基于CAN总线的数模混合电液控制器的研究  

Research on Electrohydraulic Controller Constituted by Digital-anolog hybrid Circuit Based on CAN Bus

作　　者：魏列江[1] 冀宏[1] 李少年[1] 江国辉[1] 

机构地区：[1]兰州理工大学流体动力与控制学院,兰州730050

出　　处：《机床与液压》2008年第10期18-20,23,共4页Machine Tool & Hydraulics

基　　金：国家自然科学基金项目(50605030);甘肃省自然科学基金资助项目(X06200401)

摘　　要：提出了基于CAN总线的数模混合电液控制器的设计思想,其特点是电液控制器内部控制算法部分由包括X9241数字电位器的数模混合电路实现,保证了控制器的响应速度;而PID参数由上位计算机通过CAN总线通信的方式下传到控制器内的AT89C51单片机,再由单片机通过I2C总线通信方式修改X9241数字电位器的值从而实现了PID参数的整定,保证了参数调整的灵活性和在线整定功能。初步实验表明控制器的阶跃响应的上升时间为0.7ms。The design idea of an electrohydraulic controller constituted by digital-anolog hybrid circuit based on CAN （ Controller Area Network） was put forward. The PID arithmetic was carried out by digital-anolog hybrid circuit including X9241 digital potentiometer, so its response time can be reduced. The parameters of PID controller were transferred to AT89C51 MCU by CAN bus and the parameters turning was performed by AT89C51 MCU through I^2C bus, which insures the parameters turning to be flexible and on line. The elementary result of experiment indicates that the step response rise time of the controller is about 0. 7ms.

关 键 词：电液控制器 数模混合电路 X9241数字电位器 PID控制器 CAN总线 

分 类 号：TG156[金属学及工艺—热处理]