重力梯度仪旋转加速度计标度因数匹配方法  

Scale factor matching method for rotating accelerometers of gravity gradiometer

作　　者：聂鲁燕[1] 刘晓东[1] 宋超[1] 林强[1] 柴来庆[1] 

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》2010年第5期533-537,共5页Journal of Chinese Inertial Technology

基　　金：国防预研重点基金项目(51309010102)

摘　　要：旋转加速度计重力梯度仪为实现微弱梯度信号的测量,要求四个加速度计之间标度因数实时匹配。针对这一要求,在电磁加速度计工作原理的基础上,提出了标度因数外部粗调和在线调整的方法,设计了调整线圈并计算了不同位置相应的结果。仿真分析和实验结果表明,利用调整线圈可以实现加速度计之间的标度因数匹配。通过加速度计内部力平衡回路和外部反馈回路可以实现加速度计之间的标度因数在线实时匹配。The measurement of weak gradient-signal requires the real-time match of scale factors among four rotational accelerometers in gravity gradiometer. In view of this requirement, the external coarse adjustment and online adjustment methods for scale factors are put forward based on the working principle of electromagnetic accelerometer. The adjusting coils are designed, and the corresponding results at different positions are calculated. Simulations and test results show that the scheme of adjusting coils is an effective method for realizing the online scale factors match of accelerometers. By using the internal feedback loops of accelerometers and the external feedback loop, the on-line match of scale factors between accelerometers can be realized.

关 键 词：重力梯度仪 旋转加速度计 惯性导航系统 标度因数匹配 旋转调制 

分 类 号：U666.1[交通运输工程—船舶及航道工程]