步进电机的细分驱动及动态性能仿真_第1页
步进电机的细分驱动及动态性能仿真_第2页
步进电机的细分驱动及动态性能仿真_第3页
步进电机的细分驱动及动态性能仿真_第4页
步进电机的细分驱动及动态性能仿真_第5页
已阅读5页,还剩20页未读 继续免费阅读

下载本文档

版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领

文档简介

步进电机的细分驱动及动态性能仿真一、本文概述Overviewofthisarticle随着现代工业技术的不断发展,步进电机作为一种高精度、高效率的驱动方式,在工业自动化、机器人、医疗设备等领域得到了广泛应用。然而,步进电机的驱动控制技术一直是其应用的关键问题之一。其中,细分驱动技术作为一种重要的控制策略,能够显著提高步进电机的动态性能和运行精度。本文旨在探讨步进电机的细分驱动技术,并通过对动态性能的仿真分析,为步进电机的优化设计和应用提供理论支持。Withthecontinuousdevelopmentofmodernindustrialtechnology,steppermotorshavebeenwidelyusedasahigh-precisionandhigh-efficiencydrivingmethodinfieldssuchasindustrialautomation,robotics,andmedicalequipment.However,thedrivingcontroltechnologyofsteppermotorshasalwaysbeenoneofthekeyissuesintheirapplication.Amongthem,subdivisiondrivetechnology,asanimportantcontrolstrategy,cansignificantlyimprovethedynamicperformanceandoperationalaccuracyofsteppermotors.Thisarticleaimstoexplorethesubdivisiondrivingtechnologyofsteppermotors,andprovidetheoreticalsupportfortheoptimizationdesignandapplicationofsteppermotorsthroughsimulationanalysisofdynamicperformance.文章首先介绍了步进电机的基本工作原理和驱动方式,阐述了细分驱动技术的基本原理和实现方法。在此基础上,文章重点分析了细分驱动对步进电机动态性能的影响,包括转矩波动、速度响应、定位精度等方面的性能改善。通过仿真模型的建立和分析,文章深入探讨了不同细分级别下步进电机的动态特性,以及细分驱动参数对电机性能的影响规律。Thearticlefirstintroducesthebasicworkingprincipleanddrivingmethodofsteppermotors,andelaboratesonthebasicprincipleandimplementationmethodofsubdivisiondrivingtechnology.Onthisbasis,thearticlefocusesonanalyzingtheimpactofsubdivisiondrivingonthedynamicperformanceofsteppermotors,includingperformanceimprovementsintorqueripple,speedresponse,positioningaccuracy,andotheraspects.Throughtheestablishmentandanalysisofsimulationmodels,thearticledelvesintothedynamiccharacteristicsofsteppermotorsatdifferentsubdivisionlevels,aswellastheimpactofsubdivisiondrivingparametersonmotorperformance.文章总结了细分驱动技术在步进电机控制中的应用价值和前景,提出了进一步优化细分驱动技术的建议。本文的研究成果不仅有助于加深对步进电机驱动控制技术的理解,也为步进电机的设计、优化和应用提供了有益的参考。Thearticlesummarizestheapplicationvalueandprospectsofsubdivisiondrivetechnologyinsteppermotorcontrol,andputsforwardsuggestionsforfurtheroptimizingsubdivisiondrivetechnology.Theresearchfindingsofthisarticlenotonlycontributetoadeeperunderstandingofsteppermotordrivecontroltechnology,butalsoprovideusefulreferencesforthedesign,optimization,andapplicationofsteppermotors.二、步进电机的工作原理Theworkingprincipleofsteppermotors步进电机是一种特殊的电机,其旋转角度与输入的脉冲数成正比,因此也被称为脉冲电机。步进电机的工作原理主要基于电磁效应和磁场转换。其核心部件包括一个定子和一个转子,定子通常由多个电磁极组成,而转子则带有永磁体。Asteppermotorisaspecialtypeofmotorwhoserotationangleisdirectlyproportionaltothenumberofinputpulses,henceitisalsoknownasapulsemotor.Theworkingprincipleofsteppermotorsismainlybasedonelectromagneticeffectsandmagneticfieldconversion.Itscorecomponentsincludeastatorandarotor,whichareusuallycomposedofmultipleelectromagneticpoles,whiletherotorhasapermanentmagnet.当步进电机的定子中的一个电磁极被通电时,它会产生一个磁场,这个磁场会与转子上的永磁体产生相互作用,从而使转子向该电磁极的方向旋转一个小角度。