自动化专业英语

目录Lesson1AnalogAmplifiers....................................................................................................................1Lesson2BasicCircuitsofOperationalAmplifiers............................................................11Lesson3CMOSLogicCircuit................................................................................................................23Lesson4Flip-Flop.....................................................................................................................................33Lesson5IntroductionstoControlSystems.............................................................................47Lesson6IntroductionstoMathematicalModelsofPhysicalSystems.......................57Lesson7BasicControlActionsandIndustrialAutomaticControls.........................68Lesson8SystemDesignandCompensationTechniques..........................................................81Lesson9NonlinearControlSystems...............................................................................................91Lesson10IntroductionstoPhase-PlaneAnalysis...............................................................100Lesson11Discrete-timeSystemsandthez-TransformMethod.....................................110Lesson12State-spaceAnalysisofControlSystems..........................................................121Lesson13IntroductionstoLiapunovStabilityAnalysis...............................................130Lesson14IntroductionstoOptimalControlSystems........................................................138Lesson15IntroductionstoSensors.............................................................................................148Lesson16IntroductionstoPIDControllers...........................................................................157Lesson17IntroductionstoProcessControl...........................................................................166Lesson18IntelligentControl.........................................................................................................175Lesson19IntroductionstoPLC.......................................................................................................185Lesson20MicrocontrollerIntegratedCircuitWithReadOnlyMemory...................195自动化专业英语·VI··VI·Lesson21CADAndCAM............................................................................................................................204Lesson22MotorStartingandBrakingSystems......................................................................216Lesson23SpeedControlofDCMotor...........................................................................................230Lesson24FrequencyControlforACMotor...............................................................................242Lesson25ModelingaSimpleContinuousSystemBasedonMATLAB..............................253附录1常用专业词汇表.............................................................................................................................265附录2中英文课程对照.............................................................................................................................285附录3单位换算...........................................................................................................................................296附录4度量衡比较表.................................................................................................................................299附录5常用数学符号.................................................................................................................................304附录6课文参考翻译.................................................................................................................................306参考文献............................................................................................................................................................352Lesson1AnalogAmplifiersAtthemostbasiclevel,asignalamplifierdoesexactlywhatyouexpect–itmakesasignalbigger!However,thewayinwhichitisdonedoesvarywiththedesignoftheactualamplifier,thetypeofsignal,andthereasonwhywewanttoenlargethesignal.[1]Wecanillustratethisbyconsideringthecommonexampleofa“Hi-Fi”audiosystem.InatypicalmodernHi-Fi:system,thesignalswillcomefromaunitlikeaCDplayer,FMtuner,oraTape/Minidiskunit.Thesignalstheyproducehavetypicallevelsoftheorderof100mVorsowhenthemusicismoderatelyloud.Thisisareasonablylargevoltage,easytodetectwithsomethinglikeanoscilloscopeoravoltmeter.However,theactualpowerlevelsofthesesignalsarequitemodest.Typically,thesesourcescanonlyprovidecurrentsofafewmilliamps,whichbyP＝VImeanspowersofjustafewmilliwatts.AtypicalloudspeakerwillrequirebetweenafewWattsandperhapsover100Wattstoproduceloudsound.HencewewillrequiresomeformofPowerAmplifier(PA)to“boost”thesignalpowerlevelfromthesourceandmakeitbigenoughtoplaythemusic.Fig.1.1showsfourexamplesofsimpleanalogamplifierstagesusingvarioustypesofdevice.Ineachcasethea.c.voltagegainwillusuallybeapproximatedbyFig.1.1ExamplesofvoltageamplifiersAv≈－R1/R2(1-1)providedthatthea