航海光纤陀螺捷联惯导系统快速对准技术研究

Research on Rapid Alignment for Marine FOG SINS

针对中小型水面舰船对航海惯导系统快速对准的实际需求,结合光纤陀螺的误差特性,提出一种针对航海光纤陀螺捷联惯导系统的快速对准方法。该方法充分考虑光纤陀螺启动特性对惯导系统对准精度的影响,在对准过程中保存光纤陀螺输出平稳后的数据,并利用基于正反向联合导航和滤波的方法,重复利用输出平稳后的数据,缩短对准时间,提高系统对准精度。经过实际的舰载试验验证表明,采取该方法后,所研制的航海光纤陀螺捷联惯导系统在对准时间20min条件下的导航精度相当于传统方法对准时间1h条件下的导航精度,显示了本方法的正确性和有效性,为航海光纤陀螺捷联惯导系统的进一步工程应用提供了有力支撑。

To meet the actual demand of rapid alignment of marine SINS for ship cabin,a method based on the error characteristics of FOG was proposed in order to reduce the impact of the startup characteristics of FOG on alignment,based on the forward and reverse combined navigation and filter,using the stationary data of FOG repeatedly which were saved during the alignment process.It shortened the alignment time and improved the alignment precision.The results of shipborne experiment show the feasibility and effectiveness of the proposed method,by which the navigation precision with 20 min alignment time can be the same as that by the normal method with 1 halignment time,and the engineering application of marine FOG SINS can be promoted.