




已閱讀5頁,還剩4頁未讀, 繼續(xù)免費(fèi)閱讀
版權(quán)說明:本文檔由用戶提供并上傳,收益歸屬內(nèi)容提供方,若內(nèi)容存在侵權(quán),請進(jìn)行舉報(bào)或認(rèn)領(lǐng)
文檔簡介
翻譯英文DSPControlofElectro-HydraulicServoActuatorsRichardPoleyDSPFieldApplicationsABSTRACTHydraulicactuatorsarecharacterizedbytheirabilitytoimpartlargeforcesathighspeedsandareusedinmanyindustrialmotionsystems.Inapplicationswheregooddynamicperformanceisimportantitiscommontocontaintheactuatorinaservoloopcomprisingafeedbacktransducerandelectroniccontroller.Themajorityofelectronicservo-controllersusedinthesesystemsareanaloguebasedimplementationsofthewell-knownPIDtype.However,therequirementtoimplementadvancedcontrolstrategieshasledtoanincreasedinterestintheuseofdigitalsignalprocessors(DSPs)inthisfield.Onedesignapproachwhichmeritsspecialconsiderationistheuseofcomputersimulationsoftwaretomodelthehydraulicplantandelectronicservo-controller,andtogenerateandtestembeddedcodeforthetargetDSP.Thisapplicationreportdiscussessomeoftheissuesinvolvedincontrollinglinearhydraulicactuators,andthesuitabilityoftheTMS320C28xDSPforsuchsystems.1IntroductionTherangeofapplicationsforelectro-hydraulicservosystemsisdiverse,andincludesmanufacturingsystems,materialstestmachines,activesuspensionsystems,miningmachinery,fatiguetesting,flightsimulation,papermachines,shipsandelectromagneticmarineengineering,injectionmouldingmachines,robotics,andsteelandaluminiummillequipment.Hydraulicsystemsarealsocommoninaircraft,wheretheirhighpower-to-weightratioandprecisecontrolmakesthemanidealchoiceforactuationofflightsurfaces.Althoughelectricalmotorsaresometimesusedinmanyoftheseapplications,motioncontrolsystemsrequiringeitherveryhighforceorwidebandwidthareoftenaddressedmoreefficientlywithelectro-hydraulicratherthanelectromagneticmeans.Ingeneral,applicationswithbandwidthsofgreaterthanabout20Hzorcontrolpowergreaterthanabout15kW,mayberegardedassuitableforservo-hydraulictechniques.Apartfromtheabilitytodeliverhigherforcesatfastspeeds,servo-hydraulicsystemsofferseveralotherbenefitsovertheirelectricalcounterparts.Forexample,hydraulicsystemsaremechanically“stiffer”,resultinginhighermachineframeresonantfrequenciesforagivenpowerlevel,higherloopgainandimproveddynamicperformance.Theyalsohavetheimportantbenefitofbeingself-cooledsincethedrivingfluideffectivelyactsasacoolingmediumcarryingheatawayfromtheactuatorandflowcontrolcomponents.Unfortunatelyhydraulicsystemsalsoexhibitseveralinherentnon-lineareffectswhichcancomplicatethecontrolproblem.Thevastmajorityofelectronicclosedloopcontrollersarebasedonsimpleanaloguecircuitdesignsofferingrobust,lowcostimplementationsofthewellknownPIDcontrolstrategy.Thisapproachworkswellinsystemswithsimpletopologyandlimitedbandwidth.Howeverthegrowinguseofcomplexcontrolstrategies,coupledwiththeneedtosupportenhancedfeaturessuchasdata-logginganddigitalcommunications,hasledtoincreasedinterestintheuseofdigitalprocessorsforcontrolofhydraulicservo-systems.Nowhereisthismoreapparentthaninthefieldofmechanicaltestequipment,wheretheuseofaprogrammabledigitalprocessorallowsthesameservocontrollertobeusedwithawiderangeofhydraulicsystems.Thisapplicationreportreviewssomeoftheissuesfacingthehydrauliccontrolengineeranddiscussesthesuitabilityofhigh-speedDSPsforcontrolofservo-hydraulicsystems.TheapplicationreportbeginswithanevaluationoftheDSPforuseinelectro-hydraulicservo-controllers,andintroducestheTMS320C28xfamily:aDSPplatformoptimizedfordigitalcontrolapplications.Section3describestheprincipalcomponentsofthehydraulicsystem.InSection4,mathematicalmodelsforthevariousplantelementsaredevelopedandusingSimulink.Section5presentsacasestudyofahydrauliccontrolsystemanddealswithfittingrealdatatothemodeltovalidateitsbehavior.Theapplicationreportconcludeswithabriefsummaryanddiscussionoftheapplicationanddesignprocess.2TheC2000DSPforDigitalControl2.1TheBenefitsofDSPforDigitalControlEmbeddeddigitalcontrollersofferseveralimportantbenefitstotheelectronicdesignengineer,including:sTheperformanceofahighqualityhydraulicactuatorisverydependantontheservo-controller.DSPslendthemselveswelltoimplementingreal-timecontrolalgorithms,andhavebeenwidelyusedinhigh-performancedigitalcontrollersformanyyears.Inadditiontothebenefitsabove,aDSPallowstheengineerto:dcontrolstrategies,includingmulti-variableandcomplexcontrolalgorithmsusingmodernintelligentmethodssuchasneuralnetworksandfuzzylogic.performadaptivecontrol,inwhichthealgorithmdynamicallyadaptsitselftomatchvariationsinsystembehavior.implementcomplextopologiessuchasmulti-axiscontrolwheresynchronizationofmultipleforcepatternsisrequired.performdiagnosticmonitoring,includingfrequencyspectrumanalysistoidentifymechanicalvibrationsandpredictfailuremodes.efficientlyimplementhigh-orderdigitalfiltersincludingsharpcut-offnotchfilterstoremoveenergythatwouldotherwiseexciteresonantmodesandpossiblyleadtoinstability.dperipheralsettominimizecomponentcountandboardsize.Theuseofdigitalcontrollersissometimesavoidedontheexpectationthattheuserisobligedtoinvesttimeinlearningnewprogramminglanguages,andwillfacedifficultiesintestingandde-buggingthecode.TheTexasInstrumentsC28xDSPplatformincludesahighperformanceCcompilerandanextensivesetofsoftwarelibrariestominimizedevelopmenteffort.Recentdevelopmentsinsimulationsoftwarealsoenabledesignerstomodelfixed-pointdigitalprocessors,andtoautomaticallygenerateoptimizedsourcecodewhichmaybecompiledandrunonthetargetprocessordirectlyfromthesimulationenvironment.This“hardware-in-the-loop”approachenablesthecontrolalgorithmsgeneratedbythemodeltobeexecutedonarealtargetprocessorsuchastheC28xduringsimulation,andincreasesthelevelofdesignconfidence.Theeasewithwhichcontrolalgorithmscanbecreatedandmodifiedinthismannercansavemonthsofdevelopmenttimeandleadstoearliererrordetectioncomparedwithtraditionalhandcodingmethods.2.2TheTMS320C28xDSPFamilyThechoiceofprocessortoimplementagivencontrol
溫馨提示
- 1. 本站所有資源如無特殊說明,都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請下載最新的WinRAR軟件解壓。
- 2. 本站的文檔不包含任何第三方提供的附件圖紙等,如果需要附件,請聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
- 3. 本站RAR壓縮包中若帶圖紙,網(wǎng)頁內(nèi)容里面會有圖紙預(yù)覽,若沒有圖紙預(yù)覽就沒有圖紙。
- 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
- 5. 人人文庫網(wǎng)僅提供信息存儲空間,僅對用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理,對用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯,并不能對任何下載內(nèi)容負(fù)責(zé)。
- 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容,請與我們聯(lián)系,我們立即糾正。
- 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時也不承擔(dān)用戶因使用這些下載資源對自己和他人造成任何形式的傷害或損失。
最新文檔
- 音樂童話劇的觀后感
- 2025年承壓儲水箱項(xiàng)目市場調(diào)查研究報(bào)告
- 草原讀后感350字8篇范文
- 六年級寫人作文我的美食家庭650字(12篇)
- 精衛(wèi)填海童話作文15篇范文
- 公路橋梁建設(shè)安全管理及施工措施
- 等待不是浪費(fèi)時光高中生作文500字(12篇)
- 城市基礎(chǔ)設(shè)施施工技術(shù)員的任務(wù)
- 保險(xiǎn)行業(yè)信用保險(xiǎn)與財(cái)產(chǎn)保險(xiǎn)方案
- 黃山的日出自然奇觀觀察作文(13篇)
- 多彩的非洲文化 - 人教版課件
- 2025年年中考物理綜合復(fù)習(xí)(壓軸特訓(xùn)100題55大考點(diǎn))(原卷版+解析)
- -《經(jīng)濟(jì)法學(xué)》1234形考任務(wù)答案-國開2024年秋
- TCGIA0012017石墨烯材料的術(shù)語定義及代號
- 2025年江蘇省南通市海門市海門中學(xué)高三最后一卷生物試卷含解析
- 鋼結(jié)構(gòu)與焊接作業(yè)指導(dǎo)書
- 吉林省長春市2025屆高三下學(xué)期4月三模試題 英語 含解析
- 醫(yī)院退休返聘協(xié)議書10篇
- 第五單元:含長方形和正方形的不規(guī)則或組合圖形的面積專項(xiàng)練習(xí)-2023-2024學(xué)年三年級數(shù)學(xué)下冊典型例題系列(解析版)人教版
- 掘進(jìn)工作面質(zhì)量標(biāo)準(zhǔn)化細(xì)化標(biāo)準(zhǔn)實(shí)施方案
- 殘疾人健康管理
評論
0/150
提交評論