Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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A Study on Error Analysis of Dual-Axis Rotational Inertial Navigation System Based on Ring Laser Gyroscope

링레이저 자이로 기반 2축 회전형 관성항법장치 오차해석에 대한 연구

  • Received : 2018.07.11
  • Accepted : 2018.10.11
  • Published : 2018.11.01
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Abstract

There is a method to enhance the pure navigation performance of INS(Inertial Navigation System) through the rotation of inertial measurement unit to compensate error sources of inertial sensors each other and that INS using this principle of operation is called rotational INS. In this paper, the exact error analysis of rotational INS based on ring laser gyro considering the coupling effect with gravity and earth rate is performed to evaluate the navigation performance by inertial sensor error sources. And error analysis and performance evaluation result confirmed by modelling and simulation is also proposed in this paper.

관성항법장치 순수항법 성능을 개선하는 방법으로 관성센서 오차가 상호 상쇄되도록 관성센서뭉치를 회전시켜 항법 성능을 개선하는 방법이 있으며 이러한 원리로 동작하는 항법장치를 회전형 관성항법장치라 한다. 관성센서 오차에 의한 회전형 관성항법장치의 정확한 항법 성능 분석을 위해서는 이에 대한 이론적 오차해석이 요구되나 기존의 많은 연구에서는 지구회전 각속도 및 중력 가속도에 의한 영향을 무시하고 오차해석을 수행하여 회전형 관성항법장치의 정확한 항법 성능 분석이 수행되지 않았다. 본 논문에서는 링레이저 자이로 기반 회전형 관성항법장치의 정확한 항법 성능 분석을 위하여 지구회전 각속도 및 중력 가속도 항을 포함한 이론적인 오차해석을 수행하고 이를 기반으로 회전형 관성항법장치의 항법 성능 분석 결과를 제시하였다.

Keywords

References

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