捷联惯导系统改进回溯快速对准方法(英文)  

Improved fast backtracking alignment approach for strapdown inertial navigation system

作　　者：何泓洋[1] 许江宁[1] 李京书[1] 李峰[1] 查峰[1] 

机构地区：[1]海军工程大学导航工程系,湖北武汉430033

出　　处：《中国惯性技术学报》2015年第2期179-183,共5页Journal of Chinese Inertial Technology

基　　金：国家重大科学仪器开发专项(2011YQ12004502);国家自然科学基金(41404002);海军工程大学青年基金(HGDQNEQJJ13011)

摘　　要：快速性是捷联惯导系统初始对准的一项重要指标。回溯算法通过存储一段时间的陀螺仪和加速度计的数据,并反复加以利用的方式,有效缩短了对准的时间。为了进一步提高初始对准的快速性,设计了一种快速回溯对准方法(FBA)。优化对准方法被用于算法的粗对准阶段,为回溯罗经法精对准提供较为准确的初始姿态,进而提高罗经回路的收敛速度。分析了回溯算法的基本原理,设计了快速回溯对准算法的实施过程。实验结果表明,提出的算法能够降低回溯次数,大大减少对准所需的数据量,使得对准的快速性进一步提高。Rapidity is vital important for initial alignment of strapdown inertial navigation system （SINS）. Backtracking algorithm can effectively reduce the alignment time by repeatedly using the recorded measure- ments of gyros and accelerometcrs. In order to further improve the rapidity, a fast backtracking alignment approach （FBA） was designed. An optimization-based alignment approach was employed during coarse alignment stage to provide more accurate initial attitude for the fine alignment of backtracking gyrocompass, so as to improve the rapidity of the gyrocompass loop＇s convergence. The fundamental principle of backtracking algorithm was analyzed, and the implementation process of the FBA was designed. Experiment results show that the proposed algorithm can greatly reduce the execution times of backtracking and the data volume in alignment, further improving the rapidity of alignment.

关 键 词：捷联惯性导航系统 初始对准 回溯对准法 快速对准 

分 类 号：U666.1[交通运输工程—船舶及航道工程]