在基于惯性量匹配算法的船体姿态基准传递技术中，保证2套惯导系统的数据同步是实现高精度的必要条件。本文对基于角速度匹配的姿态基准传递进行研究，并重点针对该过程的时间同步问题提出解决方案。一方面利用GPS的1PPS信号作为基准时钟源，完成2套系统的晶振校正，建立数据同步采集机制。另外，设计引入时延的扩维Kalman滤波器，对残余时延误差进行在线补偿。依靠同步采集与算法补偿相结合，实现船体变形角的高精度解算。仿真试验得到时延干扰下的测量误差在10角秒左右，证实所提方案具有较高的应用价值。
For transfer technology of ship's attitude references based on inertial matching method, ensuring data synchronization between two sets of inertial navigation systems is a necessary condition to achieve high accuracy. In this paper, transfer technology of ship's attitude references based on angular velocity matching is studied, and we solved the time synchronization problem in this process. On the one hand, the GPS 1PPS signal is used as the reference clock source to complete the crystal oscillation correction of the two systems and establish a data synchronization acquisition mechanism. In addition, an extended Kalman filter with time delay is designed to compensate the residual time delay error online. and the high-precision calculation of ship's deformation angle is realized by combining synchronous acquisition with algorithm compensation. The simulation results show that the measurement error under time-delay interference is about 10 angular seconds, which proves that the method we proposed has high application value.
2019,41(11): 165-169 收稿日期：2019-07-26
DOI：10.3404/j.issn.1672-7649.2019.11.034
分类号：U666.1+3
作者简介：杜红松(1979-),男,工程师,从事舰船导航技术研究
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