熊本大学学術リポジトリ Kumamoto University...
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熊本大学学術リポジトリ
Kumamoto University Repository System
Title Wind Estimation by Unmanned Air Vehicle with Delta
Wing
Author(s) Makoto, Kumon; Ikuro, Mizumoto; Zenta, Iwai;
Masanobu, Nagata
Citation Proceedings - IEEE International Conference on
Robotics and Automation: 1896-1901
Issue date 2006-01-10
Type Journal Article
URL http://hdl.handle.net/2298/15436
Right (c) 2005 IEEE. Personal use of this material is
permitted. Permission from IEEE must be obtained
for…
Proceedingsofthe2005IEEE1ntemationaIConferenceonRoboticsandAutomation
BaにeIona,Spain,ApriI2005
WindEstimationbyUnmamedAirVehicle
へwithDeltaWing
MakotoKumon,nnlroMizumotoandZentalwaiMasanobuNagataXi"'zcz碗。〃伽ye師奴2-39-1肋、,ノhz〃Rn`mamoねMz"o"αJCb"egeqプZbch"oJOgy
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勉伽"@〃0.A"腕α碗om-"、cWp〃czgzz〃@ecJmcMQjp
AbsmzcトInthispapenanalgoIithmtoestimatewinddirectionbyusingasmaUandnghtUnmannedAirVehi・cIe(UKV)caUedKITEPLANEwasprOposeddmTEPLANEhadabigmainwingwhichisakite・likedeUtashapeand,therpfbre,itwaseasytobedisturbedbywindqHOweve喝this
disadvantageimpnesthattheKrmPLANEhasanabilitytosensewindandthatitisexpectedtousetheKITEPLANEasasensorfDrwindestimation・Inordertoachievethisfbature,dynamicsofUleKITEPLANEunderwinddisturbmcewere
derivedandanumericalestimationmethodwasproposed・DevicesequippedonboardwerealsodeveU叩edandtheproposedmethodwasimplemented・ResmtsofaneXperimentshowedtheeffCctivenessoftheproposedmetho。.〃。‘rZbmos-KIIEPLANE,UnmaImedAirVehicIe,Wind
disturbance,Estimation.
[10][11]andShim[12]haveproposedcontrOlsystemsfbrnonhearandnomnnumumphasesystemssuchasautonomousUAVsbyapproximatelinearlizatiOnapproach・Al-mddabi[13]concentratedtolongitudinalmaneuverandprOposedanonUnearoutputtrackingmethod.IntelUgentapproachessuchasartiiicialneuralnetworks,fUzzylogiccontrollers[14]havebeenalsoutiUzedMontgomery[15]proposedaleamingmethodfbrafnzzy-neuralcontlollerbFemdndez-Montesinos[10]utiUzedfUzzylogicfbrguid‐anceandcontrolwhenanairplanewaslandingunderwindsheamVa56dk[17]adoptedafUzzylogiccontroUerwhichwasfirstlyprOposedbyMamdani[18LSugeno[19]alsoprOposedafUzzycontrollerfbranautonomoushelicoptemVariousstructureofUWshavebeenalsostUdiedHen-
coptershavebeenstudiedWidely(e、9.[19],[15][10],[20],[11],[12])mSpiteofitscomplexdynamicsbecauseitisabletohoverorstOpmtheairBItisalsosignificantlyimportanttomakeUAVssmallandUght、Grasmeyer[21]developedaMicroAirVehicle(MAy)namedblackwidow
andWU[22]prOposedaMAywhosewmgspanwassmallerthan4cmDeng[24]andSchenato[25]studiedsmallMAVsmspiredfrominsects、Microdevicesfbrsmall
UAysarealsoimportantandlyshvski[26][27]studiedspecialcontrOlsurfacesfbrMAVs
lnthispapelbanUAVwhichisnotonlysmaUandlightbutalsohaslargepayloadisconsidered・TheUAVisnamedasKITEPLANE[281[29]becauseitsmain
wingwhichisthelargestcomponenthasakite-nkedeltashape(Fig.1)Becausethemainwmgismadeofcloth,itislightandflexible、Therefbre,themainwmgcouldbelargewithoutmakingtheairplaneheavyasfOrrigidiixedwmgs、ThisimPlieSthatthemTEPLANEisabletobe
lightandtohavelalgepayloadsimultaneously60wmgtotheneXibiUtyofthewmg,theaiIplaneisrathersafeandrobustevenwhenitcrashedmtotheground・Thecenterofthemasslocatesunderthemainwmgandaileronsattachedwithdihedralangles,Thismakesattitudeinatrimstateratherstableandthemotioniswell-behavedTherefbre,theairplanemaybecontrolledonlybyusingslow-ratelow-costsensorssuchasGPSwithoutafUUattitudemeasurement・
Nagata[29]proposedatrajectolyfbUowmgcontroUerfbrtheKrrEPLANEbasedonaPmoutputfeedbackwithoutattitudemfbnnationandresultsofnumericalsimulations
showedtheeffectivenessofthemethodundertheabsence
1.INTRODUCTION
UmnannedAirVehicle(UAy)sarerequiledmorderfbrobservationandrescueactivitiesatdangerousareassuchasvolcanoes,areasstrickenbyearthquakes,firesandsoonFrompracticalvieWpoints,thoseUAVsareneededtOhaveenoughpayloadtocanyeqUipments,tobeabletoDyfOranenoughtime,tobesmaUandnghtandtobecarriedeasilytotheplacewheretheyarelaunchedortakenoffESpeciallybsinceitisnecessaryfbrUZWstoHyatlowaltitudemordertoobserveterrain,UAVsarelikelytofaceadangertofallbecauseofirregUlarwindorobstacleaTherefbre,sophisticatedautopilotsystemsarenecessaryandUWsshomdbelesshazardouseveniftheycrashed、Automaticcontrolfbrairplaneshasalonghistoryand
thesemanyControltechniquesarealsoabletobeappnedfbrautonomousUAVs、SinCedynamicsofaiIplanesarenonlineancontrO11ersbasedonheartheoliesarenot
sufficientfbrtrimconditionswhicharedifferentfromthe
nominaltrimcondition、InordertoovercomethisdifficUltybitisconnnontoadoptrobustcontrolapprOaches,gamschedulingtechniqUesandsoon,Forexample,Khammash[1]appUedH6oapproachtocontrolthelongitudinalpitchmotionunderumcertaintiesofmassandcenterofgravity6Chu[2]prOposedacontmllerbasedongainschedulingfbrairplaneswithmUltipleenginesbyusingthrottlesonly・Kaminer[3][4]alsoproposedatrackingcontroUerbyutilizmggainscheduling、Shtessel[5]adoptedaslidingmodecontrOUertakingboundedinputsintoaccountHess[6]andAndrievslg/[7]alsoconsideredboundedcontrO1
inputs、DynamicsofUAysarenotonlynonlmearbutalsononmmnnumphase、Hauser[8],BCIⅣenutti[9],KOC
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IIKITEPLANE
KnEPLANEismtroducedbrieHymthissectionlt,s
fnlllength,wmgspanandheightare2,280mm,2,780mm
and1,130mmrespectively、Weightisabout20kgPayloadofaKITEPLANEismorethan6kg、Itisabletotakeoff
fromamnwayoraHatTield,tonymorethan3jOOOm
abovesealevelandtolandontheground・Theahplane
hasfivewmgs,i、aadelta-shapedmamwmg,acouple
ofailerons,anelevatorandarudde必Themainwmgis
lixedto1hebodyServomotorsareattachedtoailerons,theelevatorandtherudderascontrolsurfaceactuators・
Theengmeismstalledinthecenterofthebodyandaservomotorcontrolsitsthrottle・
Anon-boardcomputersystemwhichwillberefelredasCPUisaPC/1041BM-PCcompatibleembedded
PCunit(Advantech,PCM-3370)andcomectedtoA/D
unit(Advantech,PCM-3718HG),GPS(FurunoE1ectricCo.,
GN-79)andFPGAsystemforaservosignalge、era‐tor/receiverunit、SensorunitcomectedtoA/Dumtconsists
ofthreeaccelerometers(Crossbow,CXO2LF3),threegyro-
scopes(MurataManuftlcturingCq,ENVD5F-03),amagne‐
tometer(AP1System,AM-Z1M)foranazimuthangleandtwomcnnation-meterOⅦidoriPrecisions,UVDOH)forroll
andpitchangles、A11servomotorsarecontroUedmanuallyviaradiocontrolmmanualmode,orautomaticallybyan
on-boardcomputersysteminautomode、AblockdiagramofthesystemisshownmFig・Z.
