Research of SINS monitor technique based on single axis to-and-fro rotation

In order to improve the accuracy of strapdown inertial navigation system, this paper analyze the system error cause by gyro drift with different characteristic deeply, and brought the single axis to-and-fro rotation monitor technique to modulate the inertial sensor error. In the rotation modulation scheme, the error sources which dominate the modulation effect is brought, that is the constant gyro drift, the gyro scale error and the deviation of the gyro installation error. The monitor scheme based on single axis to-and-fro is confirmed by the modulation effect towards the former three error compared with the single axis continuous rotation scheme. Computer simulation show that the scheme can modulate the inertial sensor error effectively and improve the position accuracy of SINS greatly.