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基于超紧耦合GPS_INS.docx

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Vol.6No.2,Jun.2015JournalofMeasurementScienceandInstrumentation153

Ultra-tightGPS/INSintegrationbasedlong-rangerocketprojectilenavigationmethod

ZHAOHan-dong,LIZhi-peng,ZHANGHui-suo

(SchoolofMechatronicsEngineering,NorthUniversityofChina,Taiyuan030051,China)

Abstract:Accuratenavigationisimportantforlong-rangerocketprojectilesprecisestriking.Toobtainstableandhigh-per-formancenavigationresult,aultra-tightglobalpositioningsystem/inertialnavigationsystem(GPS/INS)integrationbasednav-igationapproachisproposed.Theaccurateshort-timeoutputofINSisusedbyGPSreceivertoassistinacquisitionofsignal,andoutputinformationofINSandGPSisfusedbasedonfederatedfilter.Meanwhile,theimprovedcubatureKalmanfilterwithstrongtrackingabilityischosentoserveasthelocalfilter,andthenthefederatedfilterisenhancedbasedonvectorsharingthe-ory.Finally,simulationresultsshowthatthenavigationaccuracywiththeproposedmethodishigherthanthatwithtraditionalmethods.Itprovidesreferenceforlong-rangerocketprojectilenavigation.

Keywords:long-rangerocketprojectile;globalpositionsystem;inertialmeasuringunit;ultra-tightintegration

CLDnumber:TJ415Documentcode:A

ArticleID:1674-8042(2015)02-0153-08doi:10.3969/j.issn.1674-8042.2015.02.008

Long-rangerocketprojectileisakindofwidelyusedweaponequipmentduetodistantrangeande-normousfirepower.Becausetheattackingprecisionoftraditionalrocketprojectilecannotfulfillthere-quirementsofaccuratestriking,guidancerocketisdesignedtosolvethisproblem.Guidancerocketpro-jectileneedstoimplementflightcontrolandballisticcorrectioninthecourseoftheflighttohitthetargetprecisely.Inthiscase,theinformationofpositionandflightvelocitymustbemeasuredinthecour

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