基于制动试验台的虚拟仪器与变频技术外文文献翻译、中英文翻译

附录VIRTUALINSTRUMENTANDFREQUENCYCONVERSIONTECHNOLOGY-BASEDBRAKETESTSYSTEMBrakeiswidelyusefulandveryimportantsafetyassuringequipment.TheaimofBraketestsystem，whichisbasedonvisualinstrumentandfrequencychangingtechnology，istointegrativemeasureandanalyzetheperformanceandqualityofthebrake.Thispapermainlyintroducestheprinciple，composing，functionandfeaturesofthebraketestsystem.AndfromthepointofviewoftheprincipleofVisualInstrument（VI）technology，atestsystem，basedontheVIandfrequencychangingtechnologiesandconsistoffrequencychangingdriveandcontrolsub-systemandmeasuringsub-one，isconstructed.Withthetestsystemtheperformancesandbrakingcoursecouldbeautocontrolledandmeasuredtothebrakeswhichincludesdiscanddrumones.AndthemeasuringandcontrolsoftwareisprogrammedwiththeLabVIEWpublishedbyAmericanNICorporation，USA.Thendatarealtimeacquisition，processing，displayingandrecordingwillberealized.Thetestsystemalsohasthefunctionsofvoltageadjusting，rotatingspeedcontrol，loadregulating，JCvaluesetting，temperaturemeasuring，andbrakingrouteandtimememorizingandanalyzing.Itwillbeveryimportantformeaningandexcitingboostingeffecttoadvancequalityandcapabilitiesofthebrakesandthesecurityofequipmentsandsystemwhichhaveadoptthebrakes.1OperatingprinciplesAccordingtotheprincipleofworkandpower，thechangeofkineticenergyinthemovingofobjectsequalstothefullpoweroftheforceactontheobjectinthatprocess.Theenergyobtainedbybraketobetested：Therefore，itisfeasibletousecombinedinertialflywheelstosimulaterotatinginertiaofcranehoistanditstransmissioncomponentstotesttheperformanceandqualityofthebrake.Accordingtothemomentofmomentumtheorem：Tb·t=Ji·ω（1）WhenTbisfixed，tbcanbecontrolledthroughcombinationsbetweenJiandωdifferently.Brakedrumorplate，whichwillbemeasured，andcombinedinertialflywheelsforloadingonaredriventorotatebyACfrequencyconversionmotor（orDCone，whichwillnotbedealtwithinthisarticlecarefully）.Accordingtotheprinciplesshownintheformula（1），wecansimulateactualprocessesofbrakesfittedonliftingandtransportmachineries，engineeringones，miningonesandconstructiononesbychangingthetechnicalspecificationdutyJC，theflywheel'sinertialmomentJiandmotor'srotationalspeedni.Whendetectedbrakesworkinsimulationcycleandbrakerepeated，infraredthermoscopesandtorquesensors，andothersensorswillrecordbrakingshownintheheat，brakingtorque，brakingtimeandbrakespeedparameters.2ThecompositionandstructureofthebraketestsystemThistestsystemisintendedtoachievetheperformancesofdrumanddiscbrakesandhasfollowingfunctions：（1）BrakereplacementAccordingtodifferenttypeofbrakesthecorrespondingbasewillbechosenandbrakepositioncouldbeadjustedusingelectricslidetest-bed；（2）Multi-levelloadingWecansimulatetheactualloadingonbrakesinacranewithdifferentcombinedflywheels.Thetestsystemadoptsmanualhydraulicsystemcomposedbyathree-positionfour-wayhand-operateddirectionvalve，areliefoneandtheiraccessories，anditisoperationsavingandconvenienttoreplaceflywheels.（3）Regulationtherotationalspeedn（orω）ItcanberealizedbychangingfrequencysuppliedtotheACmotor.Whenbrakingtorqueisverylarge，suchas10000Nm，itshouldbeappropriateforregulatinginitialbrakespeedupward1000r/mintominimizerotatinginertiapossibly.