摘要
为了有效克服现有的光纤高精度时频传递系统中利用PC机伺服控制、授时端机无法自主工作的问题,提出了基于光纤时间传递双向对比法的终端站自主伺服方案。该方案采用单片机作为处理器,实现时间伺服数据的收集整理、算法处理、伺服控制、去野值和信号中断保持恢复等功能,并利用比例-积分-微分(PI D)算法进行有效校频,通过改变PI D目标值而改变授时偏差的收敛位置。实验的授时误差峰峰值为437ps,实验测试结果表明:该方案提高了终端站的集成度和机动性,同时可以校消系统偏差且灵活调整秒脉冲的输出时刻。
In the existing optical fiber time transfer system which mainly using PC for disciplining time, the terminal stations can＇t running independently. A design approach of disciplining time automatically in remote module of the optical fiber time transfer system based on two-way time transfer is proposed, which mainly using MCU for collecting and processing clock difference datum, disciplining time automatically, eliminating outliers, holding and recovering the signal when it is interrupted, calibrating the frequency with PID-algorithm, the convergent position of the timing deviation can be adjusted by change the parameter in PID-algorithm. The result presents that the peak-to-peak value synchronization time transfer is 437 ps. The tests shows that the integration and mobility of terminal stations have been enhanced after this approach take into service,fixed deviation of time system has also been calibrated flexibly.
作者
赵晓宇
卢麟
朱勇
吴传信
魏恒
ZHAO Xiaoyu;LU Lin;ZHU Yong;WU Chuanxin;WEI Heng(Institute of Communications Engineering,Army Engineering University of PLA,Nanjing 210007,China)
出处
《光通信技术》
北大核心
2018年第8期10-13,共4页
Optical Communication Technology
基金
国家自然科学基金(61673393
61371121)资助
关键词
光纤时间传递
自主伺服
PI
D算法
time transfer via optical fiber
disciplining time automatically
PID-algorithm
