簡(jiǎn)介：中文中文5000字文獻(xiàn)出處文獻(xiàn)出處NEUMANND,GRUENDINGERA,JOHAMM,ETALPILOTCOORDINATIONFORLARGESCALEMULTICELLTDDSYSTEMSC//INTERNATIONALITGWORKSHOPONSMARTANTENNASVDE,201416畢業(yè)設(shè)計(jì)論文外文資料翻譯學(xué)院專業(yè)通信工程（嵌入式系統(tǒng)開(kāi)發(fā)）學(xué)生姓名班級(jí)學(xué)號(hào)戶服務(wù)。每個(gè)基站中基站天線的數(shù)量是遠(yuǎn)大于同時(shí)服務(wù)的用戶數(shù)，也就是說(shuō)。我們進(jìn)一步假設(shè)TDD模式中的通信系統(tǒng)和信道是相互支撐的。我們考慮一個(gè)堵塞的衰落信道模型。用表示相干塊中用戶K在單元J到基站I的所有天線合成信道增益的矢量。這些矢量成對(duì)統(tǒng)計(jì)獨(dú)立并且每個(gè)矢量信道都是滿足零均值的高斯分布和協(xié)方差矩陣。對(duì)于每個(gè)符號(hào)，我們采集單位J到基站I中所有K個(gè)用戶的信道矢量作為矩陣HIJ的列。用表示SNR的有效性，用TTR表示可用導(dǎo)頻符號(hào)的數(shù)量，也就是可用的正交導(dǎo)頻序列。在假設(shè)中，訓(xùn)練同時(shí)發(fā)生在所有蜂窩中，感應(yīng)也是同步的，在基站中獲取的訓(xùn)練信號(hào)是由下式給出的（1）式中正交列包括單位J中所有K個(gè)用戶的導(dǎo)頻序列，而且的入口都是假設(shè)獨(dú)立分布和零均值和單位方差的高斯分布。Ⅲ信道估計(jì)信道估計(jì)如果我們?cè)谒蟹涓C中重新使用相同的導(dǎo)頻，比如，根據(jù)公式2估計(jì)，關(guān)聯(lián)獲得的訓(xùn)練導(dǎo)頻和信號(hào)。在基站I中有著最小方形估計(jì)的一致性，在基站中的是白噪聲。由于中的正交行向量，所以轉(zhuǎn)移噪聲矩陣還是滿足零均值和單位方差的獨(dú)立同分布。我們注意到及即使在每個(gè)蜂窩中重新使用了相同的導(dǎo)頻，用戶的導(dǎo)頻分配還是影響了信道估計(jì)。分配的模型由公式公式建模得到，其中是一個(gè)包含著一堆標(biāo)準(zhǔn)正交導(dǎo)頻序列的單一矩陣，是一個(gè)描述符合的蜂窩J的導(dǎo)頻分配。

簡(jiǎn)介：PILOTCOORDINATIONFORLARGESCALEMULTICELLTDDSYSTEMSDAVIDNEUMANN,ANDREASGR¨UNDINGER,MICHAELJOHAM,ANDWOLFGANGUTSCHICKASSOCIATEINSTITUTEFORSIGNALPROCESSING,TECHNISCHEUNIVERSIT¨ATM¨UNCHEN,80290MUNICH,GERMANY{DNEUMANN,GRUENDINGER,JOHAM,UTSCHICK}TUMDEABSTRACTPILOTCONTAMINATIONLIMITSTHEPERFORMANCEOFAMULTICELLTIMEDIVISIONDUPLEXSYSTEMWITHALARGENUMBEROFBASESTATIONANTENNASWESTUDYTHEPOTENTIALBENEFITSOFCOORDINATIONDURINGTHETRAININGPHASEANDWEPROPOSEEFFICIENTALGORITHMSFORPRACTICALSYSTEMSOURDERIVATIONSAREBASEDONRESULTSFROMASYMPTOTICANALYSISANDTHEPRACTICALRELEVANCEISDEMONSTRATEDBYSIMULATIONSWITHREALISTICSYSTEMPARAMETERSIINTRODUCTIONRECENTLY,THEREHASBEENANINCREASINGINTERESTINCELLULARNETWORKSWITHALARGENUMBEROFBASESTATIONANTENNASTHISSOCALLEDMASSIVEMIMOCONCEPTPROMISESHIGHGAINSWITHVERYSIMPLESIGNALPROCESSINGMETHODS1,2THEHIGHNUMBEROFANTENNASMAKESCHANNELESTIMATIONANDFEEDBACKVERYCOSTLYINAFREQUENCYDIVISIONDUPLEXFDDSYSTEMTHUS,MOSTWORKSONTHISTOPICASSUMETIMEDIVISIONDUPLEXTDDSYSTEMS,WHERETHEESTIMATIONOFTHECHANNELTAKESPLACEINANUPLINKTRAININGPHASE1,3–5THATIS,THERESOURCESSPENTONPILOTSDEPENDONTHENUMBEROFSERVEDUSERS,BUTNOTONTHENUMBEROFANTENNASATTHEBASESTATIONFORTHEVERYHIGHANTENNAGAINSINTHESESYSTEMS,THEPERFORMANCEISSEVERELYDEGRADEDBYCHANNELESTIMATIONERRORSDUETOINTERCELLINTERFERENCEINTHETRAININGPHASE,SOCALLEDPILOTCONTAMINATIONITCANBESHOWNTHATTHISINTERFERENCEULTIMATELYLIMITSTHEPERFORMANCEFORUNCOORDINATEDBASESTATIONSWITHAVERYHIGHNUMBEROFANTENNASANDWITHFAVORABLEPROPAGATIONCONDITIONS,IE,INDEPENDENTLYDISTRIBUTEDCHANNELCOEFFICIENTSFOREACHANTENNA1,3,6–9AFEWMETHODSHAVEBEENPROPOSEDTOTACKLETHECONTAMINATIONISSUEINTHEUNCOORDINATEDCASE4,9–11INTHISWORK,WESTUDYTHECOORDINATIONOFPILOTSINTHEUPLINKTRAININGPHASEPREVIOUSWORKONTHISSUBJECTHASBEENDONEIN12,WHEREASTRAIGHTFORWARDGREEDYALGORITHMISPROPOSED,BASEDONTHECHANNELESTIMATIONERRORASPERFORMANCEMETRICTHISAPPROACHISBASEDONASPECIFICSPATIALCHANNELMODELTHATLEADSTOLOWRANKCHANNELCOVARIANCEMATRICESINCONTRASTTOTHISWORK,WEUSERESULTSFROMTHEASYMPTOTICANALYSESIN3AND5TOFORMULATEACOMBINATORIALNETWORKUTILITYMAXIMIZATIONNUMPROBLEMWITHRESPECTTOTHECOORDINATIONSTRATEGYTHUS,OURAPPROACHCANHANDLEARBITRARYCOVARIANCEMATRICESANDWECANSHOWANIMPROVEDPERFORMANCEEVENWHENTHECOVARIANCEMATRICESARESCALEDIDENTITIESWEANALYZEPOSSIBLEBENEFITSFROMPILOTCOORDINATIONBYANOPTIMALALGORITHMBASEDONEXHAUSTIVEENUMERATIONANDPROVIDEEFFICIENTALGORITHMSFORTRAININGCOORDINATIONINPRACTICALSYSTEMSIISYSTEMMODELWECONSIDERACELLULARNETWORKWITHLBASESTATIONS,WHEREEACHBASESTATIONHASMTRANSMITANTENNASANDSERVESKSINGLEANTENNAUSERSTHENUMBEROFBASESTATIONANTENNASISSIGNIFICANTLYLARGERTHANTHENUMBEROFSIMULTANEOUSLYSERVEDUSERSPERBASESTATION,IE,K?MWEFURTHERASSUMETHATTHECOMMUNICATIONSYSTEMISINTDDMODEANDTHATCHANNELRECIPROCITYHOLDSWECONSIDERABLOCKFADINGCHANNELMODELLETHIJK∈CMDENOTETHEVECTOROFCOMPLEXCHANNELGAINSFROMUSERKINCELLJTOALLANTENNASOFBASESTATIONIINONECOHERENCEBLOCKTHESEVECTORSAREPAIRWISESTATISTICALLYINDEPENDENTANDEACHVECTORCHANNELISGAUSSIANDISTRIBUTEDWITHZEROMEANANDCOVARIANCEMATRIXRIJK∈CMMFOREASEOFNOTATION,WECOLLECTTHECHANNELVECTORSOFALLKUSERSINCELLJTOTHEBASESTATIONIASCOLUMNSOFTHEMATRIXHIJLETΡTRDENOTETHEEFFECTIVETRAININGSNRANDTTRTHENUMBEROFAVAILABLEPILOTSYMBOLS,IE,THEAVAILABLENUMBEROFORTHOGONALPILOTSEQUENCESUNDERTHEASSUMPTIONSTHATTHETRAININGTAKESPLACESIMULTANEOUSLYINALLCELLSANDTHERECEPTIONISSYNCHRONIZED,THERECEIVEDTRAININGSIGNALSATBASESTATIONIAREGIVENBYWI√ΡTRL?J1HIJDJNI∈CMTTR1WHERETHEORTHONORMALROWSOFDJ∈CKTTRCONTAINTHEPILOTSEQUENCESFORALLKUSERSINCELLJANDTHEENTRIESOFNIAREASSUMEDTOBEIIDCOMPLEXGAUSSIANDISTRIBUTEDWITHZEROMEANANDUNITVARIANCEIIICHANNELESTIMATIONIFWEREUSETHESAMEPILOTSEQUENCESINALLCELLS,IE,DJˉD?J,ANDCORRELATETHERECEIVEDTRAININGSIGNALSWITHTHEPILOTS,WEOBTAINTHEESTIMATEDUETOˉDHˉDI,YIWI1√ΡTRˉDHL?J1HIJ1√ΡTR?NI2ATBASESTATIONI,THATCOINCIDESWITHTHELEASTSQUARESLSESTIMATEOFTHECHANNELSHII,SINCETHENOISEATTHEBASESTATIONANTENNASISWHITEBECAUSEOFTHEORTHONORMALROWSINˉD,THETRANSFORMEDNOISEMATRIX?NINˉDHSTILLHASIIDENTRIESWITHZEROMEANANDUNITVARIANCEWENOTETHAT,EVENIFWEREUSETHESAMEPILOTSEQUENCESINEACHCELL,THEASSIGNMENTOFTHEPILOTSTOTHEUSERSINFLUENCESΓULIK?1MTRΦIK,IK?21ΡULM1MTRΦIK,IK1M?J,M1MTRRIJMΦIK,IK?J,M∈KΜI,KJ,M?I,K|1MTRΦIK,JM|28ΓDLIKΡIK1MTRΦIK,IK1ΡDLM1M?J,MΡJMTRRJIKΦJM,JM/TRΦJM,JM?J?IMΜI,KΜJ,MΡJM1M|TRΦJM,IK|2/TRΦJM,JM9VIALGORITHMSAEXHAUSTIVEENUMERATIONTOGETANIDEAOFTHEPOTENTIALBENEFITSOFCOORDINATION,WESOLVETHENUMPROBLEMIN10OPTIMALLYBYEXHAUSTIVEENUMERATIONOFALLPOSSIBLEPILOTASSIGNMENTSFORONECELL,THENUMBEROFPOSSIBLEASSIGNMENTSISK?1?K0TTR?KTTRTTR?K11NOTETHATWECANFIXTHEASSIGNMENTOFONECELLWITHOUTAFFECTINGTHEPERFORMANCETHETOTALNUMBEROFPOSSIBLEASSIGNMENTSISTHUS?TTRTTR?K?L?112FORLARGERSYSTEMS,THEENUMERATIONOFALLPOSSIBLEASSIGNMENTSQUICKLYBECOMESCOMPUTATIONALLYINTRACTABLETHUS,WENEEDEFFICIENTALGORITHMSTOMANAGETHETRAININGCOORDINATIONBDEGRADATIONBASEDGREEDYASSIGNMENTTHEFIRSTGREEDYALGORITHMWEINTRODUCEISBASEDONADEGRADATIONMEASUREASPROPOSEDIN13ATEACHITERATIONOFTHEALGORITHM,WEHAVEASETOFUSERSWHICHAREALREADYASSIGNEDTOPILOTSANDASETOFFREEUSERSWHICHSTILLHAVETOBEASSIGNEDINITIALLY,THEUSERSINONECELLAREASSIGNEDRANDOMLY,WHILEALLOTHERUSERSAREFREETHEFIRSTSTEPINEACHITERATIONISTOCALCULATETHEUTILITIESTHATRESULTFROMADDINGEACHOFTHEFREEUSERSTOTHESETOFASSIGNEDUSERSFOREACHPOSSIBLEPILOTTHENFOREACHUSERCALCULATETHEDEGRADATION,IE,AMOUNTOFUTILITYTHATISLOST,WHENTHEUSERONLYGETSTHESECONDBESTPILOTTHEUSERWHICHHASTHEHIGHESTDEGRADATION,IE,