旋转MEMS加速度计航空重力梯度仪多物理场作用误差分析  

Error analysis of rotating MEMS accelerometer airborne gravity gradiometer under the action of multiple physical fields

作　　者：姜涛 胡宸源 刘金全 伍文杰 JIANG Tao;HU Chenyuan;LIU Jinquan;WU Wenjie(Center for Gravitational Experiment,School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学物理学院引力中心,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2022年第9期83-89,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61871439)。

摘　　要：在自研高精度MEMS加速度计基础上,成功研制了旋转加速度计式重力梯度仪样机,其中MEMS加速度计的自噪声为0.7×10^(-9)g Hz^(-1/2),重力梯度仪的自噪声达到40 E·Hz^(1/2),实验室静基座测量的分辨率达到10 E,在静态环境下满足了重力梯度测量的需求.为了实现航空环境下的重力梯度测量,结合高精度加速度计输出模型及重力梯度仪安装误差模型,通过精确测量模型中的各项系数,建立了重力梯度仪在载体运动、磁场及温度等航空环境多物理场作用下的测量误差模型,推动移动平台重力梯度测量实用化.Based on the self-developed high-precision micro-electromechanical-system(MEMS)accelerometer,a rotating accelerometer-type gravity gradiometer prototype was successfully developed,in which the self-noise of the MEMS accelerometer was 0.7×10^(-9)g Hz^(-1/2),the self-noise of the gravity gradiometer reached 40 E·Hz^(1/2)and the resolution of the laboratory static base measurement reached 10 E,which meets the requirements of gravity gradient measurement in static environment.In order to realize the gravity gradient measurement in the aviation environment,the high-precision accelerometer output model was combined with the gravity gradiometer installation error model,and the coefficients in the models were precisely measured to establish the gravity gradiometer measurement error model under the action of the carrier motion,magnetic field,temperature and other physical fields in the aviation environment,promoting the practical application of gravity gradient measurement on mobile platforms.

关 键 词：MEMS加速度计 重力梯度仪 温度效应 磁场效应 输出误差模型 

分 类 号：P223.6[天文地球—大地测量学与测量工程]