然后,通过顺序地给不同的电磁极通电,可以使转子一步步地旋转,从而实现对步进电机的精确控制。Whenanelectromagneticpoleinthestatorofasteppermotorisenergized,itgeneratesamagneticfieldthatinteractswiththepermanentmagnetontherotor,causingtherotortorotateasmallangleinthedirectionoftheelectromagneticpole.Then,bysequentiallyenergizingdifferentelectromagneticpoles,therotorcanrotatestepbystep,achievingprecisecontrolofthesteppermotor.步进电机的旋转角度通常被称为步距角,它取决于电机的设计和制造。例如,如果一个步进电机有50个电磁极,并且每个电磁极的通电会使转子旋转8度,那么该电机的步距角就是8度。Therotationangleofasteppermotorisusuallyreferredtoasthestepangle,whichdependsonthedesignandmanufacturingofthemotor.Forexample,ifasteppermotorhas50electromagneticpolesandeachpoleisenergizedtorotatetherotorby8degrees,thenthestepangleofthemotoris8degrees.步进电机的优点在于其精确的角度控制和高的启动扭矩。然而,由于其在旋转过程中存在离散的步距,因此其旋转速度可能会受到限制,并且可能会产生振动和噪音。因此,对于需要高精度和高速度的应用,通常需要对步进电机进行细分驱动,以提高其动态性能。Theadvantagesofsteppermotorslieintheirpreciseanglecontrolandhighstartingtorque.However,duetothepresenceofdiscretesteplengthsduringitsrotation,itsrotationalspeedmaybelimitedandmaygeneratevibrationandnoise.Therefore,forapplicationsthatrequirehighprecisionandspeed,itisusuallynecessarytofinelydrivethesteppermotortoimproveitsdynamicperformance.三、细分驱动技术Segmentationdriventechnology细分驱动技术是对步进电机进行高精度控制的一种重要手段。传统的步进电机驱动方式中,电机每步的转动角度是固定的,这限制了电机的精度和动态性能。而细分驱动技术通过对电机电流的精确控制,使得电机可以在每步之间实现微小的角度变化,从而大大提高了电机的分辨率和动态性能。Subdivisiondrivetechnologyisanimportantmeansofhigh-precisioncontrolforsteppermotors.Inthetraditionalsteppermotordrivemethod,therotationangleofeachstepofthemotorisfixed,whichlimitstheaccuracyanddynamicperformanceofthemotor.Thesubdivisiondrivingtechnologyachievesprecisecontrolofmotorcurrent,allowingthemotortoachievesmallanglechangesbetweeneachstep,greatlyimprovingtheresolutionanddynamicperformanceofthemotor.细分驱动技术的核心在于对电机电流的精确控制。通过调整电流的大小和波形,可以实现对电机转动角度的精确控制。细分驱动的实现方式主要有两种:一种是基于模拟电路的控制方式,另一种是基于数字电路的控制方式。Thecoreofsubdivisiondrivetechnologyliesinprecisecontrolofmotorcurrent.Byadjustingthemagnitudeandwaveformofthecurrent,precisecontrolofthemotor'srotationanglecanbeachieved.Therearetwomainwaystoimplementsubdivisiondrive:oneisbasedonanalogcircuitcontrol,andtheotherisbasedondigitalcircuitcontrol.基于模拟电路的控制方式主要通过模拟电路实现对电机电流的精确控制。这种方式需要设计复杂的模拟电路,对电路元件的精度要求较高,同时容易受到温度、噪声等因素的影响,稳定性较差。Thecontrolmethodbasedonanalogcircuitsmainlyachievesprecisecontrolofmotorcurrentthroughanalogcircuits.Thisapproachrequiresthedesignofcomplexanalogcircuits,whichrequirehighaccuracyofcircuitcomponentsandareeasilyaffectedbyfactorssuchastemperatureandnoise,resultinginpoorstability.基于数字电路的控制方式则通过数字信号处理器(DSP)或微控制器等数字电路实现对电机电流的精确控制。这种方式具有更高的控制精度和稳定性,同时可以通过编程实现更复杂的控制策略,具有更大的灵活性。Thecontrolmethodbasedondigitalcircuitsachievesprecisecontrolofmotorcurrentthroughdigitalcircuitssuchasdigitalsignalprocessors(DSP)ormicrocontrollers.Thismethodhashighercontrolaccuracyandstability,andcanalsoachievemorecomplexcontrolstrategiesthroughprogramming,withgreaterflexibility.