船舶电力系统时钟同步及改进技术研究

Research on Clock Synchronization and Improvement Based on Ship Integrated Power System

摘要:

为了提高船舶电力系统时钟同步精度,减少由于测试时间基准不同带来的误差,提出了一种新的船舶综合平台时钟同步方案；利用PTP同步报文中时间戳的精确值于每周期利用偏差对从时钟进行修正的同时,将多周期的时钟漂移进行综合,改进同步精度；利用Matlab进行时钟误差建模,进行算法改进及硬件验证；仿真和测试结果表明,该算法能够在IEEE1588同步方案的基础上将同步精度进一步提升至60 ns左右,在不改变以太网同步策略的基础上进一步改进同步精度,具有重大的研究价值和工程实践意义。

Abstract:

For improving the accuracy of clock synchronization and reducing the offset brought about by the disunion of measure benchmark of the ship integrated power system,a method to improve the accuracy of clock synchronization is proposed. By taking advantage of the time stamp included in the packet network,offset can be used to modify the slave clock,and the accuracy of the synchronization between master and slave clock can be compensated.Modeling with Matlab,afterwards the slave clock can be modified both in algorithm and in hardware.Simulation and test results shows that this method can provide signal with the offset less than 60ns,not only the problem of measurement accuracy is resolved, and more improvement could be achieved via the ethernet,meaning more in research and projiet.