Error Analysis of the Multi-Frequency Coning Motion with Dithered Ring Laser Gyro INS

Dither를 가지는 링레이저 자이로 항법시스템의 복합 주파수 원추운동 오차 해석

  • Published : 2001.08.01

Abstract

The ring laser gyro(RLG) has been used extensively in strapdown inertial navigation system(SDINS) because of the apparent of having wide dynamic range, digital output and high accuracy. The dithered RLG system has dynamic motion at sensor level, caused by the dithering motion to overcome the lock-in threshold. In this case, an attitude error is produced by not only the true coning of the vehicle motion but also the pseudo coning of the sensor motion. This paper describes the definition of the multi-frequency coning motion and its noncommutativity error to reject the pseudo coning error produced by the sensor motion such as the dithered RLG. The simulation results are presented to minimize the multi-frequency coning error.

Keywords

References

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