（4）BrakingfrequencyadjustmentBasedonactualneedsbrakingfrequencycanbeconfinedinarangeof1~4timesperminute.（5）BrakingtorquemeasurementTherearethreemethods：a）Directmeasurementviatorquesensors：Rotationalspeedandtorquesensorwillbeinstalledbetweenthedetectedbrakedrumorplateandinertialflywheelplates.Dynamicbrakingtorqueofdetectedbrakewillbedirectlymeasured，showninFig.1andFig.2.Accordingtothescopeofbrakingtorqueofdetectedbrakes，twoorthreerotationalspeedandtorquesensorsshouldbepreparedfortestingtorquetomeettheaccuracyrequirements；b）Indirectparametermeasurement：Basedontherotatinginertiaandbrakingtimewecangetbraketorqueusingmathematicalrelationshipbetweentheseparameters，asshowninFig.2.c）Indirectmeasurementbypedestal-force：Thepressuresensorsareinstalledunderthebasewheredetectedbrakearefixedtofeeltheforcesgivenbybrake，andthentoobtainbraketorque.Thesecondapproachhassmallinvestment，simplestructureandnotorquesensorswhichmeannotconsideringrelatedtroublesofchangingtorquesensors.Buttheproceduretocalculatetorqueiscomplex，andaccumulatingtotalerrorswouldbelargerandthentheresultaccuracywillbelow.Thethirdwayhastheadvantageofthereplacementofsensorsiseasierandnospecialrequirementsforsensorsinstallingprecision.Itisstillanindirectmeasurementbuttheprocedureislessthanthatinthesecondmethodandthatmeansthecumulativeerrorsrelativelyissmaller.Andvisibleshortcomingispoordynamicresponse.（6）AutomaticcontrolExcepttomanualoperationtestsystemisalsoprogrammedcontrol.（7）MonitoringBrakingfrequency，initialbrakingspeed，theaggregatebrakingnumber，moment，timeandsoonwillbeshownautomatically.（8）AutomaticallydataacquisitionandprocessingThecurvedescribingbrakingtorque，timeandspeedcouldbedrawnautomaticallybymeansofcomputersoftwarewhiledetectedbrakeismeasuredindutycycleoperation.Therefore，inresponsetothewaytotestbrakingtorquethesystemcanbedividedintothreeonesofthatwithtorquesensorsuchasFig.1and2above，thatwithouttorquesensorsuchasshowninFig.3andthatofpedestal-powermeasurementwithouttorquesensor，asshowninFig.4.ThetestsystemismainlycomposedofACfrequencyconversiontransmissionsystem，flywheelsloadingsystem，rotationalspeedandtorquesensors，basewhichtofixdrumorplatebrakes，adjustableDCpowersupply，detectedbrakesandtestandcontrolsystem.基于制动试验台的虚拟仪器与变频技术

制动器是广泛有益的和非常重要的安全保障设备。制动测试系统的目的是综合衡量和分析制动试验系统的性能和质量的刹车，组成，功能。从目视仪器理论的角度来看，基于VI和频率不断变化的技术和包括频率变化的驱动和控制子系统和测量分之一构成的。随着测试系统的性能和制动过程可自动测量，以控制和刹车，其中包括光盘和鼓的。和测量和控制软件的设计与LabVIEW的出版的美国公司-美国。然后数据实时采集，处理，显示和记录一定会实现。测试系统还具有功能的电压调整，转速控制，负荷调节，巴埃纳价值设定，温度测量，和制动路线和时间背诵和分析。这将是非常重要的意义和令人激动的推动作用，以推进素质和能力的刹车和安全的设备和系统已经采取刹车。1.工作原理根据工作原理和功率的变化动能在移动的物体等于全部力量采取行动，该部队的目标过程中取得的制动能量进行测试：因此，它是可行的使用相结合，模拟惯性飞轮转动惯量的起重机吊重机及其传动部件的性能测试和质量制动。根据动量矩定理：Tb·t=Ji·ω（1）当TB是固定的，TB是可以控制的，通过组合之间籍和ω不同，制动鼓或板，这将是衡量，并结合惯性飞轮装载的驱动旋转的交流变频电机。根据原则表现在公式（1），我们可以模拟实际过程中刹车安装在起吊和运输机械，工程的，采矿业和建筑业的是通过改变技术规范责任巴埃纳，飞轮的惯性时刻姬和电机转速镍。当工作中发现刹车和制动仿真周期重复，其他传感器将记录中显示的制动热，制动力矩，制动时间和制动的速度参数。2.刹车测试系统的组成和结构该测试系统是为了实现表演鼓和盘式制动器，并以下职能：（1）更换制动根据不同类型的刹车相应的基地将选择和刹车的位置可以调整使用电动滑试验台；（2）多层次载入中我们可以模拟实际负荷制动器在起重机不同组合飞轮。该测试系统采用手动液压系统组成，由一个三人立场四路手操作的方向