Design And Implementation Of Multiple Tensor Gravity Gradiometer Simulation System

Gravity gradiometer which plays an important role in energy exploration,aviation and terrain recovery is one of the advanced means to explore the earth.The multiple tensor gravity gradiometer simulation system is studied in this paper.The main contents and achievements of this paper are as follows:The principle of gravity gradient measurement which including the derivation of the gradient and the derivation of the acceleration value at any point in the earth coordinate system was analyzed.The model of acceleration and gradient in the multiple tensor gravity gradiometer simulation system was established and the signal output error caused by the inconsistency of accelerometer scale factors was analyzed.A multi-component gravity gradient gradiometer system is designed,including simulating the accelerometer data on two GGI.Labview is used to design data sending and receiving interfaces which processes acceleration data.The incremental PID algorithm is used to adjust the scale factor and the communication between the two computers is serial communication.In the process of gradient simulation measurement,the magnification and phase difference of the system are analyzed.Spectrum analysis is used to calculate accelerometer scale factor consistency and the gradient average error.The design of multiple tensor gravity gradiometer simulation system is completed.On the basis of the system,the measuring error of gradient is controlled within 1E,and the consistency of scale factor reaches 10^-4,which provides a reference for the development of gravity gradient.