项目名称: 动态重力测量相位滞后修正及实时处理技术研究
项目编号: No.41304023
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 天文学、地球科学
项目作者: 梁星辉
作者单位: 中国科学院测量与地球物理研究所
项目金额: 25万元
中文摘要: 高精度实时重力异常数据的获取是重力辅助惯性导航的基本问题之一,而重力仪的相位滞后则是影响其精度提高的重要因素。因此,研究动态重力测量相位滞后修正及数据实时处理的方法成为必须。其难点在于针对具体的动态重力测量系统,基于参数估计理论构造合理的实时估计算法的数学模型。本项目针对这一技术难点,基于Kalman滤波方法研究了动态重力测量数据相位滞后问题和实时处理技术。内容包括重力仪二阶运动方程系统参数辨识、基于Kalman滤波的动态重力测量实时算法数学模型的构建、动态重力测量的误差补偿技术等,并对方法进行试验验证。本项目的研究对获取高精度的实时重力异常数据具有一定的意义。
中文关键词: 动态重力测量;CHZ海洋重力仪;厄特弗斯改正;kalman滤波;阻尼
英文摘要: Real-time and high precision gravity anomaly is one of the fundamental problems for gravity aided inertial navigation. And phase lag in gravimeter has an important affection on the precision improvement. Therefore, study on phase lag correction and real-time data processing for dynamic gravimetry is necessary. To construct a reasonable mathematical model of real-time algorithm base on parameter estimation theory is an important issue for dynamic gravimetry.Focusing on such a problem, this research is aimed to study correction of phase lag and real time processing base on kalman filter.There are some issues that worth looking into in this study, including the identificaiton of two-order equations for gravimeter, the model of real time algorithm, and method to compensate the error for dynamic gravimetry. The methods that propose in the research is also to be verified by a searie of test. This research has its significance for obtaining real-time and high accuracy gravity anomaly.
英文关键词: kinematic gravimetry;CHZ gravimeter;etovos correction;kalman filter;damping