Journal of Astronautics ›› 2015, Vol. 36 ›› Issue (9): 1024-1029.doi: 10.3873/j.issn.1000-1328.2015.09.007

Previous Articles     Next Articles

Study on Inconsistent Frequency Bandwidth of Optical Gyroscope in SINS

ZHENG Yong jie,WANG Yong, CAO Meng dan   

  1. Beijing Institute of Control Engineering, Beijing 100190, China
  • Received:2014-10-11 Revised:2014-11-24 Online:2015-09-15 Published:2015-09-25


The inconsistent frequency bandwidth of optical gyros in a three-axis strapdown inertial navigation system (SINS)is studied. By using the transfer function of optical gyros, the relation between the frequency difference and the attitude error is derived, and a method to determine requirements for frequency bandwidth is given when choosing gyros. Moreover, a method to improve attitude determination accuracy is proposed by using linear interpolation or extrapolation compensation.Finally, by using a combination of fiber optic gyros and laser gyros for solving attitude, some experiments are carried out and the results verify that the theoretical analysis is correct.

Key words: Strapdown inertial navigation system, Optical gyroscope, Frequency bandwidth inconsistency

CLC Number: