旋转加速度计重力梯度仪误差分析

安装误差和加速度计标度系数的不匹配对旋转加速度计重力梯度仪的分辨率影响很大。为此,用线性微扰方法对旋转加速度计重力梯度仪的测量方程求取变分,得到重力梯度仪的误差方程;对误差方程进行分析,得到安装误差各项对重力梯度仪输出的影响;同时,给出含有加速度计性能参数的重力梯度仪的误差方程。以澳大利亚FALCON旋转加速度计重力梯度仪为例,具体给出径向距离误差、切向误差角等大小值。

Error analysis on gravity gradiometer of rotating accelerometer

The resolution of rotating accelerometer gravity gradiometer instrument (GGI) is affected by the factors such as installation errors and scale-factor mismatch. So, the error equation of gravity gradiometer is presented in this paper by linearly perturbing the gradiometer measurement equation. By analyzing error equation, the paper obtains the results of the GGI outputs influenced by installation errors and other factors. Besides, the paper presents the error equation, including the accelerometer performance parameters. Finally, the paper takes the Australia Falcon rotating accelerometer gravity gradiometer as an example. By analyzing the error equation, the values of radial distance error, tangential direction error, etc., are presented.