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1、西北t業(yè)人學(xué)碩士學(xué)位論文摘要計(jì)算機(jī)控制的材料試驗(yàn)機(jī),是目前國內(nèi)外試驗(yàn)機(jī)行業(yè)開發(fā)研究的熱點(diǎn)。本論文在掌握大量試驗(yàn)機(jī)動(dòng)態(tài)信息的基礎(chǔ)上,深入研究并設(shè)計(jì)了扭轉(zhuǎn)材料試驗(yàn)機(jī)計(jì)算機(jī)控制系統(tǒng)。對(duì)系統(tǒng)的分析表明:被控對(duì)象參數(shù)的大范圍變化、多余力、試件扭轉(zhuǎn)變形對(duì)負(fù)載流量的干擾以及摩擦力矩干擾是影響控制精度的四個(gè)主要因素。文中應(yīng)用了結(jié)構(gòu)不變性原理設(shè)計(jì)了補(bǔ)償器,以消除這些不利因素的影響。針對(duì)系統(tǒng)對(duì)象的這些特點(diǎn),分別對(duì)傳統(tǒng)PID控制和內(nèi)??刂七M(jìn)行了研究與仿真,仿真結(jié)果表明:線性PID控制不能滿足全部性能指標(biāo)的要求。而內(nèi)模控制結(jié)構(gòu)簡(jiǎn)單,具有很強(qiáng)的魯棒穩(wěn)定性,能夠?qū)崿F(xiàn)對(duì)特定輸入信號(hào)
2、的無靜差跟蹤,而且能夠完全抑制外加擾動(dòng)。其優(yōu)良的性能很適合本系統(tǒng)。在PC機(jī)平臺(tái)Windows系統(tǒng)下,以VC為開發(fā)環(huán)境,編制了試驗(yàn)機(jī)測(cè)控軟件。系統(tǒng)軟件主要具有以下特點(diǎn):采用AD0訪問Access試驗(yàn)信息數(shù)據(jù)庫。借助Crystalreport水晶報(bào)表,實(shí)現(xiàn)了報(bào)表的選擇與打印。利用多線程、多媒體定時(shí)器等技術(shù)使數(shù)據(jù)的采集精度得以提高,實(shí)時(shí)性得到保障。關(guān)鍵字:扭轉(zhuǎn)材料試驗(yàn)機(jī)結(jié)構(gòu)不變性原理內(nèi)??刂茰y(cè)控軟件實(shí)時(shí)性西北工業(yè)大學(xué)碩士學(xué)位論文AbstraetAbstractAtpresent,thematerialtest-bedofcomputer-centrelist
3、hehotspotofexploitureandresearchininternationaltest-bedindustry.Inthispaper,itresearchesanddesigncomputer-controlsystemoftorquematerialtest-beddeeply,whichisbasedonmasteringlotsoftest-beddynamicinformation.Theanalysistosystemindicatesthatthelargevariationoftheobjectparameters,re
4、dundantforce,deformationofthespecimenandthedisturbancecausedbythefrictionalmomentarefourmajorfacforsinfluencingthecontrolaccuracy.Inthepaper,itdesignscompensatortoeliminateinfaustinfluence,whichappliesprincipleofstructurefixity.Toaimatthecharacteristicofsystemobject.itgoesonrese
5、archandsimulationrespectivelytoPIDcontrolandinternalmodelcontr01.ThesimulationresultindicatesthatthelinearPIDcontrol,cannotsatisfyrequestoffullperformancetarget.Butthestructureofintemalmodelcontrolisverysimpleness,italsohasstrongrobuststability.Itcallrealize110statiedifferenceto
6、specialinputsignal.Theadditionaldisturbaisocanberestrainedcompletely.Theexcellentperformanceisverysuitableforthesystem.Thetest-bedcontrolsoftwareisweavedonVCenvironnlent,whichisexploit·uredonPCfiat-roofandWindowssystem.Thesystemsoftwarehashereinafteroh-aracteristiemostly:Intervi
7、ewingAccesstestinformationdatabasebyadoptingADO.RealizingselectionandprintingofreportbyusingCrystalreport.Thesamplingprecisionisimprovedandtherealtimequalityisensuredbyusingmultithreadingandmultimediatimertechnique.Keywords:torquematerialtest-bedstucturefixityprincipleinternalmo
8、delcontrolcontr01softwarerealtimequalityⅡ西北工業(yè)大學(xué)