基于CAN总线的智能电动执行器控制系统设计

Design of Intelligent Electric Actuator Control System Based on CAN Bus

电动执行机构是控制和驱动阀门的重要装置,被广泛应用于工业自动化的各种控制过程中,能够精确地实现阀门动作控制,是自动化控制环节中一种常用驱动装置。本文在研究国内外电动执行器的设计原理和控制方式基础上,设计了一种电动执行器控制系统。该系统采用CAN总线通信方式,使其更符合当前工厂自动化工程技术网络化的趋势,主控制器采用工业级STC8A8K64S4A12芯片,测量部分采用增量式光电编码器。软件部分实现了模糊参数自适应调整、模块化专家系统故障诊断及保护等功能。经调试和运行测试,系统性能稳定、参数易配置、执行误差≤0.5%,能够满足工业现场自动化控制的需求。

The electric actuator is an important device for controlling and driving the valve.It is widely used in various control processes of industrial automation,and can accurately realize the valve action control.It is a common driving device in the automation control process.On the basis of studying the design principle and control mode of foreign electric actuator,a control system of electric actuator is designed.The system adopts CAN bus communication mode,which makes it more in line with the current trend of bus automation and networking of factory automation engineering technology.The main controller adopts industrial grade STC8 A8 K64 S4 A12 chip,and the measurement part adopts incremental photoelectric encoder.The software part realizes the functions of fuzzy parameter adaptive adjustment,modular expert system fault diagnosis and protection.After debugging and running test,the system performance is stable,the parameters are easy to configure,and the execution error is≤0.5%,which can meet the needs of industrial field automation control.