基于PID算法的汽车巡航系统研究

摘要

设计了基于freescale单片机的汽车巡航系统控制器,它能够判断设定车速和实际车速之间的差值,采用PID控制算法,对发动机节气门开度进行闭环控制。设计了CAN总线接口,方便系统与其它车载电子系统的通信和信息交换。该控制器结合适当的执行结构,就可以自动保持车辆的定速行驶,减轻了驾驶疲劳,提高了车辆的安全性。%Aimed at the security and the comfort capability request, the car crmse system t Gt：5） based on tree scale single chip was designed. The system estimate the difference of the set car speed and the actual car speed, adopt the PID arithmetic, control the valve of the accelerograph in closed loop. And the CAN bus interface was designed, make the communication with other electronic system on the car conveniently. This system can keep the car speed automatically, lighten the drive tire, and improve the security of the car.