THEUSERWHICHISMOSTSENSITIVETOTHECURRENTASSIGNMENT,ISTHENASSIGNEDTOITSBESTPILOTTOCALCULATETHEUTILITIESFORTHEASSIGNEDUSERSTHEUTILITYFUNCTIONHASTOBESEPARABLE,IE,UR?I,KUIKRIK13EACHOFTHEASSIGNEDUSERSISINONEOFTHESETSK1,,KTTRANDTHEPARTIALUTILITYISGIVENBY?UK1,,KTTR?I,K∈?PKPUIKRIK14WHERETHERATESRIKARECALCULATEDUSINGTHEASSIGNMENTSKPFORMALLYWEHAVETHEFOLLOWINGSTEPSLETFDENOTETHESETOFUNASSIGNEDUSERSFOREACHUNASSIGNEDUSERI,K∈FCALCULATETHEOPTIMALPILOTP?IKARGMAXP∈PI?UK1,,KP∪{I,K},,KTTR15ANDDEGRADATIONMEASUREDIK?UK1,,KP?IK∪{I,K},,KTTR?ARGMAXP∈PI,P?P?IK?UK1,,KP∪{I,K},,KTTR16WHEREPIDENOTESTHESETOFSTILLAVAILABLEPILOTSINCELLITHESELECTEDUSERISTHENGIVENBYI?,K?ARGMAXI,K∈FDIK17ANDISASSIGNEDTOITSOPTIMALPILOTKP?I?,K?←KP?I?,K?∪{I?,K?}18PI?←PI?\{P?I?,K?}19F←F\I?,K?20THESESTEPSAREREPEATEDUNTILALLUSERSAREASSIGNED,IE,F?CVARIANCEBASEDGREEDYASSIGNMENTTHEDEGRADATIONBASEDGREEDYALGORITHMSTILLNEEDSALOTOFSINREVALUATIONSFOREACHASSIGNMENTTOFURTHERREDUCECOMPLEXITY,WEPROPOSEANOTHERGREEDYALGORITHM,WHEREWEUSEAHEURISTICTOSELECTTHEMOSTSENSITIVEUSERINAGIVENITERATIONNAMELY,WESELECTTHEUNASSIGNEDUSERWITHTHEWORSTAVERAGECHANNELCONDITIONSINCETHISUSERISMOSTLIKELYTOBEAFFECTEDBYINTERCELLINTERFERENCETHUS,WEAVOIDTHECOSTLYSELECTIONPROCESSOFTHEDEGRADATIONBASEDALGORITHMANDONLYHAVETOSEARCHFORTHEOPTIMALPILOTFORTHESELECTEDUSERDPOSITIONBASEDASSIGNMENTANOTHERPOSSIBLECOORDINATIONSTRATEGYISBASEDONTHEOBSERVATIONTHAT,WITHASIMPLEGEOMETRICPATHLOSSMODEL,WEAKUSERSGENERATEALARGEAMOUNTOFINTERFERENCEINNEIGHBORINGCELLS,WHILESTRONGUSERSGENERATEASMALLAMOUNTOFINTERFERENCETHISMOTIVATESACOORDINATIONSTRATEGYWHICHISONLYBASEDONTHEPOSITIONSOFTHEUSERSANDTHATCANBEAPPLIEDINEACHCELLSEPARATELYLETUSFIRSTASSUMEWEHAVETPK,AONEDIMENSIONALWYNERNETWORKWHERETHECELLSARESEQUENTIALLYINDEXEDWITHI1,,LANDASUFFICIENTLYLARGENUMBEROFUNIFORMLYDISTRIBUTEDUSERSTHECOVARIANCEMATRICESARESCALEDIDENTITIES,