D
GPSreceⅣer
r
;。’○Rudder Ailemn
FigLKITEPLANE
ofwmddisturbance
However,wmddisturbancesignilicantlydeterioratesthe
perfbnnanceofthepathfbuowingoflheKITEPLANEbecauseofitslargemamwmgOnthecontrary〕this
impnesthattheKITEPLANEissensitivetowindanditisabletobel1tiliァedtoobservewmddirection・Once
thewmdinfmmationisavailable,theperfbmlanceofthe
autopilotsystemwillbeabletobeimproved・Furthelmore,autonomouspathplanningtakingwindintoaccountwnlalsobeabletomakeef6cientfligbt、mfbrmationabout
winditselfisalsorequiredbymanyapplicationssuchasaweatherfbrecast,estimatingthediffUsionofpollution,
preventingalireandsoonTherefbre,amethodtoestimatewind,especiallyitsdirectionwasconsideredmthispapeL
Tbthisend,dynamicsoftheKITEPLANEundeJFwmddismrbancewasderivednrst,andthenamethodtoestimate
parametersofwindwasproposedwhichwasthemamcoLtributionofthispaperForasmallUAVs,WUmodeledthe
dynamlcsasARXmodelandidentiliedthoseparameters
usingmeasuredresultsofHighttest[23]Themodelused
mthispaperwasanonnnearsystemandparameterswereestimatedon1inebysolvinganalgebraiceqUationusingmeasmeddata、
nlordertoshowthevalidityoftheproposedmethod,
resultsofexperimentswereshown・Forexperiments,asmanall-in-onecomputersystemwasdevelopedResultsshowedtheeffectivenessoftheproposedmethod、
ThispaperisorganizedasfbUows、Inthenextsec-
tion(SCC.Ⅱ),theKITEPLANEandthecomputersystemare
shownanddynamicsofthesystemisderivedmthesection
m・Themethodtoestimatewindisproposedmthesection
wandresultsofexperimentsareshowninSeoV、Then,conclusionfbnows(SeQVI).
Krr蔭FLJWE
Ⅱ[二F
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エ/V--~~ ̄~ ̄
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Fig.2,OverviewofKITEPLANESystem
ARILLinux[30]whichwasarealtimeoperatingsystem
basedonLmuxwasusedandlheproposedsystemwas
implementedasarealtinletask・GPSmfbmlationwasavailableoncepcrasecondandothersensoryinfbmla-tionweresampledeach50mseQGmmonitonngsystem
whichinfOmlsoperatorsthestatoftheailPlane・TELNETprotocolwasusedfbrfOrkingtasksonCPUandFTPwasusedfortransferlingdataamongCPUandbasecomputers
astheywereusedinusualLAN
III・DYNAMIcsoFKITEPLANE
ThoughthecompletedynamicsoftheKITEPLANEare
extensivelycomplex,asimplerigidbodymodelisusefUlwhichisshowninthissection
Let‘Gbodyframe,,betheCartesiancoordinatesystemwhichisattachedtotheahplaneandwhoseorigmislocatedatthecenterofthegravity(Fig.3)。Xaxisis
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alignedtothefrontofthebodyandZaxisisalignedtodownwhentheairplanestaysontheground、Yaxisischosenasthebodyframebecomesright-handLet"mertialfiFame,,betheCartesiancoordinatesystemwhichiSfixedontheground、XaxisandYaxisoftheinertialframeare
alignedtoEastandNorthrespectively,Zaxisistowardperpendicular叩rightdirectionDenotethevelocityof
