基于Kalman滤波的授时测量系统研究  

Research of Timing Measure System Based on Kalman Filter

作　　者：赵宏伟[1] 廉保旺[1] 冯娟[1] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710072

出　　处：《计算机测量与控制》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)

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.

关 键 词：KALMAN滤波 北斗 校频 恒温晶振 

分 类 号：P228.4[天文地球—大地测量学与测量工程]