控制效果图Fig.4ResultcurvesofPIDcontrol5K,4(a)4(a),,3000s,,,Smith7PID,PROCESSAUTOMATIONINSTRUMENTATIONVo.l29No.5May2008,4(b),,,4(b),1,4(c)1,0,1000s,4,,22Tab.2ComparisonofdynamicparametersPID=52.4%TW=3000sTP=500sSmithPID=28.6%TW=1500sTP=500s=0TW=1000sTP=900s5,,,,,,,2K,(045/kWh,015/kWh,020/kWh),,132,[1],,.[M].:,2002:107-110.[2].[M].:,2001:110-133.[3].[M].:,1996:67-85.[4].[M].:,1998:79-96.[5],.PID[J].,2000,21(1):17-24.[6],.PID[J].,2006,27(8):43-47.[7].Matlab[M].:,1996:136-149.(4),,,,,,,,,,,,,,,,,,[1],,,.[J].,2000,34(4):399-401.[2],.[J].:,2006,32(2):195-199.[3].[J].,2006,25(4):582-584.[4],,.[J].,2000,31(6):52-54.[5],,.[J].,2006,42(5):104-109.[6].Smith[J].,2006,23(6):150-154.[7],,.[J].,2005,36(9):79-82,115.[8],,,.[J].,2002,33(3):76-79.[9],,,.[M].:,2006.[10],,,.[J].,2004,20(1):259-262.[11],,.[J].,2007,23(1):38-40.[12],,.[J].,2007,38(2):115-119.[13],,,.[J].,2006,37(3):463-466.[14],,,.[J].,2006,22(11):187-191.8PID,