A rotation accelerometer gravity gradiometer motion error after-event compensation method

Abstract

The invention discloses a rotation accelerometer gravity gradiometer motion error after-event compensation method, which comprises the following steps of recording the angular motion and the linear motion of a gravity gradiometer in the gravity gradient exploration of a movable base, and eliminating the angular motion and linear motion errors in output data of the gravity gradiometer based on a rotation accelerometer gravity gradiometer analytical model after the exploration is finished. According to the post-event motion error compensation method, under the condition that the precision of thegravity gradiometer is not changed, the requirement of the gravity gradiometer on the precision of an online error compensation system can be greatly reduced, so that the circuit and mechanical design of the rotary accelerometer gravity gradiometer is simplified, and the rotary accelerometer gravity gradiometer is simpler and is lower in cost.

Description

technical field [0001] The invention relates to a post-compensation method for the motion error of a rotary accelerometer and a gravity gradiometer, belonging to the technical field of precision measurement. Background technique [0002] Gravity gradient exploration of moving base is a low-cost, high-efficiency gravity gradient exploration method; it is currently the most advanced gravity field exploration method in the world. Gravity gradient data are widely used in geological analysis, gravity field modeling, high-precision navigation, resource exploration, etc. Gravity gradiometer has extremely important value in national defense, civilian use and scientific research. At present, the gravity gradiometers under research at home and abroad mainly include cold atom gravity gradiometers, superconducting gravity gradiometers, MEMS gravity gradiometers, etc. Gravity gradiometers that have been put into commercial application abroad mainly include rotational accelerometer grav...

AI Technical Summary

Problems solved by technology

[0003] During the gravity gradient exploration of the moving base, due to the installation error of the accelerometer inside the gravity gradiometer, the first-order and higher-order scale coefficients of the accelerometer do not match, and the circuit gain does not match, etc., the acceleration, angular velocity, and angular acceleration of the gravity gradiometer are transmitted. to the output of the gravity gradiometer, causing measurement errors

Rotational accelerometer gravity gradiometer online error compensation, its compensation circuit and mechanical design are complex, and can only suppress the gravity gradiometer linear motion and angular motion errors to a certain extent, the residual gravity gradiometer linear motion error, angular motion error, Seriously affect the measurement accuracy of the gravity gradiometer, requiring post-event error compensation

There is currently no public report on the post-event compensation method for the motion error of the rotating accelerometer and the gravity gradiometer

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