TY  - EJOU
AU  - Sun, Jin 
AU  - Zhang, Dengyin 
AU  - Shi, Xiaoye 
AU  - Ding, Fei 

TI  - Fast Compass Alignment for Strapdown Inertial Navigation  System
T2  - Computers, Materials \& Continua

PY  - 2020
VL  - 65
IS  - 2
SN  - 1546-2226

AB  - Initial alignment is the precondition for strapdown inertial navigation system 
(SINS) to navigate. Its two important indexes are accuracy and rapidity, the accuracy of 
the initial alignment is directly related to the working accuracy of SINS, but in selfalignment, the two indexes are often contradictory. In view of the limitations of 
conventional data processing algorithms, a novel method of compass alignment based on 
stored data and repeated navigation calculation for SINS is proposed. By means of data 
storage, the same data is used in different stages of the initial alignment, which is 
beneficial to shorten the initial alignment time and improve the alignment accuracy. In 
order to verify the correctness of the compass algorithm based on stored data and 
repeated navigation calculation, the simulation experiment was done. In summary, when 
the computer performance is sufficiently high, the compass alignment method based on 
the stored data and the forward and reverse navigation calculation can effectively 
improve the alignment speed and improve the alignment accuracy.
KW  - Strapdown Inertial Navigation System (SINS)
KW  -  compass alignment
KW  -  data storage
KW  -  reverse navigation calculation
KW  -  forward navigation calculation

DO  - 10.32604/cmc.2020.011459