无主钟的自适应时频实时综合系统研究  

Research on Adaptive Time-Frequency Real-Time Synthesis System Without Master-Clock

作　　者：姜雪 林平卫[2,3] 茹宁 马彦宁 郭仁春 屈继峰 JIANG Xue;LIN Pingwei;RU Ning;MA Yanning;GUO Renchun;QU Jifeng(School of Information Engineering,Shenyang University of Chemical Technology,Shenyang Liaoning 110142,China;Frontier Metrology Science Center,National Institute of Metrology,Beijing 100029,China;Innovation Center for Advanced Traceability Technology,Beijing 102299,China)

机构地区：[1]沈阳化工大学信息工程学院,辽宁沈阳110142 [2]中国计量科学研究院前沿计量科学中心,北京100029 [3]先进溯源技术创新中心,北京102299

出　　处：《海军航空大学学报》2024年第5期615-621,共7页Journal of Naval Aviation University

基　　金：国家重点研发计划(2021YFF0603701)。

摘　　要：海上卫星导航系统对于保障海上安全、提高航行效率、促进海洋经济发展以及提升国家海洋战略地位具有重要意义。海上卫星导航对高精度时间频率信号的需求非常高。基于氢钟和铯钟,研制了1套用于独立守时的时频综合系统。通过搭建实验系统,对原子时算法进行了检验。系统由本地综合装置与相位微跃计组成,改变了传统硬件结构,使用微跃计内高稳晶振作为参考源,可靠性得到了提高;系统实时观测并动态赋权重,无需人为干预信号频率,实现了自动化独立守时。采用自适应加权平均算法,使综合原子时兼顾钟组信号的频率稳定度和频率准确度,从而获得稳定可靠的高精度时间基准。实验结果表明:系统输出信号的秒稳定度达到4.41×10^(-13),天稳定度为4.33×10^(-16),自适应时频综合系统的可行性和可靠性得到了有效验证。The maritime satellite navigation system is of great significance for ensuring maritime safety,improving navigation efficiency,promoting marine economic development,enhancing the status of national marine strategy.The demand for high-precision time-frequency signals in maritime satellite navigation is very high.A time-frequency synthesis system for independent timekeeping based on hydrogen and cesium clocks is developed.The verification of atomic time algorithm is conducted by building an experimental system.The system consists of a local integrated device and a Phase Micro-stepper.By changing the traditional hardware structure and using a highly stable crystal oscillator inside the Phase Micro-stepper as a reference source,the reliability has been improved;the system observes in real-time and dynamically assigns weights,which achieving automated operation without human intervention.By adopting the adaptive weighted average algorithm,the comprehensive atomic time takes into account the frequency stability and accuracy of the clock group signal,thereby obtaining a stable and reliable high-precision time reference.The experimental results show that the second frequency stability of the system output signal reaches 4.41×10^(-13),and the day frequency stability is 4.33×10^(-16).The feasibility and reliability of the adaptive time-frequency synthesis system have been effectively verified.

关 键 词：系统守时 综合原子时 自适应加权平均算法 频率稳定度 无主钟 

分 类 号：TB939[一般工业技术—计量学]