摘要
高精度授时设备大都是由昂贵的硬件设备组成,并采用GPS时间基准,这在成本上和安全性上限制了授时设备的应用;为解决这一矛盾,以我国自主的北斗系统时间作为基准,采用软件实现了一种高精度校频算法,利用该算法对可驯恒温晶振进行连续校频,可得到高稳定高精确的时间信号;实验结果表明:在稳定状态下,系统输出时间的频率稳定度达到10-12量级,能够满足高精度的授时需求。
Most of high--precision timing devices included expensive hardware and used GPS time benchmarks, which restricted the application of timing devices on the aspect of cost and safety. This paper implemented a high--precision proofreading frequency algorithm which can get a high--stability and high--precision time signal by continuously proofreading frequency to the adjustable osciIlator using of the time of Chinese own ＂Beidou＂ system as a benchmark time. The results of test show that the system output the frequency stability of time to 10^-12 magnitude on the state of stability and meet the demand of high--precision timing.
出处
《计算机测量与控制》
CSCD
北大核心
2009年第8期1517-1519,共3页
Computer Measurement &Control
基金
西北工业大学科技创新基金(2007KJ01028)
关键词
KALMAN滤波
北斗
校频
恒温晶振
Kalman Filter
＂Beidou＂ timing
proofreading frequency
OCXO
