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1、ModelingandtheSpecificationOrientedStudyoftheInertialNavigationSystemonShipsHWANGCheng-neng,YANGJoe-ming,WANGShun-min(DeptofSystemsandNavalMechatronicEngineering,NationalChengKungUniversity,Tainan,Taiwan70101,ChinaAbstract:Inertialguidanceornavigationsystemofas
2、hipistheprocessofdirectingthemovementofashipfromonepointtoanotherandintegratingaccelerationtodeterminevelocityandposition.Itgivesdatashowingships’headings,velocitiesandpositionsaswellastheanglesofships’pitchrollandazimuth,whichareessentialinship’snavigationanda
3、reattractiveformilitarypurposes.Inthisstudy,theportionofmechanicalcomponentsofaninertialnavigationsystemisstudiedfirstandthenthedesiredspecificationsofthecomponentscanbeassignedbyadjustingthecontrolparametersaccordingtosuitablechoiceofunderdampedresponseshapesd
4、esired.Theworkingprocesses,themodesofoperationandthemodelofsystemdynamicareexploredindetails.Computersimulationismadeforthemechanicalportionofthesystemtoshowthevalidityoftheproposedsystemmodelandrelatedcontroldevices.Keywords:inertialnavigationsystem；modeling；p
5、erformancespecificationdesignofsystemsCLCnumber:U666.1Documentcode:A1IntroductionAsWorldWar2concluded,theelectronicindustrywasrapidlydevelopedandtheelectroniccomputerwasuniversallyappliedtoship’soperation.Inordertoreducehumanerrorsandimprovesafetyofnavigationat
6、sea,engineersbegantoactivelydevelopelectronicnavigationsystems.Electronicnavigationisusuallyclassified,accordingtooperation,intotwocategories:oneneedstobeassistedbyoutersignals,suchastheSatellitenavigation[1],theLoran-Cnavigation[2-4],theOmeganavigation[5]andth
7、eDeccanavigation[6]systems；theotheristheautomaticguidancesystem:theship’sinertialnavigationsystem[7-10]andtheDopplernavigationsystem[11].Amongthem,theinertialnavigationsystemistheonethatcanoffercompleteinformationshowingships’headings,velocitiesandpositionsaswe
8、llasthedataofships’pitch,rollandazimuthangles.Inertialnavigationsystemisthereforeattractiveforthemilitarypurposesandscientificstudies.2.ModesofoperationThesystemofinertialna