在细分驱动技术中,驱动器的设计是实现高精度控制的关键。驱动器需要能够精确控制电机的电流,同时需要具有良好的动态响应性能。驱动器的散热性能也是需要考虑的重要因素,因为电机在工作过程中会产生大量的热量,如果散热不良,会影响驱动器的稳定性和可靠性。Insubdivisiondrivetechnology,thedesignofthedriveristhekeytoachievinghigh-precisioncontrol.Thedriverneedstobeabletoaccuratelycontrolthecurrentofthemotorandhavegooddynamicresponseperformance.Theheatdissipationperformanceofthedriveisalsoanimportantfactortoconsider,asthemotorgeneratesalargeamountofheatduringoperation.Iftheheatdissipationispoor,itwillaffectthestabilityandreliabilityofthedrive.通过细分驱动技术,步进电机的动态性能可以得到显著的提升。细分驱动可以提高电机的分辨率,使得电机可以在更小的角度范围内进行精确的控制。细分驱动可以降低电机的转矩波动,提高电机的平稳性。细分驱动可以提高电机的启动和停止特性,使得电机可以在更短的时间内达到稳定的运行状态。Throughsubdivisiondrivingtechnology,thedynamicperformanceofsteppermotorscanbesignificantlyimproved.Subdivisiondrivingcanimprovetheresolutionofthemotor,enablingprecisecontrolofthemotorwithinasmalleranglerange.Subdivisiondrivecanreducetorquefluctuationsofthemotorandimproveitssmoothness.Segmenteddrivingcanimprovethestartingandstoppingcharacteristicsofthemotor,enablingittoreachastableoperatingstateinashorterperiodoftime.为了验证细分驱动技术的有效性,需要进行动态性能仿真。通过仿真,可以模拟电机在不同驱动方式下的运行状态,比较不同驱动方式的性能差异。仿真还可以帮助优化驱动器的设计,提高电机的动态性能。Toverifytheeffectivenessofsubdivisiondrivingtechnology,dynamicperformancesimulationisrequired.Throughsimulation,theoperatingstatusofthemotorcanbesimulatedunderdifferentdrivingmodes,andtheperformancedifferencesofdifferentdrivingmodescanbecompared.Simulationcanalsohelpoptimizethedesignofthedriverandimprovethedynamicperformanceofthemotor.细分驱动技术是提高步进电机动态性能的重要手段。通过精确控制电机的电流,可以实现电机的高精度控制。驱动器的设计也是实现高精度控制的关键。通过动态性能仿真,可以验证细分驱动技术的有效性,并优化驱动器的设计。Subdivisiondrivingtechnologyisanimportantmeanstoimprovethedynamicperformanceofsteppermotors.Bypreciselycontrollingthecurrentofthemotor,high-precisioncontrolofthemotorcanbeachieved.Thedesignofthedriverisalsocrucialforachievinghigh-precisioncontrol.Throughdynamicperformancesimulation,theeffectivenessofsubdivisiondrivingtechnologycanbeverifiedandthedesignofthedrivercanbeoptimized.四、动态性能仿真Dynamicperformancesimulation步进电机的动态性能是其在实际应用中表现优劣的关键指标。为了深入了解步进电机在细分驱动下的动态性能,我们进行了详细的仿真研究。Thedynamicperformanceofsteppermotorsisakeyindicatoroftheirperformanceinpracticalapplications.Inordertogainadeeperunderstandingofthedynamicperformanceofsteppermotorsundersubdivisiondriving,weconducteddetailedsimulationstudies.我们建立了步进电机的数学模型,包括其电气特性和机械特性。在此基础上,我们利用MATLAB/Simulink软件平台,构建了步进电机的动态仿真模型。模型充分考虑了电机内部的电感、电阻、反电动势等因素,以及外部环境对电机的影响,如负载转矩、摩擦力等。Wehaveestablishedamathematicalmodelofasteppermotor,includingitselectricalandmechanicalcharacteristics.Onthisbasis,weconstructedadynamicsimulationmodelofthesteppermotorusingtheMATLAB/Simulinksoftwareplatform.Themodelfullyconsidersfactorssuchasinductance,resistance,backelectromotiveforceinsidethemotor,aswellastheinfluenceofexternalenvironmentonthemotor,suchasloadtorque,friction,etc.