Time Synchronization of CNC Systems Based on Switched Ethernet

被引：0
|
作者：
Yang, Haibo [1 ]
Lin, Hu [1 ]
Li, Jin [1 ]
机构：
[1] Grad Univ CAS, CAS Coll Comp & Commun Engn, Natl Engn Res Ctr High End CNC China, Shenyang Inst Comp Technol, Shenyang, Peoples R China
来源：
2010 2ND INTERNATIONAL ASIA CONFERENCE ON INFORMATICS IN CONTROL, AUTOMATION AND ROBOTICS (CAR 2010), VOL 3 | 2010年
关键词：
time synchronization; CNC systems; switched Ethernet; preemptive queues; IMPLEMENTATION;
D O I：
10.1109/CAR.2010.5456728
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In various CNC systems the MCU, servo controllers and sensors all need to be accurately synchronized for time stamping of data and motion control. This paper presents a time synchronization method for CNC systems based on switched Ethernet in which message delay variation through switches must be minimized or compensated to obtain accurate time synchronization. The method uses the switch as the time reference instead of the usual using the clock of MCU. Also it uses a low-level time-stamping scheme and blocks the time synchronization frames until the actual time is equal to the time in the payload of the frames. A preemptive mechanism is introduced to make sure the time synchronization frame can be transmitted immediately when the actual time is equal to that. Finally, experimental results are shown and discussed.
引用
收藏
页码：59 / 63
页数：5
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