Analysis of error auto-compensation technology based on optical Gyro rotating inertial navigation system

In order to use the middle-low-precision optical gyro to replace the high-precision mechanical gyro in the long run time inertial navigation system, to reduce costs and improve system reliability, the rotating error auto-compensation techniques is used to achive these objectivesia. The principle of the rotated auto-compensation technology is analyzed. With non-skewed gyro axes and skewed gyro axes cases, the optical gyro's and acceleration's each errors on the rotated compensation system respectively and the velocity sawtooth error caused by indexing are analyzed, and the choice of indexing sequence profiles and the indexing apparatus is discussed. All major gyro and acceleration error sources except for white-noise random drift and initial alignment errors are averaged out and calibrated. The effect of the rotating auto-compensation system was analyzed by simulation, and it shows that these techniques could improve the inertial navigation system's precision significantly.