文稿教程分析tutorial1 simulink

®H83BCETutorial(DrM.R.® ®formodellingandisanextensionto thatallowsengineerstorapidlyandaccuraybuildcomputermodelsofdynamicsystems,usingblockdiagramnotation.Amodelcanproducegraphicalanimationsthatshowtheprogressofasimulationvisually,significantlyenhancingunderstandingofthesystem’sbehaviour.The“program”isablockdiagramitself. ®,andclick ®Asyousee,thereis®LibraryBrowser,whereyoucanfindmostoftheitemsyouneedsuchasgains,summationblocksandintegrals.BlockLibraryListofsub-StaticGain(theoutputofthegainblockismultipliedbya Product(multiplyordivide Product,Sum(addorsubtract ,Scope(disysitsinputwithrespecttosimulation To Constant(outputtheconstantspecifiedwiththe‘constantvalue’Step(outputa Linear(outputa SineWave(outputasine SineDynamic1sIntegrator(1/s)-Continuoustimeintegrationoftheinput Derivative(du/dt)-Numericalderivative: DerivaUser-DefinedFunction(f(u))-Generalexpressionblock.Use‘u’astheinputvariableSignalsMultiplexscalarorvector

Ports&Sub-

11ProvideanInputoranOutputportforasub-systemora OutBlockContinuouslinearGainblockrepresentsthefollowingalgebraicequation(y=k*x)ortheoutputofthesystemistheinputmultipliedbyaconstant(k):(i)y= Sumblock–permitstoaddtwoormore()d=a+b+a c(i)c=a–

bDerivativeblockcomputesthetimerateofchangeofitsinput.Theblockrepresentsthefollowingdifferentialequation: Integratorblockcomputesthetimeintegralofitsinputfromthestartingtime.Weuse(.)notationtorepresentthetimederivative,e.g..(iv’)x= x1s ConnectingYoucancommandtoconnectblocksSelectthesourceHolddownCtrlandleft-clickthedestinationblock.connectsthesourceblocktothedestinationblock.lyConnectingallowsyoutodrawlineslybetweenblocksorbetweenlinesandblocks.Positionthecursoroverthefirstblock'soutputPressandholddownthemousebutton.Dragthepointertothesecondblock'sinputReleasethemousebutton.recestheportsymbolsbyaconnectinglinewithanarrowshowingthedirectionofthesignalflow.Youcancreaineseitherfromoutputtoinput,orfrominputtooutput.DrawingaBranchAbranchlineisalhatstartsfromanexistinglineandcarriesitssignaltotheinputportofablock.Boththeexistinglineandthebranchlinerepresentthesamesignal.Usingbranchlinesenablesyoutoconneignaltomorethanoneblock.ToaddabranchPositionthepointeronthelinewhereyouwantthebranch oWhileholdingdowntheCtrlkey,pressandholddowntheleftmouseDragthepointertotheinputportofthetargetblock,thenreleasethemousebuttonandtheCtrlkey.YoucsousetherightmousebuttoninsteadofholdingdowntheleftmousebuttonandtheCtrlkey. ampleconnectstheoutputoftheProductblocktoboththeScopeblockandtheToWorkspaceblock.ModelBuildingElementsofamodel modelconsistsofthreetypesofelements:sources,thesystembeingmodelledandsinks.Thecentralelement,thesystem,istherepresentationofablockdiagramofthedynamicalsystembeingmodeled.Thesourcesaretheinputstothedynamicalsystem.Sources ludeconstants,functiongeneratorssuchassinewavesandstepfunctions,andcustomsignalsyoucreatein .SourceblocksarefoundintheSourcesblocklibrary.Theoutputofthesystemisreceivedbysinks.Examplesofsinksaregraphs,oscilloscopes,andoutputfiles.SinkblocksarefoundintheSinksblocklibrary.\\Let’ssolvethefollowingdifferentialequation.x=Startinenvironmentbyclicking“File,New,Model”,andyoushouldhaveablocktreeontheleftandablankwhiteareaontheright.ClicktheSourcesoptionunderthe ®treeanddraganddropthesinewavefunction.NowintroduceanintegratorandascopefromtheCommonlyUsedBlocks.Connectthesinewaveblockwiththeintegratorblockandwiththescopeasshownbelow.1sSine

ClicktheSimulation:Startbutton,thesimulationwillexecute,thenDouble-clickonScopeandthenAutoscaletoviewtheresultsshownbelow.Start:Openm.file(initialvals.m),whichcontainsinitialvaluesofInitialise:Openmdl.file,whichcontainsblockSimulation:ViewClickonScopewindowAdjustscale(Autoscale)WritePlotinthecommandwindowasfollowsforthebatchfermentationexample:使用。用于建模和仿真是的扩展，允许工程师使用框图表示法快运行。加载，然后单击。图标如您所见，有一个。库浏览器，您可以在其中找到您需要的大部分项目，例如增益、求常数（输出‘constantvalue’参数指定的常数）SineWave（输出正弦波）连续积分器（1/s）（du/dt）Function(f(u“u”系统增益模块表示以下代数方程(y=k*x)或者系统的输出是输入乘以常数(k)：我y=k*xx(t)Sum块–允许添加两个或多个输入d=a+b+ci)c=a–b微分块计算其输入的时间变化率。该块代表以下微分方程iv’)xdx/dt连接模块您可以命令自动连接模块按住Ctrl并左键单击目标块。将源模块连接到目标模块。