基于can总线的电子驻车制动系统的设计与分析

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1、本文首先对线控制动技术以及电子驻车制动系统的研究背景与国内外的发展近况进行了介绍，然后概述了本项目研究中所涉及的CAN总线的相关内容，并以CAN总线网络为基础上设计了EPB系统工作原理，根据其原理对电子驻车制动系统的硬件与软件进行设计。依据具体硬件要求分析了硬件结构与组成，对主控制单元、电源监测与处理模块、H桥电机驱动部分、CAN通信模块以及外围接口等电路进行设计。再CAN通讯协议的基础上进行相关节点的软件设计，包括主控制节点与驻车制动节点的程序部分的设计。对Philips80C592和CAN总线控制器SAJ1000初始化，对后轮驻车制动微控制器的程序设计，并对报文接收与发送程

2、序及中断执行程序进行设计。关键词：线控制动，驻车制动，CAN总线，汽车电子控制，控制单元vi万方数据AbstractAtpresent,withtheincreaseofcarownershipinthecities,vehicleroadsafetygraduallybecomesthefocusofattention,anditalsohashigherrequirementsforvehiclesecurity.Althoughgeneraltraditionalautomobilebrakesystemhasbeendevelopedandimprovedforalon

3、gtime，itstillhassomeseriousshortcomings,suchaslowbrakeefficiency、slowbrakeresponse、complexcontrolactuators、poorreliabilityandsoon.Alongwithcontinuousdevelopmentandpopularizationofcomputerandelectronictechnology，especiallytheprogressofautotechnologymoreembodiedinthefieldofautomotiveelectronic

4、s,X-by-wiretechnologyapplicationinthefieldofautomotivebrakeisgraduallybecomethefuturedevelopmentdirectionofautomobilebrakesystem.Brake-by-wireuseswireinsteadofsomeorallofthebrakehydrauliclineintraditionalbrakesystem，adoptstheelectricbrakeinsteadofthepreviousmechanicalbrake,assignsthesizeofbr

5、akingforceontheaxleandwheelsappropriatelybymeansofelectroniccontrolunitbasedonMCU,andaccuratelycontroltheprocessofautomobilebrake.Comparedwiththetraditionalbrakesystem,brake-by-wiresystemcansatisfythehugeequipment,complexcontrolstrategy,andmultipleconnectionmodeofautomobilebrake.Thebasicwork

6、ingprincipleofthesystemis：firstly，avarietyofsensorcollecttheinformationofdrivingconditions、automobiletransientstateandroadcondition；secondly，theinformationareconvertedintoelectricalsignals，andanalyzedbyelectroniccontrolunit(ECU),theanalysisresultsaretransferredtothecentralcontrolunit；thirdly

7、，withthehelpofCANbus，MCUgiveaninstructiontothebrakeactuator,completethecarbrakeoperation.Asakindofbrake-by-wiresystem,theelectronicparkingbrakesystem(EPB)，throughmanualoperationelectronickey,realizetheparkingbrake.DCmotorsiscontrolledbytheelectroni