基于高度计位置修正的SINS/GNSS车载重力测量方法  

SINS/GNSS Vehicle Gravity Measurement Method Based on Altimeter Position Correction

作　　者：张志利 张克凡 赵军阳 ZHANG Zhili;ZHANG Kefan;ZHAO Junyang(Rocket Force University of Engineering,Xi’an 710025,China)

机构地区：[1]火箭军工程大学,陕西西安710025

出　　处：《火箭军工程大学学报》2025年第2期39-46,共8页Journal of Rocket Force University of Engineering

基　　金：国家自然科学基金(62305393);173基础加强领域基金(2021-JCJQ-JJ-0871)。

摘　　要：针对以车辆为动基座进行重力异常测量试验时,遇到隧道、立交桥、山谷和密林等地面障碍物遮挡导致全球导航定位系统(Global Navigation Satellite System,GNSS)天线无法正常输出定位信息,从而影响重力测量精度的问题,提出了一种基于高度计位置修正的捷联惯性导航系统(Strapdown Inertial Navigation System,SINS)/GNSS集中滤波车载重力测量方法。首先,利用高度计输出的海拔高度对GNSS信号进行自动检测和修正,解决GNSS信号跳变和空缺的问题;其次,使用修正后的GNSS信息进行组合导航和重力测量改正项计算,并利用捷联式惯性标量重力测量模型提取测线重力异常;最后,以EGM2190模型计算的测线重力异常为参考值,对低通滤波后的测线重力异常进行外符合精度评估。结果表明:与传统SINS/GNSS方法相比,所提方法具有明显的精度优势。Ground obstacles,such as tunnels,overpasses,valleys and dense forests,obstruct the GNSS(Global Navigation Satellite System)antenna from outputting positioning information.These affect the accuracy of gravity measurement when conducting gravity anomaly measurement tests using vehicles as the moving base.Thus,this study posed a dual-axis rotating SINS(Strapdown Inertial Navigation System)/global navigation satellite system centralized filtering vehicle mounted gravity measurement method based on altimeter position correction.First,the GNSS signals were detected and automatically corrected using the altitude output of the altimeter,which solved the problem of GNSS signal jump and vacancy.Second,the modified GNSS information was used to calculate the integrated navigation and gravity measurement correction term,and the gravity anomaly of the survey line was extracted using a strapdown inertial scalar gravity measurement model.Finally,adopting the gravity anomaly of the survey line calculated using the EGM2190 model as a reference value,the external coincidence accuracy of the gravity anomaly of the survey line after low-pass filtering was evaluated.The results show that compared with traditional SINS/GNSS methods,the proposed method has an obvious accuracy advantage.

关 键 词：重力异常车载测量 全球导航卫星系统 捷联惯性导航系统 高度计 

分 类 号：TJ768.2[兵器科学与技术—武器系统与运用工程]