转台误差对MEMS陀螺标定的影响分析  

Influence Analysis of Turntable Error on the Calibration of MEMS Gyroscope

作　　者：李登 张鹏 李孟委 LI Deng;ZHANG Peng;LI Meng-wei(School of Instrument and Electronics, North University of China, Taiyuan 030051, China;Nantong Institute of Intelligent Opto-Mechatronics, North University of China, Nantong 226000, China)

机构地区：[1]中北大学仪器与电子学院,山西太原030051 [2]中北大学南通智能光机电研究院,江苏南通226000

出　　处：《中北大学学报（自然科学版）》2021年第2期165-170,186,共7页Journal of North University of China(Natural Science Edition)

摘　　要：MEMS陀螺是导航系统中的关键元器件,提高其精度对提升导航系统性能具有重要意义.基于多体系统建立三轴转台误差模型,根据转台运动机理分析得到三轴转台的各类几何误差项及运动误差项,然后阐述陀螺标定原理,推导出MEMS陀螺标定全参数误差模型,测量出转台各项误差参数值.在此基础上进行速率标定实验,分别求得加入转台误差项参数和不加转台误差项参数时得到的MEMS陀螺误差系数,对比得到两者差值,根据此误差值可以对在不考虑转台误差项参数时得到的MEMS陀螺误差系数进行校正以提高精度.实际工程应用中,可以通过建立MEMS陀螺标定全参数误差模型修正转台误差以提高MEMS陀螺精度,从而提升惯性导航系统性能.The MEMS gyroscope is a key component in the navigation system,and its improved accuracy is of great significance for improving the performance of the navigation system.In this paper,a three-axis turntable error model was established based on a multi-body system,various geometric error terms and motion error terms of the three-axis turntable were obtained according to the analysis of the movement mechanism of the turntable.On this basis,the rate calibration experiments were carried out to obtain the MEMS gyro error coefficients with and without the error parameters of the turntable,and the difference between the two was obtained.In the practical application of the project,the error of the turntable can be corrected by establishing a MEMS gyro calibration full-parameter error model to improve the accuracy of the MEMS gyro and the performance of the inertial navigation system.

关 键 词：三轴转台 误差建模 MEMS陀螺 标定精度 

分 类 号：TH11[机械工程—机械设计及理论]