| 星载CAN总线电接口特性研究 |
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| 引用本文： | 李新贝,高山,谭超,邵根忠.星载CAN总线电接口特性研究[J].航天器工程,2012,21(1):59-63. |
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| 作者姓名： | 李新贝 高山 谭超 邵根忠 |
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| 作者单位： | 山东航天电子技术研究所,山东烟台,264003 |
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| 摘 要： | 为了保证星载控制器局域网（Controller Area Network,CAN）总线通信的可靠性,基于叠加定理对总线接口建立了等效电路模型,结合节点电压法,计算了接收器输入端差分信号的电压,运用仿真软件绘制出了终端匹配电阻RT=124Ω条件下,电压与传输线电阻RW之间的关系曲线,确定了RW的选取范围;当RW=23Ω时,对电压与RT之间的关系曲线进行了仿真,确定了RT的选取范围;通过计算得出了RW=0Ω、RT=124Ω条件下发送器所能驱动的最多接收器节点数。模型的建立与仿真为CAN总线通信电路设计提供了一种新的模拟和验证方法。
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| 关 键 词： | 卫星 CAN总线 接口电路 |
Study on Electrical Characteristics of CAN Bus Interface in Spacecraft |
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| LI Xinbei,GAO Shan,TAN Chao,SHAO Genzhong.Study on Electrical Characteristics of CAN Bus Interface in Spacecraft[J].Spacecraft Engineering,2012,21(1):59-63. |
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| Authors: | LI Xinbei GAO Shan TAN Chao SHAO Genzhong |
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| Institution: | (Shandong Aerospace Electro-technology Institute,Yantai 264003,China) |
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| Abstract: | In order to make the controller area network（CAN） bus communication reliable,the equivalent model is set for the bus interface based on the superposition theorem,and the electric potential of the differential input signal is calculated by using the Node Voltage method;When the terminal resistor R_T is 124Ω,with the help of software,the relation curves between the signal and the twisted transmission line resistance R_W are simulated,and the R_T range is drawn.When R_W is 23Ω,the relation curves between the differential input signal and the terminal resistor R_T are simulated,and the R_T range is drawn;When R_W is 0Ω and R_T is 124Ω,the number of the most receiving terminal is obtained.The establishment and simulation of the interface model provide a good method for the CAN bus design. |
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| Keywords: | satellite CAN bus interface circuit |
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