mat實驗9Simulink

1、MATLAB程序設計實驗9Simuli nk姓名:2 / 7班級:電信1105學號:140411072014613精選文檔、實驗目的1. 熟悉Simulink的操作環(huán)境。2. 掌握建立系統(tǒng)仿真模型以及進行系統(tǒng)仿真的方法。3. 掌握子系統(tǒng)模塊的建立與封裝技術。4. 掌握S函數的功能與設計方法。二、實驗內容8A f114、利用 Simulink 仿真 x(t) = Kco3+9cos3”Ncos如 J, A = 1，=2解：模型如圖所示:Gan10 / 7其中一個正弦函數發(fā)生器的參數設置如圖所示:月Blxk Pa泊m色term； sine WdgUse tha janpls-bajfld sins

2、 type l nuriBrioal prublsms dut t runuLng far large times 0* g. overflov in. absolute time) occur.ParamotersSine typeTijic basedTijie (t):Us a siiuLilation tiJieAjnplitxideBias:(racVse-c):Frequency2*piPhase (tai):Pl/2Sanplc tine:a0 IiTLeipiret vector paianet&ra 33 1-D亟 I ( QincelKelpvly仿真參數如圖所示:WWhh

3、 yrStart tina: |q 0|Stop tiAe. 1Solver ontionsType- Fied-Etep SflLver. odcS (DoPrince)Fisfrd-Etep size (fundmental janjilc time)D. 00Tsiflbinir jwnri jBsmril ft t.TTift nrirt.-i nriH示波器顯示的波形如圖所示:ask.Ok-0 Dl0.20.30.4050.G0.7o.e ojTime offset: 02、設系統(tǒng)的微分方程為x (t )= 2x(t ) + u(t )，其中,u(t )是一個幅度為1角頻率為1rad

4、/s的方波信號。建立系統(tǒng)模型并仿真。解：模型如圖所示:Gan仿真參數如圖所示:SiiiulactLon tiiueStart time 血 QStop tirw SoLvqr optionsType. Fisd-sttrFixedJ七rp JXZE (fvU：記NJirntzl Juiplc t-inc)仃 Solvet. odu5 (DoriiMvd-PTincc)I O. 001“Hkini and fanplc- tine optiun?Peri口die swlc time 匚口njtraiirt:得到的結果為：x=0.007117Unconst rained3、用S函數實現對輸入信號取

5、絕對值并且限幅輸出。r-U , U upper解：S函數文件代碼如下:function sys,x0,str,ts = sfuntmp I_test93(t,x,u,flag, upp) switch flag,case 0,sys,x0,str,ts=mdll nitializeSizes;case 3,sys=mdlOut pu ts(t,x,u,u pp);case 1,2,4,9 sys=;otherwiseerror(Unhan dled flag=endfunctionsys,x0,str,ts=mdll nitializeSizessizes = simsizes;sizes.N

6、umC on tStates = 0; sizes.NumDiscStates = 0; sizes.NumOut puts= 1;sizes.Nu minputs= 1;sizes.DirFeedthrough = 1; sizes.NumSa mp leTimes = 1; sys = simsizes(sizes);x0 =; str =; ts = 0 0; functionsys=mdlOut pu ts(t,x,u ,upp)if abs(u)abs( upp)sys=abs( upp*on es(size(u);elsesys=abs(u);end仿真模型如圖所示：,nu m2s

7、tr(flag);untnnpl_testSine WaveS-Fu nction模塊參數如圖所示:S-FunctionFunction Block Parameters: S-Function3-FuncticjnScopeUser-definable blcck. Blocks can be written in C, KATLAB (Level-IJ, and Fortran and must conform to S-fvuiction standidsAddGain?GainiDerivative仿真參數如圖所示:SijhuIartLQn tijisStop tiiue: 2Solver optionsType：Vftciible-jtep* Salver.JtoH step ElECautoRelative tolerance: le3Kin step sizea