在仿真模型中,我们设定了不同的细分驱动参数,如细分步数、电流波形等,以观察其对电机动态性能的影响。通过仿真,我们得到了电机在不同参数下的转速、转矩、电流等关键指标的变化曲线。Inthesimulationmodel,wesetdifferentsubdivisiondrivingparameters,suchassubdivisionsteps,currentwaveform,etc.,toobservetheirimpactonthedynamicperformanceofthemotor.Throughsimulation,weobtainedthevariationcurvesofkeyindicatorssuchasspeed,torque,andcurrentofthemotorunderdifferentparameters.仿真结果表明,细分驱动技术可以显著提高步进电机的动态性能。随着细分步数的增加,电机的转速波动和转矩脉动明显减小,运行更加平稳。同时,合理的电流波形设计也可以进一步优化电机的动态性能。Thesimulationresultsshowthatsubdivisiondrivingtechnologycansignificantlyimprovethedynamicperformanceofsteppermotors.Asthenumberofsubdivisionstepsincreases,thespeedfluctuationandtorquerippleofthemotoraresignificantlyreduced,andtheoperationbecomessmoother.Meanwhile,areasonablecurrentwaveformdesigncanfurtheroptimizethedynamicperformanceofthemotor.我们还对电机在不同负载条件下的动态性能进行了仿真研究。仿真结果显示,步进电机在细分驱动下具有较好的负载适应能力,能够在较宽的负载范围内保持稳定的动态性能。Wealsoconductedsimulationstudiesonthedynamicperformanceofthemotorunderdifferentloadconditions.Thesimulationresultsshowthatthesteppermotorhasgoodloadadaptabilityundersubdivisiondriving,andcanmaintainstabledynamicperformanceoverawideloadrange.通过动态性能仿真,我们深入了解了步进电机在细分驱动下的运行特性,为优化电机设计、提高电机性能提供了有力的理论支持。仿真结果也为步进电机的实际应用提供了有益的参考。Throughdynamicperformancesimulation,wehavegainedadeepunderstandingoftheoperatingcharacteristicsofsteppermotorsundersubdivisiondriving,providingstrongtheoreticalsupportforoptimizingmotordesignandimprovingmotorperformance.Thesimulationresultsalsoprovideusefulreferencesforthepracticalapplicationofsteppermotors.五、步进电机的细分驱动与动态性能仿真Subdivisiondrivinganddynamicperformancesimulationofsteppermotors步进电机作为一种特殊的电机类型,在工业自动化、机器人技术、精密控制等领域具有广泛的应用。细分驱动技术是改善步进电机性能的重要手段,而动态性能仿真则有助于在设计和优化阶段对步进电机的性能进行预测和评估。Asaspecialtypeofmotor,steppermotorshavewideapplicationsinindustrialautomation,roboticstechnology,precisioncontrol,andotherfields.Subdivisiondrivingtechnologyisanimportantmeanstoimprovetheperformanceofsteppermotors,anddynamicperformancesimulationhelpspredictandevaluatetheperformanceofsteppermotorsduringthedesignandoptimizationstages.细分驱动技术主要通过在步进电机的每一步之间插入多个微小的位移,使得电机的运动更加平滑,减少步进电机的振动和噪音。同时,细分驱动还可以提高步进电机的分辨率和精度,使其能够满足更高精度的控制要求。实现细分驱动的关键在于对电机的电流进行精确控制,这通常通过细分驱动器实现。Thesubdivisiondrivingtechnologymainlyinsertsmultiplesmalldisplacementsbetweeneachstepofthesteppermotor,makingthemotor'smotionsmootherandreducingthevibrationandnoiseofthesteppermotor.Meanwhile,subdivisiondrivecanalsoimprovetheresolutionandaccuracyofsteppermotors,enablingthemtomeethigherprecisioncontrolrequirements.Thekeytoachievingsubdivisiondriveliesinprecisecontrolofthemotor'scurrent,whichisusuallyachievedthroughsubdivisiondrives.动态性能仿真则是通过计算机模拟步进电机在实际工作环境中的运动状态,从而评估其性能。动态性能仿真可以模拟步进电机在各种负载和速度下的运行情况,预测其动态响应、稳定性、振动和噪音等关键性能指标。通过仿真,我们可以对步进电机的设计进行优化,提高其性能,降低制造成本。