毕业设计（论文）-电动汽车电子差速系统自适应控制设计.doc

摘要
根据辽宁省科技厅项目《基于自适应控制的燃料电池汽车驱动系统》,提出了〈〈电动汽车电子差速系统自适应控制〉〉的子课题,技术性能要求系统控制灵活、反映快、同步性能不低于机械差速系统。
电动汽车电子差速系统中的左轮定义为基准轮,右轮定义为差动轮,控制基准轮转速是为了控制电动汽车的运行速度,控制差动轮转速是为了减小电动汽车转向时汽车车轮的滑动摩擦,尽量使电动汽车车轮运行在纯滚动状态。为了更好的实现这一控制,本设计根据自适应控制原理,构造了自适应速度控制系统。
本文包括常规差速系统设计、自适应系统控制设计和MATLAB系统仿真三部分。主电路以晶闸管斩波器和集成触发器为核心;控制电路以自适应速度控制器为核心。控制电路和主电路是通过驱动电路连接在一起的,驱动电路由EXB840专用集成芯片和一些外围器件组成。求取了自适应控制律,并采用MATLAB进行了性能仿真。仿真结果表明,本系统设计思路清晰,控制方法有效,为今后进一步开发电动汽车电子差速系统提供了依据。
关键词:电动汽车自适应电子差速系统双闭环负反馈
Abstract
Acording to the science burea of liaoningprovince that proposes the project namel<<The driven syetem of Fuel battery vehichle based on adaptive controll>>.Here ,I will introduce a sub-subject named<<Adaptive control of electric vehichle differential system>>.The performance of technology requives flexisly ,fast response and better synchnorous ability than mechanical differental system.
In this system,we define the left wheel as the norm wheal,the right is the differential wheel,controlling the benchmark wheel is to controll the speed,another one is to reduce the friction between the wheel and the ground when turning as to make the wheel purely order to better redise this controll,Istructed adaptive speed controll syetem based on adaptive controll principle.
This paper contains traditional differential speed system design,adaptive control principle and MATLAB system main circuit is based on Thyristor chopper and integrated trigger;and controll circuit‵s core is adsptive speed controller .Both the circuits is linked by driven circuit which consists of integrated chip EXB840 and some periphery gaining adsptive controll law and researching the performance with MATLAB. The result shows the design and control way is valid,and provide a conference for further study about the electric vehichle differential speed system..
Keword: electric vehichle adaptive electronic
differential double-close-loop negative feedback
目录
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