重力仪加速度计振动整流误差改进方法  

Improvement method of vibration rectification error of gravimeter accelerometer

作　　者：齐国华[1] 崔粲 吴萌萌 聂鲁燕[1] 孟兆海[1] 张志涛 QI Guohua;CUI Can;WU Mengmeng;NIE Luyan;MENG Zhaohai;ZHANG Zhitao(Tianjin Navigation Instrument Research Institute,Tianjin 300131,China)

机构地区：[1]天津航海仪器研究所,天津300131

出　　处：《中国惯性技术学报》2025年第3期279-283,308,共6页Journal of Chinese Inertial Technology

基　　金：国家自然科学基金青年基金项目(42204146)。

摘　　要：石英挠性加速度计作为航空/海洋重力仪的重力敏感元件,在使用过程中经常会遭遇颠簸、风浪等振动条件,产生振动整流误差,影响重力仪测量精度。针对这一问题,对加速度计的振动整流误差机理进行了理论分析,并对影响加速度计输出非线性的因素进行了仿真分析,经过实验验证,通过优化磁钢性能、提高磁路结构对称性等措施,加速度计振动整流误差可以降低到改进前的1/10~1/20,重力仪系统振动整流误差由原来的1 mGal降低到0.7 mGal,显著改善了重力仪的抗振性能。The quartz flexible accelerometer,serving as the gravity sensor of the aviation/ocean gravimeter,is frequently subjected to vibration conditions such as bumps and tubulence during operating.This exposure induces vibration rectification errors,ultimately degrading the measurement accuracy of the gravimeter.To solve this problem,the mechanism of vibration rectification error of the accelerometer is theoretically analyzed.And the nonlinear factors which affect the output nonlinearity of the accelerometer are simulated and analyzed.Through the test verification,the vibration rectification error of the accelerator can be reduced to 1/10~1/20of the error before optimization by optimizing the performance of the magnetic steel and improving the symmetry of the magnetic circuit structure.The vibration rectification errors of the gravimeter has been reduced from 1mGal to 0.7 mGal,which significantly improved the seismic performance stability of the gravimeter.

关 键 词：重力仪 加速度计 振动整流误差 磁场 

分 类 号：TH824[机械工程—仪器科学与技术]