A Time Delay Compensation Algorithm for Transfer Alignment in Strapdown Inertial Navigation System

To reduce the influence of time delay, and enhance the precision of transfer alignment for movable base, a compensation algorithm for information transmission time delay between master and slave strapdown inertial navigation systems (SINS) in transfer alignment is proposed. The algorithm uses the delay-time and the relevant data in solving process of the slave inertial navigation system to compensate the errors caused by time delay in information transmission, and performs transfer alignment of the movable base according to the corrected information of master inertial navigation system. Test results show that the proposed algorithm can improve the transfer alignment accuracy and reduce transfer alignment time.