旋转加速度计全张量重力梯度仿真

Simulation of Full Tensor Gravity Gradient for Rotational Accelerometer

为了给国内重力梯度仪的实物制造夯实理论基础,该文主要研究了伞型全张量旋转加速度计重力梯度仪信号模拟的产生。通过半物理仿真实验模拟了伞型重力梯度仪的测量过程,并对全张量重力梯度仿真系统进行性能测试。测试数据为MATLAB生成的理想状态下的伞型重力梯度仪三圆盘加速度计数据,将该数据载入全张量重力梯度仿真系统中,解调得到交叉和内联重力梯度分量,经过线性运算得到测量坐标系下的全张量重力梯度值,再进行坐标系转换,得到平台坐标系下的重力梯度值。结果表明,该仿真系统测量精度达到1E(1E=1×10^(-9)s^(-2))。

In order to lay a solid theoretical foundation for the physical manufacture of gravity gradiometers at,this paper mainly studies the signal simulation generation of the umbrella-type full-tensor rotational accelerometer gravity gradiometer,simulates the measurement process of the umbrella-type gravity gradiometer through semi-physical simulation experiments,and tests the performance of the tensor gravity gradient simulation system The test data is the three-disk accelerometer data of the umbrella-type gravity gradiometer in the ideal state generated by MATLAB.The data is loaded into the full tensor gravity gradient simulation system and demodulated to obtain the cross and inline gravity gradient component,the full tensor gravity gradient value in the measurement coordinate system is obtained through the linear operation,and then the coordinate system is converted to obtain the gravity gradient value in the platform coordinate system.The results show that the measurement accuracy of the simulation system reaches 1E(1E=1×10^(-9)s^(-2)).