加速度计寻北系统调平补偿技术分析

A Novel Level Compensation Technology of North-Seeking System Using Accelerometer

为了提高寻北系统的测量精度,在研究基于Corio lis效应的加速度计寻北原理的基础上,详细分析了转台调平误差及其噪声干扰对系统测量精度的影响,提出了将两个加速度计按照严格的位置规定安装在高速旋转的转台上,一个用于感应测量地球自转的北向分量,另一个用于转台的解析调平及测量由调平引起的噪声干扰.通过设计,可以降低系统对调平误差的要求,有效地改善系统的信噪比及系统偏差.

The paper studies the principle of Coriolis-effect-based dynamic north-seeking system and the influence of leveling error and noise to the measuring accuracy of north finders. A novel level compensation method is proposed, Two accelerometers are rigidly mounted on a high-speed rotating table. One is used to measure the North component of earth rotation, and the other is used to adjust the horizontal error of the table and measure the noise caused by the horizontal error. By the design, the signalto-noise ratio of the system is effectively improved, and the systematic deviation is decreased greatly at the same time.