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簡(jiǎn)介：2500英文單詞，英文單詞，13萬(wàn)英文字符萬(wàn)英文字符,中文中文3900字文獻(xiàn)出處文獻(xiàn)出處BUSONOP,ISWAHYUDIA,RAHMANMAA,ETALDESIGNOFEMBEDDEDMICROCONTROLLERFORCONTROLLINGANDMONITORINGBLOODPUMPJPROCEDIACOMPUTERSCIENCE,2015,72217224DESIGNOFEMBEDDEDMICROCONTROLLERFORCONTROLLINGANDMONITORINGBLOODPUMPPRATONDOBUSONO,ANDIISWAHYUDI,MAKBARAULIARAHMAN,ARIOFITRIANTOABSTRACTTHEPERISTALTICPUMPHASAVITALROLEFORTRANSPORTINGTHEBLOODINTHEEXTRACORPOREALCIRCUITOFHEMODIALYSISMACHINESUCHAPUMPCONSITSOFASTEPPERMOTOR,GEARBOXANDROTORSHAFTWITHTWOROLLERATTACHEDONITTHETRANSPORTEDVOLUMEOFTHEPUMPDEPENDSONTHETUBESEGMENTPRESSEDBYROLLERTHEREFORE,THEDEVIATIONINTHEAMOUNTOFDELIVEREDFLUIDMAYOCCURSITISAPROBLEMWHENITISUSEDINTHEMEDICALDEVICEWITHHIGHACCURACYREQUIREMENTSSUCHASHEMODIALYSISMACHINETOOVERCOMESUCHAPROBLEM,THETRANSPORTOFFLUIDNEEDTOBECONTROLLEDTHEAIMOFTHISWORKWASTODESIGNANDIMPLEMENTOFANEMBEDDEDMICROCONTROLLERFORCONTROLLINGANDMONITORINGFLUIDTRANSPORTINTHEPERISTALTICPUMPANELECTRONICHARDWAREWHICHCONSISTSOFSTM32F4DEVELOPMENTBOARD,STEPPERMOTORDRIVERCIRCUIT,CURRENTSENSOR,MAGNETICSENSORANDARTERIALPRESURESENSORCIRCUITSWASDEVELOPEDINPARALLELWITHEMBEDDEDSOFTWAREDEVELOPMENTTHEEMBEDDEDSOFWARECONSISTSOFROUTINESFORMONITORINGCURRENTSENSOR,PRESSURESENSOR,ANDMAGNETICSENSOR,ASWELLASROUTINESFORPUMPSPEEDCONTROLLERTHESTM32F4BOARDWHICHCONSITSOFARMCORTEXM4FMICROCONTROLLERWASCHOSENBECAUSEOFTHETRADEOFFBETWEENPRICE,PERFORMANCE,ANDLOWPOWERCONSUMPTIONTHEPERISTALTICPUMPSYSTEMWASTESTEDWITHTHEMIXTUREOFWATERANDGLYCERINWITHCERTAINCOMPOSISITIONANDHAVINGVISCOSITYSIMULARTOHUMANBLOODTHEVALIDATIONWASALSOBEPERFORMEDBYCOMPARINGTHERESULTSWITHTHEMEASUREMENTCONDUCTEDUSINGTURBINEFLOWMETERTHERESULTSSHOWSTHATTHEPERFORMANCEOFTHECONTROLLERISWORKINGASEXPECTEDKEYWORDBLOODPUMPCONTROLLER,STEPPERMOTOR,MICROCONTROLLER,EMBEDDEDSYSTEM1INTRODUCTIONEMBEDDEDSYSTEMISPLAYINGANIMPORTANTROLEINOURLIFEITISATECHNOLOGYWHICHMAKESOURLIFEMORECOMFORTABLEANDSAFEMOSTEQUIPMENTSUSEDINOURDAILYACTIVITY,RANGINGFROMMEDICALTOCOMMUNICATIONSYSTEMSAREBUILTSUPONEMBEDDEDSYSTEMTHEREFORE,TODAYECONOMYANDSOCIETYWOULDHEAVILYDEPENDONTHEMEMBEDDEDSYSTEMSHAVEDRIVENTHEPRODUCTINNOVATIONANDDIVERSIFICATIONINTERMSOFFUNCTIONALITY,EFFICIENCY,ANDQUALITY1UNLIKEGENERALPURPOSECOMPUTER,EMBEDDEDSYSTEMSAREBUILTFORSPECIFICAPPLICATIONSTHEAPPLICATIONOFEMBEDDEDSYSTEMSINMEDICALAREAFOREXAMPLEISBECOMINGGREATINTERESTSINCEITALLOWSTHECONSTRUCTIONOFCOMPACTDEVICESTHATHELPTHEPHYSICIANINTREATINGTHEPATIENTSWITHTHEINCREASINGPOWEROFPROCESSINGDEVICEASWELLASTHECOMPLEXITYOFCONTROLSYSTEM,WITHTHECURRENTPROCESSINGSYSTEM,ITISPOSSIBLETOINTEGRATENOTONLYTHECONTROLANDMONITORINGACTIVITIES,BUTALSOTOTAKETHEDECISIONTASKSINTOEMBEDDEDSYSTEMSINADDITION,WITHTHEAVAIBILITYOFAGENERALPURPOSERECONFIGURABLEPLATFORM,ITISPOSSIBLETODEVELOPSUCHACOMPLEXSYSTEMWITHREDUCEDTIMEDEVELOPMENTANDGIVERESULTSHAVINGSIMILARCHARACTERISTICSTOOTHERSIMILAREMBEDDEDSYSTEMSTHISSYSTEMISALSOROBUSTANDFULLYRELIABLE,CAPABLEOFWORKINGFOREXTENDEDPERIODSOFTIMEWITHOUTFAILURETHEPERFORMANCEOFEMBEDDEDCONTROLSYSTEMSCANAFFECTEDBYMANYFACTORSITDEPENDSNOTPERISTALTICPUMPINGSYSTEMTHESYSTEMASSHOWNINFIG1CONSISTSOFPERISTALTICPUMPHEAD,STEPPERMOTORWITHGEARBOX,MOTORDRIVERANDCONTROLLERTHEPUMPHEADWASCONSTRUCTEDBYHOUSINGBODYANDAROTORWITHTWOROLLERSATTACHEDONITANELASTICTUBEISFITTEDTOASEMICIRCULARCHAMBERTHATPARTLYSURROUNDSTHEROTORANDTHETRANSFERREDFLUIDGETSINCONTACTONLYWITHTHEINSIDEOFTHETUBINGANDHENCELOWERINGTHERISKOFCONTAMINATION2THETUBESETISCHANGEDBETWEENEACHPATIENTWHENTHEPUMPISINOPERATION,ONEROLLERWILLPRESSTHEELASTICTUBESEGMENTTOTHEHOUSINGANDFORCETHEBLOODTOMOVEFORWARDBEFORETHEFIRSTROLLERREACHESTHEENDOFTHEHOUSINGANDRELEASETHEMANIFOLD,THESECONDROLLERWILLCLOSETUBESEGMENTPREVENTINGTHEBACKFLOW3,4THECOMPRESSIONOFTHEPLASTICTUBEINDUCESARESISTANCEONTHEPUMPMOTORWHICHWILLCREATEARELATIVELYLARGEPRESSUREDISTURBANCEINTHEFLUIDFLOWINORDERTOGETTHEACCURATEBLOODVOLUMETOBETRANSFERRED,CONTROLLINGTHEPUMPSPEEDISIMPORTANTINHEMODIALYSISTHEPUMPSPEEDCANBESETBYCONTROLLINGTHEAMOUNTOFCURRENTSINJECTEDBYTHEELECTRONICMOTORDRIVERSUCHCURRENTSARECONVERTEDTOPWMDUTYCYCLEFORPOWERINGTHEPHASECOILS,ANDHENCECHANGINGTHEMOTORSPEEDSINTHECASEOFPERISTALTICBLOODPUMP,THEPWMDUTYCYCLESARENOTCONSTANTSINCETHELOADISDYNAMICS,DEPENDINGONTHEAMOUNTTRANSFEREDFLUIDVOLUMEFIGURE2SCHEMATICDIAGRAMOFSTEPPERMOTORDRIVER521ELECTRICALMODELSCHEMATICDIAGRAMOFSTEPPERMOTORDRIVERISSHOWNINFIG2IFTWOPHASESTEPPERMOTORUSEDFORDRIVINGTHEPUMP,EACHOFTHETWOELECTRICALPHASESOFTHESTEPPERMOTORCANBEMODELLEDASRLCIRCUITANDBACKELECTROMOTIVEFORCEASFOLLOW5,THEPHASECURRENTIJCANBEMEASUREBYCURRENTSENSORPLACEDCLOSETOTHECOIL22MECHANICALMODELTHEMECHANICALPARTOFTHEMOTORCANBEMODELLEDASARIGIDBODYSUBJECTTOVARIOUSTORQUES5,

