加速度计交叉耦合系数高精度标定

为了在1g重力场用转台标定惯性导航系统加速度计交叉耦合系数，提出基于正交多位置递推滤波算法标定加速度计的方案，通过建立正交多位置标定模型，抑制了转台误差对标定精度的影响，设计基于马尔科夫递推估计滤波算法，克服了一般最小二乘集中估计中多维矩阵求逆算法误差。仿真结果表明通过28位置标定，加速度计交叉耦合系数标定精度可达到10－7 g·g－2（ RMS）量级。

P recise Calibration for Accelerometer Cross Coupling Coefficient

For calibrating the cross coupling coefficient of inertial navigation system accelerometer in 1g gravity field by means of turntable precisely, a calibration method based on recursive filter at perpendicular multi-positions has been presen?ted in this paper. The influence of turntable error has been restrained effectively in virtue of a perpendicular multi-positions calibration model. An algorithm filter based on Markov recursive estimation is established. The multi-dimensions matrix in?verse algorithm error which is existed in least square estimation has been overcome. The simulation results show that a 10-7 g/g2( RMS) calibration precision of cross coupling coefficient can be reached by dint of twenty-eight positions calibration.