CHEN Jing-xuan, CHENG Xu-hong, LI Jin. Rapid alignment algorithm for rotary INS in inertial frame[J]. 2017, 36(7): 142-145. DOI: 10.13873/j.1000-9787(2017)07-0142-04.
基于惯性系的旋转式惯导系统快速对准算法
摘要
针对船舶大幅角晃动和线运动等复杂干扰
导致旋转式捷联惯导系统初始对准性能下降的问题
设计了基于惯性系的旋转式捷联惯导系统快速初始对准算法。针对旋转式捷联惯导系统的误差特性
设计了基于惯性系的粗对准方案;并提出了一种改进的罗经对准算法
达到缩短对准时间和提高对准精度的目的。仿真实验证明:该方法可以实现快速初始对准
7 min航向精度达到1.35’。
Abstract
Complex interference of angular swaying and linear motion can depress the alignment performance of the rotary strapdown inertial navigation system( SINS). In order to solve the problems
a rapid alignment algorithm for rotary SINS in inertial frame is presented. Based on error characteristics of rotary SINS
design a coarse alignment method in inertial frame. And an improved rotary SINS gyrocompass alignment algorithm is proposed to speed up the alignment and increase precision. Simulation results show that the proposed algorithm can accomplish Rotatry SINS alignment quickly
and make azimuth accuracy confine to 1. 35 minute of arc in 7 min.