CAJ | 학술논문

为保证主、备钟切换时时间信号的准确性和稳定性，开展了主、备钟一致性保持方法的研究。搭建了进行主、备钟一致性保持的实验系统，阐述了系统的原理，分析了不同钟差预测模型的效果，给出了计算备份钟频率补偿量的公式，测试了系统在不同控制周期下的同步水平。测试结果表明：采用本系统的主、备钟一致性保持方法，能够实现主、备钟间的最大时间偏差小于1 ns的指标，同时提高了备份钟的长期频率稳定度。
위보증주、비종절환시시간신호적준학성화은정성，개전료주、비종일치성보지방법적연구。탑건료진행주、비종일치성보지적실험계통，천술료계통적원리，분석료불동종차예측모형적효과，급출료계산비빈종빈솔보상량적공식，측시료계통재불동공제주기하적동보수평。측시결과표명：채용본계통적주、비종일치성보지방법，능구실현주、비종간적최대시간편차소우1 ns적지표，동시제고료비빈종적장기빈솔은정도。
In order to ensure the accuracy and stability of time signal in switching the primary and backup clock, we studied the methods of maintaining consistency between the primary and backup clock and built an experiment system to maintain the consistency between the primary and backup clock. In this paper, the principle of the system is demonstrated, the results of different clock offset prediction models are analyzed, and the formula of frequency compensation for backup clock is given. The levels of synchronization for different control cycles are tested and the tests show that by using the method described here the time difference between the primary and backup clock is less than 1 ns as well as the long-term frequency stability of the output signal of the backup clock can be improved.