天文导航高精度自适应航姿与时间同步技术

High precision adaptive attitude with time synchronization technology for astronomical theodolite

船用天文导航设备因采用数学解算平台,在前端原始数采样时需进行滤波处理,数据输出与同步脉冲信号输出存在时延,一旦同步脉冲信号被干扰,对外输出数据将失去实时性。针对此问题,本文提出一种高精度自适应航姿同步技术,通过建立自适应基准脉冲为预处理模块与导航解算模块提供容错空间,结合外部时间信息实时进行时间同步自校正,避免同步信号丢失造成的时间同步异常,实现上级系统对船用导航系统多样化同步需求下高频实时数据输出。试验结果表明,该方法可行有效,可提高航姿信息实时性与可靠性。

The astronomical theodolite uses a mathematical solution platform,which requires filtering when the front–end raw data is sampled,resulting in time delay between the data output and the synchronization pulse signal output.Once the synchronization pulse stroke signal is disturbed,the output data will lose the real-time performance.To address this problem,this paper proposes a high–precision adaptive attitude synchronization technology,which provides fault tolerance space for pre-processing and navigation solving modules by establishing an adaptive reference pulse,and carries out time synchronization anomaly caused by loss of synchronization signal,so as to realize high-frequency real-time data output the diverse synchronization needs of external combat system.The experimental results show that the method is feasible and effective,and can improve the real-time and reliability of attitude information.