alsofUnctionsofcontrolinputswhichisdenotedasu、Refer[28],[29],[31]fbrfUrtherdetans・
Thedynamics(1),(2),(3)and(4)areabletobesumma-rizedinageneralnonlinearfOnn:
z=f(z)+g(⑳,u)+aujB (5)
り=ん(⑳),
wherez=[[胞陥,WB,EB,QB,RB,X'’昭,Zr,①,e,I1T,yaremeasurableoutputssuchasthepoSition(Xr,Yi,Zr).5⑪BrepresentswinddisturbanceswithrespecttothebodyfraIne・since``wmdframe,,iSolnittedintheabove
modenng,theeffectofattackofanglecausedbywindisalsoincludedin6zUB、
1V・WINDESTIMATION
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theairplaneasVbCandletUB,VbandWDrepresentelementsof吃cwithreSpecttothebodyfiFame、四B,QBandRBrepresentangUlarvelocitieswitllrespecttothebodyframe、既B,PPB,助B,LB,MDandlVEdenoteaerodynamicfblcesandmoments可DeIineZ-Y-XEuler
anglefromtheinertialframetothebodyfTameas⑩,e,⑫anddenoteatransfOrmationmatrixfiomthemertialframe
tothebodyframeasTBI(の,e,⑩)orTBIinshort・ItiseasytoshowthatthereexistsaninverseofTBI,wliich
willbedenotedasTIB,asfarase≠±:、DenotemandIasmassoftheailplaneandaninertiamatrix
respectively、ThepositionofthecenterofthegravityisdenotedbyXr,Z,ZIwithrespecttotheinertialframe、
Let入B=[DB,Vb,W、]TandEB=[ら,OB,RB]T・AssumethewindeffectcanbemodeledasfbrCeSand
momentsaddedtothesystemDenotethemas8LdFBor6LuRBrespectively1Then,byusingabovenotations,dynamicsoftheKnEPLANEcanbegivenasfOUows:
、呈入B+蛇⑭入圏=T・,[M川1,(1)+[FxB,FlrB,町B]T+6町B
Ⅱ暴息.+盲。⑭疋圏-[L戯MajVb]切十`畑(2)基[x血,M]LT埴入。(3)
釜[;H亀s墓+鮒whereq,,勘,Ce,Se,andgrepresentcosU,sinUl,cose,smeandagravitationalacceleration.⑭denotes
outerproduct、SmceaerodynamicfOrcesandmomentsaremainlycausedbywings,FXB,町B,町B,LB,MBandNBarenotonlyfimctionsofthestateoftheairPlanebut
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Fig.6.Sensorylnfbrmation
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[11]mJKoOandS、SastrybqDifferentialHamessbasedfUUauthorityhencOptercontroldesignj,inP"c、qf伽IEEECmfo〃DecCbJzr"J,1999,pp、1982-1987.
[12]H、Shim,TKoo,EHoffinann,andS、Sastry,`iAcomprehensivesmdy
directionsincethisdisadvantagecouldbeinterpretedastheKrrEPLANEwassensitivetowind、FOrthewind
estimation,thedynamicalmodelwasderivedandthe
computationalapploachwasproposed・DevicesfOrexpe匹imentswerealSodevelopedandtheprOposedmethodwasimplementedonthedevelOpedsystem、neresultofanexperimentshowedthevalidityoftheproposedapproach
ForfUtureworks,autopilotsystembyutiUzingthein‐fOrmationaboutwindshouldwasabletobeestimatedis
neededtobedeveloped,sincetheeffectOfwindiscriticalfbrpracticalusesofthemTEPLANE.
ACKNOWLEDGMENT
AuthorswouldliketothanktoS1q/remotelnc・fOrtheirsuperbhelptoimplementthesystemandtomaketestUights・AuthorsarealsoappreciatedtoFUrunoE1ecUicCo、
fbrtheirsupport.
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