Dynamicperformancesimulationevaluatestheperformanceofasteppermotorbysimulatingitsmotionstateintheactualworkingenvironmentusingacomputer.Dynamicperformancesimulationcansimulatetheoperationofsteppermotorsundervariousloadsandspeeds,andpredictkeyperformanceindicatorssuchasdynamicresponse,stability,vibration,andnoise.Throughsimulation,wecanoptimizethedesignofsteppermotors,improvetheirperformance,andreducemanufacturingcosts.为了实现步进电机的动态性能仿真,需要建立准确的数学模型,包括电机的电气模型、机械模型和控制系统模型。然后,利用仿真软件对模型进行求解,得到步进电机在各种条件下的动态性能。仿真结果可以为步进电机的设计、优化和控制提供重要的参考依据。Inordertoachievedynamicperformancesimulationofsteppermotors,itisnecessarytoestablishaccuratemathematicalmodels,includingtheelectricalmodel,mechanicalmodel,andcontrolsystemmodelofthemotor.Then,usesimulationsoftwaretosolvethemodelandobtainthedynamicperformanceofthesteppermotorundervariousconditions.Thesimulationresultscanprovideimportantreferenceforthedesign,optimization,andcontrolofsteppermotors.细分驱动技术和动态性能仿真都是提高步进电机性能的重要手段。随着技术的不断发展,这两种方法将在步进电机的设计、制造和控制中发挥越来越重要的作用。Subdivisiondrivingtechnologyanddynamicperformancesimulationareimportantmeanstoimprovetheperformanceofsteppermotors.Withthecontinuousdevelopmentoftechnology,thesetwomethodswillplayanincreasinglyimportantroleinthedesign,manufacturing,andcontrolofsteppermotors.六、案例分析Caseanalysis为了具体阐述步进电机的细分驱动及其动态性能,我们将通过一个实际案例进行分析。Inordertoelaborateonthesubdivisiondriveanddynamicperformanceofsteppermotorsindetail,wewillanalyzeitthroughapracticalcasestudy.案例背景:某自动化设备制造商需要为其新型高精度机械臂选择适合的步进电机驱动方案。该机械臂需要在狭小空间内实现快速、准确的定位和旋转,因此对步进电机的动态性能和稳定性有较高要求。Casebackground:Acertainautomationequipmentmanufacturerneedstochooseasuitablesteppermotordriveschemeforitsnewhigh-precisionroboticarm.Theroboticarmneedstoachievefastandaccuratepositioningandrotationinanarrowspace,thusrequiringhighdynamicperformanceandstabilityofthesteppermotor.考虑到机械臂的精度和动态性能需求,我们选择了细分驱动方案。通过细分驱动器,我们可以将步进电机的步距角进一步细分,从而提高其控制精度。在本案例中,我们选择了将步距角细分为原来的1/16,即每步转动的角度为原来的1/16,这样可以在不增加电机数量的情况下,实现更高的定位精度。Consideringtheprecisionanddynamicperformancerequirementsoftheroboticarm,wehavechosenasubdivisiondrivescheme.Bysubdividingthedriver,wecanfurthersubdividethestepangleofthesteppermotor,therebyimprovingitscontrolaccuracy.Inthiscase,wechosetosubdividethestepangleinto1/16oftheoriginal,thatis,therotationangleofeachstepis1/16oftheoriginal,whichcanachievehigherpositioningaccuracywithoutincreasingthenumberofmotors.为了验证细分驱动方案的有效性,我们进行了动态性能仿真。通过仿真软件,我们模拟了机械臂在不同负载、不同速度下的运动情况,并观察了步进电机的动态响应。仿真结果表明,在细分驱动方案下,步进电机的动态性能得到了显著提升,机械臂的定位精度和稳定性均得到了明显改善。Toverifytheeffectivenessofthesubdivisiondrivingscheme,weconducteddynamicperformancesimulations.Throughsimulationsoftware,wesimulatedthemotionoftheroboticarmunderdifferentloadsandspeeds,andobservedthedynamicresponseofthesteppermotor.Thesimulationresultsshowthatunderthesubdivisiondrivingscheme,thedynamicperformanceofthesteppermotorhasbeensignificantlyimproved,andthepositioningaccuracyandstabilityoftheroboticarmhavebeensignificantlyimproved.