小型车辆制动性能检测系统研究

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1、西南交通大学硕士学位论文小型车辆制动性能检测系统研究姓名：李扬申请学位级别：硕士专业：测试计量技术及仪器指导教师：傅攀20090101AbstractThebrakingperformanceofvehicleisanimportantguaranteefordrivingsafety．Therefore，itisofgreatsignificancetotestvehiclecorrectly,rapidlyandeffectively．Virtualinstrumentinlinewiththeprinciplethat“softwa

2、reisinstrument”reducesthecostofhardwareinthesystem，shortensthedevelopmentcycleandstrengthenstheexpansioncapabilityofthesystem．ThisdesignisbasedontheLabVIEWplatform，combiningthevirtualinstrumenttechnologywiththetechnologyoftesting，constructingabrakingperformancetestingsyst

3、emwhichispowerful，withreliableperformanceandwithconvenientoperation．Thispaperfirstlyintroducesthesortsoftestingsystem，principles，resultsandtheadvantagesanddevelopmentsofvirtualinstrument．Thenthemechanicalpartofthetestingplatformiscompletedaccordingtotheprincipleofinertiab

4、raking．Thehardwareofthetestingsystemiscomposedoffrequencyconverter，electricmotor,disklightbeamencoderanddataacquisitioncard．Frequencyconvertercontrolstherotationalspeedthroughcontrollingthefrequency，anddataacquisitioncardgathersthepulsesignalsoutputofdisklightbeamencoder．

5、Thiswholehardwaresystemlaysafirmfoundationforthebrakingperformancetest．Thisdesignadoptsthreemethodstocontroltherotationofmotor，whicharePIDcontrol，fuzzylogiccontrolandPID—fuzzylogiccontrol，andthecontroleffectsaresimulated．TheresultshaveproventhatPID·fuzzylogiccontrolhasthe

6、bestresult．Thesoftwareofthistestingsystemhasfulfilledthefunctionofcommunicationofserialport，PIDcontrolalgorithm，fuzzylogiccontrolalgorithm，displayofcontroldiagram，datapreservation．Theinterfaceofthesoftwareisclearwithgoodhuman—computerinteraction．，Thispaperfinallyintroduce

7、stheoperationalstepsunderpracticaltesting，andanalyzesthecomparisonofeffectofspeedcontrolunderthecurrentsituationandthetestofbrakingperformance．Theresultshaveproventhatthissystemhasmettheexpectedfunctionalrequirementswithhighaccuraciesoftestandcontr01．Keyword：brakingperfor

8、mancetest；PID；fuzzylogic；virtualinstrument；LabVIEW西南交通大学学位论文创新性声明本人郑重声明：所呈交的学位论文，是在导师指导下独立进行研究工作