SINS／GPS组合导航系统时序同步技术研究

Event Time Synchtonization Technology of SINS/GPS Integrated Navigation System

一本文讨论的ＳＩＮＳ／ＧＰＳ组合导航系统时序同步技术是以ＧＰＳ接收机输出的ＩＰＰＳ秒脉冲作为组合导航系统的参考时标，定时地修正ＳＩＮＳ的基本任务时序。文中提出一种利用分频器自动调节技术对ＳＩＮＳ基本任务时序发生器的分频器进行动态修正的方法。仿真实验结果表明，当ＩＳＮＳ频标相对于ＧＰＳ接收机出现漂移或其它不稳定性情况时，该方法也能使ＳＩＮＳ的基本时序与ＧＰＳ接收机保持精确同步。

The event time synchronization technology of SINS/GPS intergrat-ed navigation system proposed in this paper is to update the SINS timing base interivally in consultation with the IPPS from GPS receiver. This paper presents a dynamic auto-matic regulation method to uo‘date the frequency divisor of SINS, and the results of simulation show that the event time of SINS can synchronize with GPS receiver precise-ly when the frequency base of SINS appears drift or other nonstationarity relatively.