Double any-position alignment without rotatable device for SINS

摘要

The effect of gyro drift and accelerometer bias can be eliminated through Double-position alignment, which leads to a high precise initial alignment. However, the special rotatable device is indispensable to rotate SINS with respect to heading axis for the traditional double-position alignment witch is very inconvenient for many applications. A double any-position alignment without rotatable device for SINS is proposed in this paper, in which the SINS just need to be rotated from first position to any-position with respect to any axis by anyway. The experiment research is carried out, and the result indicated that the method determine the initial attitude of SINS and gyro drift precisely in relative short time.