Influence of single-axial rotation on INS error characteristics

The auto-compensation principle of the single-axial rotation inertial navigation system(INS) was introduced. The effect of the gyro's and accelerometer's bias,fixing error and scale-factor error on the single-axial rotation was indicated. The effect of the rotating velocity on the system errors was analyzed by simulation. The selection of the rotating mode and velocity need considering the gyro's bias and the scale-factor error. The single-axial rotation experiment was implemented by the IMU at lab,and the position error of the system is less than 1 nm/24h. The study results offer the academic basis for optimizing and designing of single-axial rotation INS.