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ID:40367830
大小:260.14 KB
页数:7页
时间:2019-08-01
《An Introduction to Feedback Control for Optical Systems》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、AnIntroductiontoFeedbackControlforOpticalSystemsKeithB.PowellOPTI-521TutorialProjectStewardObservatory,UniversityofArizonaAbstractThebasicconceptsandcomponentsoffeedbackcontrolforopticalsystemsareintroduced.Openandclosedloopfeedbackcon…gurationsarepresentedandtheadvan
2、tagesanddisadvantagesofeacharediscussed.Asimpleandpracticaluseoffeedbackcontroltoimproveopticalperformanceisshownusingcameraimagestabilizationasanexample.Theroleoffeedbackcontrolinopticalsystemsforfutureapplicationsisdiscussed.1IntroductionWhyshouldopticsstudentslearn
3、aboutmethodsoffeedbackcontrol?Con-trolengineeringhasalongandproductivehistorywithlargeandexpensiveopticalsystems.Pointingandtrackingcontrolforastronomicaltelescopesareextremelyimportanttoachievinggoodimagequalityand,therefore,goodsci-ence.Advancedmilitaryopticalsystem
4、softeninvolveextensiveuseofcontroltheory.Applicationssuchasbeamstabilizationforhighenergylasers,vibrationreductionforopticalsystemsmountedonaircraft,andtrackingforIRandopti-calsensorsallrequirefeedbackcontroltomeettheirperformancerequirements.Inrecentyearsmanyotherdiv
5、erse…eldshavebeguntousefeedbackcontrolinopticalsystems.Suchdisparateapplicationsasactiveaberrationcontrolinlithographiclenses,controlsforpolishinglargemirrors,imagestabilizationoflaserguidestars,andevencontrolofquantumsystemsusinglasers,allusefeedbackcontroltopushthel
6、imitsofsystemperformance.Buteveniftheseriousopticsstudentchoosestoworkonsmaller,lessex-pensiveopticalsystems,itmaystillbenecessaryforthemtobefamiliarwiththebasicconceptsofcontrols.Theavailabilityofinexpensivecomputingpowerandthereductionincostandsizeofcomponentsnecess
7、arytoimplementcontrolsystems,havecontributedtotheproliferationofcontrolsystemsimplementedonsmaller,lessexpensiveopticalsystems.Finally,theintentofthistutorialisnottoteachthedetailsofcontroltheorywhichcanbefoundinmany…nereferences[6],[7].Ratheritistoexposeopticalengine
8、erstothebasicconceptsandcomponentswhichcompriseatypicalcontrolsystemsothattheyhaveafundamentalunderstandingofhowfeedbackcont
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