簡(jiǎn)介：PROCEDIACOMPUTERSCIENCE722015217–224AVAILABLEONLINEATWWWSCIENCEDIRECTCOM18770509?2015PUBLISHEDBYELSEVIERBVTHISISANOPENACCESSARTICLEUNDERTHECCBYNCNDLICENSEHTTP//CREATIVECOMMONSORG/LICENSES/BYNCND/40/PEERREVIEWUNDERRESPONSIBILITYOFORGANIZINGCOMMITTEEOFINFORMATIONSYSTEMSINTERNATIONALCONFERENCEISICO2015DOI101016/JPROCS201512134SCIENCEDIRECTTHETHIRDINFORMATIONSYSTEMSINTERNATIONALCONFERENCEDESIGNOFEMBEDDEDMICROCONTROLLERFORCONTROLLINGANDMONITORINGBLOODPUMPPRATONDOBUSONOA,ANDIISWAHYUDIB,MAKBARAULIARAHMANB,ARIOFITRIANTOAACENTERFORINFORMATIONANDCOMMUNICATIONTECHNOLOGY,BPPT,KAWASANPUSPIPTEKSERPONG,TANGERANG,INDONESIABDEPARTMENTOFELECTRICALENGINNERING,UNIVERSITYOFALAZHARINDONESIA,JAKARTA,INDONESIAABSTRACTTHEPERISTALTICPUMPHASAVITALROLEFORTRANSPORTINGTHEBLOODINTHEEXTRACORPOREALCIRCUITOFHEMODIALYSISMACHINESUCHAPUMPCONSITSOFASTEPPERMOTOR,GEARBOXANDROTORSHAFTWITHTWOROLLERATTACHEDONITTHETRANSPORTEDVOLUMEOFTHEPUMPDEPENDSONTHETUBESEGMENTPRESSEDBYROLLERTHEREFORE,THEDEVIATIONINTHEAMOUNTOFDELIVEREDFLUIDMAYOCCURSITISAPROBLEMWHENITISUSEDINTHEMEDICALDEVICEWITHHIGHACCURACYREQUIREMENTSSUCHASHEMODIALYSISMACHINETOOVERCOMESUCHAPROBLEM,THETRANSPORTOFFLUIDNEEDTOBECONTROLLEDTHEAIMOFTHISWORKWASTODESIGNANDIMPLEMENTOFANEMBEDDEDMICROCONTROLLERFORCONTROLLINGANDMONITORINGFLUIDTRANSPORTINTHEPERISTALTICPUMPANELECTRONICHARDWAREWHICHCONSISTSOFSTM32F4DEVELOPMENTBOARD,STEPPERMOTORDRIVERCIRCUIT,CURRENTSENSOR,MAGNETICSENSORANDARTERIALPRESURESENSORCIRCUITSWASDEVELOPEDINPARALLELWITHEMBEDDEDSOFTWAREDEVELOPMENTTHEEMBEDDEDSOFWARECONSISTSOFROUTINESFORMONITORINGCURRENTSENSOR,PRESSURESENSOR,ANDMAGNETICSENSOR,ASWELLASROUTINESFORPUMPSPEEDCONTROLLERTHESTM32F4BOARDWHICHCONSITSOFARMCORTEXM4FMICROCONTROLLERWASCHOSENBECAUSEOFTHETRADEOFFBETWEENPRICE,PERFORMANCE,ANDLOWPOWERCONSUMPTIONTHEPERISTALTICPUMPSYSTEMWASTESTEDWITHTHEMIXTUREOFWATERANDGLYCERINWITHCERTAINCOMPOSISITIONANDHAVINGVISCOSITYSIMULARTOHUMANBLOODTHEVALIDATIONWASALSOBEPERFORMEDBYCOMPARINGTHERESULTSWITHTHEMEASUREMENTCONDUCTEDUSINGTURBINEFLOWMETERTHERESULTSSHOWSTHATTHEPERFORMANCEOFTHECONTROLLERISWORKINGASEXPECTED?2015PUBLISHEDBYELSEVIERLTDSELECTIONAND/ORPEERREVIEWUNDERRESPONSIBILITYOFTHESCIENTIFICCOMMITTEEOFTHETHIRDINFORMATIONSYSTEMSINTERNATIONALCONFERENCEISICO2015KEYWORDBLOODPUMPCONTROLLER,STEPPERMOTOR,MICROCONTROLLER,EMBEDDEDSYSTEM?2015PUBLISHEDBYELSEVIERBVTHISISANOPENACCESSARTICLEUNDERTHECCBYNCNDLICENSEHTTP//CREATIVECOMMONSORG/LICENSES/BYNCND/40/PEERREVIEWUNDERRESPONSIBILITYOFORGANIZINGCOMMITTEEOFINFORMATIONSYSTEMSINTERNATIONALCONFERENCEISICO2015219PRATONDOBUSONOETAL/PROCEDIACOMPUTERSCIENCE722015217–2242PERISTALTICBLOODPUMPSYSTEMINTHEEXTRACORPOREALCIRCUITOFHEMODIALYSISMACHINES,THEBLOODFLOWISTRANSPORTEDBYAPERISTALTICPUMPINGSYSTEMTHESYSTEMASSHOWNINFIG1CONSISTSOFPERISTALTICPUMPHEAD,STEPPERMOTORWITHGEARBOX,MOTORDRIVERANDCONTROLLERTHEPUMPHEADWASCONSTRUCTEDBYHOUSINGBODYANDAROTORWITHTWOROLLERSATTACHEDONITANELASTICTUBEISFITTEDTOASEMICIRCULARCHAMBERTHATPARTLYSURROUNDSTHEROTORANDTHETRANSFERREDFLUIDGETSINCONTACTONLYWITHTHEINSIDEOFTHETUBINGANDHENCELOWERINGTHERISKOFCONTAMINATION2THETUBESETISCHANGEDBETWEENEACHPATIENTWHENTHEPUMPISINOPERATION,ONEROLLERWILLPRESSTHEELASTICTUBESEGMENTTOTHEHOUSINGANDFORCETHEBLOODTOMOVEFORWARDBEFORETHEFIRSTROLLERREACHESTHEENDOFTHEHOUSINGANDRELEASETHEMANIFOLD,THESECONDROLLERWILLCLOSETUBESEGMENTPREVENTINGTHEBACKFLOW3,4THECOMPRESSIONOFTHEPLASTICTUBEINDUCESARESISTANCEONTHEPUMPMOTORWHICHWILLCREATEARELATIVELYLARGEPRESSUREDISTURBANCEINTHEFLUIDFLOWFIGURE1PERISTALTICBLOODPUMPSYSTEMINORDERTOGETTHEACCURATEBLOODVOLUMETOBETRANSFERRED,CONTROLLINGTHEPUMPSPEEDISIMPORTANTINHEMODIALYSISTHEPUMPSPEEDCANBESETBYCONTROLLINGTHEAMOUNTOFCURRENTSINJECTEDBYTHEELECTRONICMOTORDRIVERSUCHCURRENTSARECONVERTEDTOPWMDUTYCYCLEFORPOWERINGTHEPHASECOILS,ANDHENCECHANGINGTHEMOTORSPEEDSINTHECASEOFPERISTALTICBLOODPUMP,THEPWMDUTYCYCLESARENOTCONSTANTSINCETHELOADISDYNAMICS,DEPENDINGONTHEAMOUNTTRANSFEREDFLUIDVOLUME21ELECTRICALMODELSCHEMATICDIAGRAMOFSTEPPERMOTORDRIVERISSHOWNINFIG2IFTWOPHASESTEPPERMOTORUSEDFORDRIVINGTHEPUMP,EACHOFTHETWOELECTRICALPHASESOFTHESTEPPERMOTORCANBEMODELLEDASRLCIRCUITANDBACKELECTROMOTIVEFORCEASFOLLOW5,TUTETIRDTTDILJJJWJW????FORJA,B1WHEREMMMAPKTE??SIN??2MMMBPKTE??SIN?3CONTROLLERPERISTALTICPUMPSTEPPERMOTORMOTORDRIVER

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