先进制造技术Lecture 1---Computer Process Control.ppt

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1、Lecture1ComputerProcessControlBy,ZhangHangweiMechatronicsEngineeringCollegeAdvancedManufacturingTechnologyContents1.PACS&CAPACS2.Automation3.Twokindsofcontrolsystems4.LevelsofcontrolsystemConcepts:MIS,Engineering,CAB1.PACS&CAPACS1.1WhatisPACS?(See1.0)Manyrelatedmfg.activitiesaregroupedtog

2、ethertoformaspecialapplicationsystem.1.PACS&CAPACS1.0.2WhatisCAPACS?(See1.0)Manyrelatedmfg.activitiesaregroupedtogethertoformacomputer-drivenspecialapplicationsystem.1.PACS&CAPACS1.0.2CAPACSQ1:WhatisthehubofFig.1.2?------databasesystemQ2:WhatarethespokesofFig.1.2?------CAM,CAPS,DCS,FIS,MIS,

3、CAD,CAPP,MMS=materialmanagementsystem1.PACS&CAPACSQ3:WhatareadvantagesofCAPACS?------increaseproductivity,reducewaste,andproducethingsitwouldnototherwisebeabletomake.1.PACS&CAPACSDefinition(See1.1)------Taketheplaceofobservation,effortanddecisionbyhuman.------Bedefinedasasystemthatisrelativ

4、elyself-operating.Function2.Automation自动控制系统是在无人直接参与下可使生产过程或其他过程按期望规律或预定程序进行的控制系统。Automationvs.robotsAutomation–MachinerydesignedtocarryoutaspecifictaskBottlingmachineDishwasherPaintsprayerRobots–machinerydesignedtocarryoutavarietyoftasksPickandplacearmsMobilerobotsComputerNumericalControlm

5、achines(Thesearealwaysbetterthanrobots,becausetheycanbeoptimallydesignedforaparticulartask).(a)(b)(c)(d)(e)(f)(g)(h)PhraseLine3:taketheplaceof取代Line5:respondto对……响应Line5:encodedinstruction编码指令2.AutomationDefinitionofProcessControl(See1.2)------Thecontrolofvariablesinamfg.process,whereoneora

6、nycombinationofmaterialsandequipmentproducesormodifiesaproducttomakeitmoreusefulandmorevaluable.3.Twokindsofcontrolsystemsvariables液体混合装置的原理示意图HMLX3X1X2AB启动停止MvariablesvariablesClassification(See1.2)Closed-loopControlSystemOpen-loopControlSystem3.TwokindsofcontrolsystemsOpen-loopControlSyst

7、em3.TwokindsofcontrolsystemsFig.PrincipleofSteppingMotorClosed-loopControlSystem3.TwokindsofcontrolsystemsOpen-loopControlSystem3.TwokindsofcontrolsystemsClosed-loopControlSystem3.Twokindsofcontrolsystems3.Twokindsofcontrolsystemsopen-loopControlSystemCl