电气工程专业英语课件.ppt

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1、电气工程及其自动化专业英语主编杨勇邓秋玲Unit6AutomaticControl6.2FeedbackControl6.1Introduction6.3ControlMethods6.4ControlTechnologies6.5FurtherReading6.1IntroductionNewWordsandExpressionsinterrelatedadj.相关的directv.引导regulatev.调节exertv.运用；施加restraintn.约束performancecharacteristics运行特性physicalproperty物理性质plan

2、tn.装置；设备agencyn.机构manipulatedvariable操纵变量feedbackn.反馈6.1IntroductionNewWordsandExpressionscomparatorn.比较器disturbancen.扰动actuatev.开动flippingn.翻转illuminatev.照亮constitutev.组成luminousflux光通量lumensn.流明variablen.变量acceleratordepression对加速的抑制acceleratorpedal加速踏板6.1IntroductionNewWordsandExpres

3、sionscarburetorbutterflyvalve化油器阀门lightbulb灯泡relayn.继电器photocelln.光电池mechanicalalarmclock机械闹钟audiblesound可听见的声音bellhammer铃锤besubdividedinto被分为follow-upsystem随动系统externalintervention外部干预6.1IntroductionNewWordsandExpressionsmanualadj.手动的intelligentadj.智能的interdependentelements相互依存的元件stimu

4、lin.激励thermostatcontrol恒温控制aileronn.副翼ruddern.方向舵cowlflap整流罩6.1Introduction6.1.1ElementaryConceptofControlSystemstextAcontrolsystemisaninterrelatedcollectionofelementsthatdirectsorregulates(controls)energyorexertsrestraint,fromasourcepointtoausagepoint.Tobeacceptable①,itmusthavephysical

5、propertiesandperformancecharacteristicsthatsatisfyallconcernedobservers.Physicalpropertiescanbepeculiartoanapplication,andtheyareusuallysubjectto②economicconstraintspresentingtheirownchallengetothedesigner.However,differentphysicalsystemshaveperformancesimilaritiesthatlogicallyleadtoaun

6、ifiedcontrol-systemtheory.Note：①不定式短语tobeacceptable为目的状语，意思是“要得到认可”。②besubjectto意思是“受到……的制约”。6.1.1ElementaryConceptofControlSystemsTherearesomedefinitionsandterminologyrelatedtocontrolsystem.(1)Theplantistheoriginalorbasicsystemoverwhichcontrolisdesired;itisalsocalledthecontrolledsystem

7、.(2)Thecontrolelement,orcontroller,istheagencythatappliesacontrolsignaltotheplant①.Thesignalrepresentsachangeinamanipulatedvariableofthesystem.(3)Thecontrolledvariableisthatcharacteristicoftheplantwhichisbeingregulated.Usually,plantoutputisthecontrolledvariable.Note：①thatapplie