Influence and compensation of the installation error on rotation SINS

There are various installation errors in the rotation inertial navigation system caused by several factors, such as the coaxial error of the shaft and the bearing, the clearance of the shaft, the precision of the machining and the installation. Here, various installation relationships are described, and the output characteristics of the system and the modulation effects of errors are deduced and analyzed in detail. On the basis of theoretical analysis, a suitable error compensation model designed for the actual rotation inertial navigation system through the analysis of main error source is presented to compensate for the corresponding errors. Results of the error compensation show that the compensation scheme can eliminate the non-orthogonal error between the gyro sensitive axis and the rotation axis, the drift with the specific force and the error of periodic fluctuation caused by rotation, which can find wide applications for engineering.