解析式动态找北仪  

Analytic dynamic north finder

作　　者：顾启泰[1] 李本亮[1] 刘学斌[1] 孙国富[1] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084

出　　处：《清华大学学报（自然科学版）》2000年第8期32-35,共4页Journal of Tsinghua University(Science and Technology)

摘　　要：为满足车辆高精度、快速定向的要求 ,研究了一种新颖的解析式动态找北仪。将两只加速度计安装在高速旋转的转台上。其中一只利用哥氏效应测量地球速率的水平分量 ;另一只利用重力加速度敏感基座的倾斜运动 ,进行多位置高速采样和多周期信息处理 ,有效地抑制加速度计的测量噪声和减小基座扰动的影响 ,并通过参数最优化估计和平滑方法 ,实现解析动态找北。该系统由精密转台、恒速电路、信号处理器、微机及其测控软件组成 ,具有快速反应、高精度。This paper develops a novel analytical dynamic north finder for high accuracy, rapid determination of the azimuth for land vehicle. The method uses two accelerometers rigidly mounted on a high speed rotating table. One measures the horizontal component of the earth rate according to the Coriolis effect while the other senses the base tilt motion with respect to the gravitational acceleration. Multi position rapid sampling and multi period information processing techniques are used to effectively attenuate the measuring noise of the accelerometers and to decrease the influence of base disturbances. An optimal estimation and smoothing parameter approach is used to complete the analytical dynamic north finding process. The system has a precision rotating table, constant speed control circuit, signal processor, microcomputer and measuring and controlling software. The analytical dynamic north finder is especially suitable for military applications because of its fast response, high accuracy, low cost and capability of withstanding base disturbances.

关 键 词：找北仪 哥式效应 解析调平 虚拟平面 

分 类 号：TH752.2[机械工程—仪器科学与技术]