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1、.高等教育自学考试本科毕业论文基于AT89C51单片机的步进电动机控制系统设计摘要...随着微电子和计算机技术的发展,步进电机的需求量与日俱增,它广泛用于打印机、电动玩具等消费类产品以及数控机床、工业机器人、医疗器械等机电产品中,其在各个国民经济领域都有应用。研究步进电机的控制系统,对提高控制精度和响应速度、节约能源等都具有重要意义。步进电机是一种能将电脉冲信号转换成角位移或线位移的机电元件,步进电机控制系统主要由步进控制器,功率放大器及步进电机等组成。采用单片机控制,用软件代替上述步进控制器,使得线路简单,成本低,可靠性大大增加
2、。软件编程可灵活产生不同类型步进电机励磁序列来控制各种步进电机的运行方式。本设计是采用AT89C51单片机对步进电机的控制,通过I/O口输出的时序方波作为步进电机的控制信号,信号经过芯片ULN2003驱动步进电机。实践证明,基于单片机控制的步进电机比传统的步进控制器具有更好的性能,更加简单、方便、可靠。本设计的主要研究对象就是开环伺服系统中最常用的执行器件——步进电机。关键词:步进电机,单片机,正反转控制,键盘控制,LCD液晶显示...BasedontheAT89C51single-chipsteppermotorcontrols
3、ystemdesignABSTRACTWiththedevelopmentofmicroelectronicsandcomputertechnology,thesteppermotordemandgrowwitheachpassingday,whichiswidelyusedinprinters,electrictoysandotherconsumerproducts,industrialrobotsandCNCmachinetools,medicalequipmentandothermechanicalandelectrical
4、products,thenationaleconomyinvariousfieldsareapplied.Studyofsteppingmotorcontrolsystem,toimprovethecontrolprecisionandresponsespeed,energysavingetchaveimportantsignificance.Asteppermotorcanbeconvertedintoelectricpulsesignalofangulardisplacementorlinedisplacementofthem
5、echanicalandelectricalcomponents,asteppermotorcontrolsystemismainlycomposedofasteppingcontroller,apoweramplifierandasteppermotor.Usingsinglechipmicrocomputercontrol,usingsoftwaretoreplacethesteppingcontroller,whichhastheadvantagesofsimplecircuit,lowcost,reliabilityisi
6、ncreased.Softwareprogrammingcanproducedifferenttypesofstepmotorexcitationsequencetocontrolsteppermotoroperationmode.ThisdesignistheuseofAT89C51single-chipsteppermotorcontrol,throughtheI/Oportoutputtimingsquarewaveasasteppermotorcontrolsignal,thesignalthroughtheULN2003
7、chipsteppermotordriver.Practicehasproved,basedonthesinglechipmicrocomputertocontrolthestepmotorthanthetraditionalsteppingcontrollerhasbetterperformance,moresimple,convenient,andreliable.Thedesignofthemainresearchobjectistheopenloopservosysteminthemostcommonlyusedexecu
8、tivedevice--steppingmotor.Keywords:Steppermotor,MCU,Positivecontrol,Keyboardcontrol,LCDliquidcrystaldisplay...目录中文摘要I英文摘要II1