旋转加速度计重力梯度仪标定方法  

Calibration method for gravity gradiometer of rotating accelerometer

作　　者：钱学武[1] 蔡体菁[1] QIAN Xue-wu CAI Ti-jing(School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China)

机构地区：[1]东南大学仪器科学与工程学院,南京210096

出　　处：《中国惯性技术学报》2016年第4期427-430,436,共5页Journal of Chinese Inertial Technology

基　　金：国家863计划项目(2011AA060501)

摘　　要：提出一种旋转加速度计重力梯度仪标定方法,在重力梯度仪外侧空间确定的四个位置上依次放置一定质量的检测质量体,根据检测质量体在正交位置上引起的重力梯度大小相等,符号相反的关系确定出重力梯度标度系数,采用旋转重力梯度仪本体方式确定出重力梯度零位。给出了重力梯度零位和标度系数计算表达式,在重力梯度半物理仿真系统上进行了仿真试验验证,仿真结果表明,标定后重力梯度测量误差小于1E。A calibration method for rotating accelerometer gravity gradiometer instrument（GGI） is presented. The proof mass bodies are sequentially placed at four positions outside the GGI. The gravity gradient scale coefficient is determined based on the relationship at perpendicular position of gravity gradient component, i.e. the gradients caused by proof masses at orthogonal positions are the same in magnitude and opposite in sign. The gravity gradient bias is determined by the method of rotating the GGI body. The calculation expression of gravity gradient bias and scale coefficient are deduced in details. A validation test of calibration method is performed on the Hardware-in-the-loop simulation platform. Simulation results show that the measurement error of the calibrated gravity gradient is less than 1E.

关 键 词：重力梯度仪 旋转加速度计 检测质量体 梯度标定 

分 类 号：U666.1[交通运输工程—船舶及航道工程]