激光捷联惯组的双轴位置转台标定仿真

Calibration simulation for laser strapdown IMU with two-axis turntable

研究了利用双轴位置转台标定时,水平基准误差和北向基准误差对激光捷联惯组(LSIMU)标定精度的影响。首先建立了LSIMU标定模型和生成惯性器件信息的仿真算法,接着设计了LSIMU标定方案和数据处理方法,最后对LSIMU标定进行仿真和分析。仿真结果表明:水平基准误差为0.4′时,加速度计标定误差将达到116×10-6;当北向基准误差大于5o时,oo标定误差将oo0.0001。

Based on two-axis position turntable, the effect of horizontal error and north error on calibration accuracy of Laser strapdown inertial measurement unit （LSIMU） was studied. The calibration models of LSIMU and the algorithms of generating inertial measurement output were established. A continuous rotation calibration scenario and its data processing method were proposed. According to the LSIMU calibration simulation, the results show that the accelerometer calibration error will reach 116 ×10^-4 when horizontal error is about 0.4＇ , and the gyro calibration error will exceed 100 × 10 ^-6 when north error is more than 5°.