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中文摘要：
结合现有时间同步方法及高精度POS的应用需求,提出了一种以GPS接收机输出的1PPS秒脉冲为基准,采用数字参数反馈方式,对惯性测量单元的数据采集脉冲周期进行实时修正的高精度POS时间同步方法,并给出了一种简易的POS时间同步精度测试方法。然后结合光纤陀螺POS实际系统进行了时间同步精度测试和对比实验。结果表明,所提出的时间同步方法能够克服时钟漂移并修正时间信号传输延迟,在保证工作可靠性的同时实现了在融合点上数据的高精度同步。
英文摘要：
Based on the existing time synchronization technology and high precision POS application need,this paper presents an improved POS time synchronization method and a time synchronization precision test method.In the time synchronization method,the 1PPS from GPS receiver is used as the benchmark to correct the period of IMU data acquisition through digital parameter feedback.Then performance test and comparison experiments are carried out using the fiber optic gyro POS designed by BUAA.Experiment results show that this method can reduce time drift,compensate time transfer delay and enhance the reliability and accuracy of time synchronization.
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