在实际应用中,采用细分驱动方案的步进电机为机械臂提供了稳定的动力输出和精确的定位能力。机械臂在狭小空间内的运动更加灵活、准确,满足了制造商对设备性能的要求。细分驱动方案还降低了机械臂的噪音和振动,提高了设备的整体可靠性。Inpracticalapplications,thesteppermotorusingasubdivisiondriveschemeprovidesstablepoweroutputandprecisepositioningcapabilityfortheroboticarm.Themovementoftheroboticarminnarrowspacesismoreflexibleandaccurate,meetingthemanufacturer'srequirementsforequipmentperformance.Thesegmenteddrivingschemealsoreducesthenoiseandvibrationoftheroboticarm,improvingtheoverallreliabilityoftheequipment.通过案例分析,我们验证了步进电机细分驱动方案在提高动态性能和稳定性方面的有效性。对于需要高精度、高稳定性控制的自动化设备而言,细分驱动方案是一种值得推广和应用的技术手段。Throughcaseanalysis,wehaveverifiedtheeffectivenessofthesubdivisiondriveschemeforsteppermotorsinimprovingdynamicperformanceandstability.Forautomationequipmentthatrequireshigh-precisionandhighstabilitycontrol,thesubdivisiondriveschemeisatechnicalmeansworthpromotingandapplying.七、结论与展望ConclusionandOutlook本文深入探讨了步进电机的细分驱动技术及其动态性能仿真。通过对步进电机的工作原理、驱动方式以及细分驱动技术的细致分析,我们明确了细分驱动在提高步进电机性能方面的重要作用。借助动态性能仿真技术,我们有效地预测和评估了不同细分驱动策略下的电机性能表现,为步进电机的优化设计提供了有力支持。Thisarticledelvesintothesubdivisiondrivingtechnologyofsteppermotorsanditsdynamicperformancesimulation.Throughadetailedanalysisoftheworkingprinciple,drivingmethod,andsubdivisiondrivingtechnologyofsteppermotors,wehaveidentifiedtheimportantroleofsubdivisiondrivinginimprovingtheperformanceofsteppermotors.Withthehelpofdynamicperformancesimulationtechnology,weeffectivelypredictedandevaluatedthemotorperformanceunderdifferentsubdivisiondrivingstrategies,providingstrongsupportfortheoptimizationdesignofsteppermotors.结论部分,本文的主要研究工作和成果可以总结为以下几点:我们系统地梳理了步进电机的驱动技术,特别是细分驱动技术的发展现状,为后续研究提供了理论基础。我们详细阐述了细分驱动技术的原理和实现方法,并通过实验验证了其在提高步进电机分辨率、减小步距角以及降低转矩波动等方面的有效性。通过动态性能仿真,我们深入探讨了不同细分驱动策略对电机动态性能的影响,为步进电机的实际应用提供了有益的参考。Intheconclusionsection,themainresearchworkandachievementsofthisarticlecanbesummarizedasfollows:Wesystematicallyreviewedthedrivingtechnologyofsteppermotors,especiallythedevelopmentstatusofsubdivisiondrivingtechnology,providingatheoreticalbasisforsubsequentresearch.Wehaveelaboratedontheprincipleandimplementationmethodofsubdivisiondrivingtechnology,andverifieditseffectivenessinimprovingtheresolutionofsteppermotors,reducingstepangle,andreducingtorquefluctuationsthroughexperiments.Throughdynamicperformancesimulation,wehavedelvedintotheimpactofdifferentsub

温馨提示

  • 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
  • 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
  • 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
  • 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
  • 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
  • 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
  • 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

评论

0/150

提交评论