转速平稳性对速率偏频激光IMU影响研究

doi:10.3969/j.issn.1674-5558.2020.h4.018

导航与控制 ›› 2020, Vol. 19 ›› Issue (4/5): 154-160.doi: 10.3969/j.issn.1674-5558.2020.h4.018

转速平稳性对速率偏频激光IMU影响研究

徐兵华, 杨孟兴

西安航天精密机电研究所,西安 710100

收稿日期:2020-03-19 出版日期:2020-10-05 发布日期:2020-12-22
通讯作者: 杨孟兴,男,本科,研究员,研究生导师,研究方向为惯性导航设备及技术,为中国惯性技术学会、中国宇航学会资深会员,莫斯科国立鲍曼技术大学飞行控制系访问学者,是我国航天控制惯性专业资深专家之一,主持和参与了国家多个重点型号、重大专项基础预研的研究设计工作,获国家科技进步二等奖1项,省部级一等奖2项、二三等奖多项,国家航天奖和省部级有突出贡献专家称号,发表学术论文40余篇(为本文通信作者,Email:yangmx16@126.com)。
作者简介:徐兵华,男,博士研究生,高级工程师,为中国惯性技术学会会员,长期从事惯性导航设计及技术研究工作,参与多个国家重点导航武器系统的车载定位定向系统的研制工作,获得陕西省国防科技进步二等奖、陕西省宇航学会首届青年科技人才奖,发表论文20余篇,申报专利4项。

Study on the Influence of Rate Stability on the Rate-biased Laser IMU

XU Bing-hua, YANG Meng-xing

Xi'an Aerospace Precision Electromechanical Institute, Xi'an 710100

Received:2020-03-19 Online:2020-10-05 Published:2020-12-22

摘要/Abstract

摘要： 转位机构转动速率平稳性是影响速率偏频激光IMU初始对准精度的重要因素。从速率偏频激光IMU的工作原理和结构特点出发,理论分析了转位机构转动速率平稳性和初始对准航向角精度的关系,初始对准航向角误差和转位机构的转速相对误差呈三角函数关系,和转位机构的转速呈反比,转位机构的转速越大,转速不平稳导致的影响越小。提出了高精度速率偏频激光IMU的转速平稳性要求:要达到高精度的初始对准航向角,转位机构的转速相对误差需要控制在0.005以内,转速控制在18(°)/s以上。通过仿真分析和速率偏频激光IMU进行了试验验证,结果表明同等情况下,满足转速平稳性要求的速率偏频激光IMU的初始对准航向角误差带相对于不满足要求的减少了10",这对进一步提高速率偏频激光IMU的初始对准精度具有重要的理论和工程实践意义。

关键词: 速率偏频, 激光惯导, 转位机构, 转速平稳性

Abstract: The rotation rate stability of the mechanism is a critical factor that affects the initial alignment accuracy of the rate-biased laser IMU. Starting from the working principle and structural characteristics of the rate-biased laser IMU, this paper theoretically analyzes the relationship between the rotation rate stability of the mechanism and the accuracy of the initial alignment heading angle. The relationship between the initial alignment heading angle error and the rotation speed relative error of the mechanism presents a trigonometric function, which is inversely proportional to the rotation speed of the mechanism. The greater the rotation speed of the mechanism, the less impact caused by the unstable rotation speed. In order to achieve high precision initial alignment heading angle, the rotation speed relative error of the mechanism should be controlled within 0.005, and the rotation speed should be controlled above 18(°)/s. The simulation analysis and the experimental verification of the rate-biased laser IMU show that the error band of the initial alignment course angle of the rate-biased laser IMU which meets the requirements of the speed stability is reduced by 10″ compared with that which does not meet the requirements. It has important theoretical and engineering significance to improve the initial alignment accuracy of rate-biased laser IMU in the future.

Key words: rate-bias, laser inertial navigation, indexing mechanism, rate stability

中图分类号:

U666.1

徐兵华, 杨孟兴. 转速平稳性对速率偏频激光IMU影响研究[J]. 导航与控制, 2020, 19(4/5): 154-160.

XU Bing-hua, YANG Meng-xing. Study on the Influence of Rate Stability on the Rate-biased Laser IMU[J]. Navigation and Control, 2020, 19(4/5): 154-160.

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转速平稳性对速率偏频激光IMU影响研究

Study on the Influence of Rate Stability on the Rate-biased Laser IMU

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