系统工程与电子技术 ›› 2019, Vol. 41 ›› Issue (9): 2087-2091.doi: 10.3969/j.issn.1001-506X.2019.09.23

• 制导、导航与控制 • 上一篇    下一篇

旋转捷联惯导抗晃动对准方法

常振军1, 张志利1, 周召发1, 陈河2, 赵军阳1   

  1. 1. 火箭军工程大学导弹工程学院, 陕西 西安 710025; 2. 火箭军研究院系统工程研究所, 北京 100085
  • 出版日期:2019-08-27 发布日期:2019-08-20

Alignment method of rotating SINS with swinging base

CHANG Zhenjun1, ZHANG Zhili1, ZHOU Zhaofa1, CHEN He2, ZHAO Junyang1   

  1. 1. College of Missile Engineering, Rocket Force University of Engineering, Xi’an 710025, China;
    2. Institute of Systems Engineering, Rocket Force Research Institute, Beijing 100085, China
  • Online:2019-08-27 Published:2019-08-20

摘要:

为了提高传统车载捷联惯导在晃动基座下短时间内对准精度和抗干扰能力,提出一种基于惯性系多矢量粗对准与旋转调制最优估计精对准相结合的初始对准方法。阐述惯性系对准原理,对比分析惯性系双矢量和多矢量对准特点,建立最优估计精对准滤波模型,研究旋转调制误差抑制机理。通过仿真实验验证:惯性系对准能够克服基座角晃动影响,受线振动干扰影响较大,惯性系多矢量相比双矢量对准更加充分利用量测矢量信息,对准性能更好;旋转调制能够抑制水平器件误差影响,相比单位置对准能够得到更高的对准精度。

关键词: 捷联惯导系统, 初始对准, 旋转调制, 惯性系

Abstract:

In order to improve the robustness and precision of initial alignment of strapdown inertial navigation system (SINS) for land vehicles with swinging base, an initial  alignment method composed of inertial coordination multi-vector coarse alignment and optimal estimation fine alignment with rotation modulation is researched. Theory of inertial coordination alignment is stated, and difference between double-vector alignment and multi-vector alignment is analyzed. The model of optimal estimation fine alignment is established, and error suppression theory of SINS alignment with rotation modulation is researched. It is verified by simulation experiments that inertial coordination alignment can overcome  effect of swing, but is influenced by vibration. Multi-vector alignment uses more information of measured vectors and gets more precise alignment results than double-vectors alignment. Rotation modulation inhibits error of horizontal inertial devices and achieves better precision than single position alignment.

Key words: strapdown inertial navigation system (SINS), initial alignment, rotation modulation, inertial coordination