飞行控制系统CAN总线优化方法研究  

Research on Optimization Method of CAN Bus on the Flight Control System

作　　者：郑春胜 梁婕[1] 段然[1] 

机构地区：[1]北京航天自动控制研究所,北京100854

出　　处：《航天控制》2009年第1期80-84,共5页Aerospace Control

摘　　要：控制器局域网(CAN)作为一种可有效支持分布式控制和实时控制的多主串行通信总线,因具有纠错能力强、电磁兼容性好,实时性好、以及成本低等特点,正逐渐在航空航天领域得到广泛应用。本文从对总线性能影响显著的总线位定时入手,深入分析了通信波特率、位周期的取样位置等参数对网络通信性能的影响;并采用该方法对某型号CAN总线应用进行了优化,通过实时监听记录,检测数据传输波形,捕捉错误帧等手段,结合眼图分析,解决了错误帧的问题,并给出了结论。Controller Area Network （CAN） is a multi-master serial BUS, which can effectively support distributed control and real-time control tasks. Due to its advantages of high error-correction capability, good EMC, high real-time performance, high transmission efficiency and low cost, CAN is gradually gaining the popularity in aerospace application fields. Starting from bit timing which has significant influence on bus performance, the paper thoroughly analyses the effects on the communication performance imposed by Baud rate, sample dot of bit period, etc. Based on the real-time monitor and record, data transmission waveform, frame error capturing, and combined with eye-diagram, the paper discusses the optimization method of CAN bus system and draws the conclusion.

关 键 词：CAN总线 位定时 同步 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]