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分析了单轴和双轴连续旋转方案对于捷联惯导系统误差特性的影响。结果表明,单轴连续旋转不仅不能调制旋转轴向上陀螺的常值漂移,反而引入大小为刻度系数误差与旋转转速乘积的等效陀螺漂移,此漂移严重制约高精度陀螺组成的捷联惯导的定位精度。双轴连续旋转可以调制旋转轴向陀螺的常值漂移以及由刻度系数误差和旋转转速耦合引入的等效陀螺漂移。但因惯性器件的刻度系数误差与载体运动耦合,会在3个轴向引起等效陀螺漂移,此漂移对系统的定位精度影响强烈。不同的仿真实验证明了理论分析。
The influence of uniaxial and biaxial continuous rotation schemes on the error characteristics of SINS is analyzed. The results show that not only the uniaxial rotation can not modulate the constant value of the gyro in the rotation axis, but also the equivalent gyro drift, which is the product of the scale factor error and the rotation speed, is introduced. This drift seriously restricts the SINS The positioning accuracy. The biaxial continuous rotation can modulate the constant-value drift of the rotating axial gyro and the equivalent gyro drift introduced by the coupling of the scale factor error and the rotational speed. However, due to the inertia device scale factor error and carrier motion coupling, will cause three-axis equivalent gyro drift, the drift of the positioning accuracy of the system a strong influence. Different simulation experiments prove the theoretical analysis.