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27320095JournalofXianAerotechnicalCollegeVol127No13May2009:2009203209:(1967-),,,,,+PID(,712000):PID,,,PID,,:;PID;;+PID:TP271.32:A:100829233(2009)03200132041,,,,/,,2,,,PID(--),,,,PIDPID,,PID,,,PID,,PID:,,;PID,PID,,PID11PID33.1:VEP312DNC-50-600-PPV-AVEA250(SMC)22,,,,,,,,,3.23.2.1PID,,PIDPID,KpKIKD2,,,,PID3600NPID,PID,,,,PID,453PID4PID:KpKIKD,PID,,PID,,3.2.2641275PID6:,e,,,eecu,3.2.3PIDPID,,PID7PIDPID:PID,,,,,1.5N,,400N600N,8,,,7PIDPID8PID400N600N,:350N,100N,Z109PID,9PID,10PID,513:+PIDPIDPID,,,,10PID4,PID,,,PIDPID,[1].[M].,1995:123.[2].[M].:,1990:73275.[3].[D].,2004:40248.[:]Fuzzy+PIDControlofPneumaticProportionForceServoSystemLIZhi(DepartmentofElectromechanicalEngineering,ShaanxiEnergyInstitute,712000,Xianyang,Shaanxi,China)Abstract:TheArticlestudiesthecontrolmethodofpneumaticproportionforceservosystem.ThroughPIDcon2trolexperiment,theauthorhasabasicunderstandingofthestronglynonlinearfeaturesandcontrolfeaturesofpneumaticcontrolsystem,makesthefurtherstudyonthesystemwiththefuzzycontroltheory,andfinallyputsforwardthestrategyforfuzzyPIDcontrol.Experimentsprovethatthecontrolschemeiseffective.KeyWords:PneumaticServoControlSystem;PIDControl;FuzzyControl;Fuzzy+PIDControl(12)DesignofUSB-RS422/485InterfaceCircuitBasedonCP2102QIShu2sheng1,WANGDing2wang2(1.DepartmentofElectricEngineering,XianAeronauticalCollege,2.DirisionofAeronauticSupervision,AirForce,710077,Xian,Shaanxi,China)Abstract:CP2102isahighlyintegratedUSB-UARTbridgecircuitmanufacturedbyAmerica-basedSiliconLaboratory,whichcanrealizetheconversionfromUSB2.0toUARTandRS-485interfacewiththesimplestexternalcircuit,theleastexternalappliances,andthesmallestcircuitboard.WhileintroducingCP2102featuresandworkingprinciple,thepaperdesignsabusconversioninterfacecircuitofUSBandUARTandRS-485withCP2102asthecore.KeyWords:CP2102;RS-485;AsynchronousSerialDataBus;UniversalSerialDataBus6127