2011-2012 年德州仪器 (TI) C2000 及
MCU 创新设计大赛
【本科组 控制系统类】
基于TMS320F2812DSP的方向盘电机控制系统
陈思 徐梦超 王盛阳
上海交通大学电子信息与电气工程学院电气工程系
联系方式： 手机：15216716239 邮箱：chensi68@sina.com
作品视频观看地址为：http://v.youku.com/v_show/id_XMzYxMjc2MzIw.html
2012年3月1日
摘 要
基于TMS320F2812DSP的方向盘电机控制系统是一个使用DSP控制电机以实现模拟方向盘的系统。本系统意在模拟开车时方向盘的运行情况。主控芯片为TI公司C2000系列的TMS320F2812，使用普通直流电机配上光电编码器，并使方向盘与之同轴。人为地旋转方向盘，编码器把信号时时的反馈给2812自带的正交解码（QEP）模块，经处理后再通过控制PWM的占空比控制输出电压来实现电机转速和转矩的改变，从而使用户体验开车时转动方向盘的感觉。
关键词： TMS320F2812，直流电机，增量式旋转编码器，方向盘，QEP模块，PWM
Abstract: The motor-controlled steering wheel system based on
TMS320F2812DSP is a system using Digital Signal Processor to control the motor in order to achieve the simulation of a steering wheel system. Master chip is TI's C2000 series on TMS320F2812, using ordinary DC motor coupled with incremental rotary encoder and steering wheel with coaxial. When artificially rotating the steering wheel, the encoder sends signal from time to time back to the 2812 which comes with the QEP module, and then by controlling the PWM duty cycle modulate the output voltage in order to achieve changes in the motor speed and torque, allowing users to experience the feel of rotating the steering wheel.
Key words TMS320F2812, DC motor, Incremental rotary encoder, steering wheel ,QEP module, Pulse Width Modulation
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目录
1 引言........................................................................................................................................... - 1 - 2系统方案设计和分析 ................................................................................................................ - 1 -
2.1 系统方案设计 ................................................................................................................ - 1 - 2.1 理论分析 ........................................................................................................................ - 1 - 3系统各模块介绍 ........................................................................................................................ - 2 -
3.1 控制器选择与简介 ........................................................................................................ - 2 - 3.2 电机的选择及参数 ........................................................................................................ - 2 - 3.3 电机驱动方案的选择与介绍 ........................................................................................ - 3 - 3.4 角度检测模块旋转及光电编码器介绍 ........................................................................ - 3 - 3.5 方向盘参数 .................................................................................................................... - 3 - 3.6 显示模块选择 ................................................................................................................ - 3 - 3.7 电源模块 ........................................................................................................................ - 4 - 3.8 系统总体框图 ................................................................................................................ - 4 - 4硬件电路设计 ............................................................................................................................ - 5 -
4.1 主控制电路 .................................................................................................................... - 5 - 4.2 电机驱动电路 ................................................................................................................ - 5 - 4.3 角度检测模块 ................................................................................................................ - 5 - 4.4 显示电路 ........................................................................................................................ - 6 - 5软件设计 .................................................................................................................................... - 6 -
5.1程序功能描述与设计思路 ............................................................................................. - 6 - 5.2 软件主体部分流程图 .................................................................................................... - 8 - 附录1：........................................................................................................................................ - 9 - 附录2：......................................................................................................................................- 10 - 附录3：参考文献 ......................................................................................................................- 11 -
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