二級頻標的馴服保持技術.pdf

1、西安電子科技大學碩士學位論文二級頻標的馴服保持技術姓名：孫永紅申請學位級別：碩士專業(yè)：測試計量技術及儀器指導教師：高建寧20100101AbStractAbstractThesecond—classfrequencystandards(includinghighstabilitycrystaloscillatorsandRbatomicfrequencystandards)areusedwidelyinclocksystemsinsat

2、ellitesandstationsonground，navigationandorientationdevices，diagnosesystemsforelectricpowerfault，synchronizationequipmentsforcommunicationnetworks，globalpositioningsystemandSOonThesefrequencystandardsarecalibratedfrequent

3、lyWhenthereferencesignalsarelostorthetransmissionchannelsarecutofftheaccuracyofthefrequencystandardswouldonlydependontheirownstabilityandagingSoanewmethodisproposedinthispaperThedevelopmentandwideapplicationsofthesecondc

4、lassfrequencystandardsareintroducedatthebeginningofthepaperandthentheenvironmentalandphysicalfactorsaffectingfrequencyaccuracyandstabilityareanalyzed，andalsoanewmethodtomaintainthehighfrequencystabilityandhigllaccuracyfo

5、ralongtimewithoutthereferencesignalsispresentedinthispaperThroughtheupdatingofinfluencesofthetemperatureandfrequencyshiftonthefrequencyaccuracywhenthesecondclassfrequencystandardsarebeinglockedbythereferencetimesignals，w

6、ecanobtaintheinfluencesoftheagingrateandenvironmentalfactorsonthefrequencyaccuracy，thenweusetherespondcompensationvaluescalculatedtocontroltheOCXOtomaintainitshi曲accuracyundertheholdovermodeAttheend，theresearchonthehardw

7、aredesignandalgorithmsofthesecondclassfrequencystandardssystemwhichhastheholdoverandkeepingfunctionarediscussedinthispaperThisnewmethodwillfilladomesticgapintechnologyareaandprovidetheguaranteeofprecisionformanyusersofou