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

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Improvement of INS-GPS Integrated Navigation System using Wavelet Thresholding

웨이블릿 임계화 기법을 이용한 INS-GPS 결합항법 시스템의 성능향상

  • 강철우 (서울대학교 기계항공공학부 대학원) ;
  • 박찬국 (서울대학교 기계항공공학부) ;
  • 조남익 (서울대학교 전기공학부)
  • Published : 2009.08.01
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Abstract

This research have introduced wavelet signal processing technic for improving navigation signals. INS signals can be distorted with conventional pre-filtering method such as low-pass filtering by unwanted smoothing on real signals. But in this paper, wavelet thresholding method is implemented to INS signal to denoise for INS-GPS integrated system. This method reduces signal noise but not distorts the rapid varing signal. And this paper applied thresholding to INS-GPS integrated navigation system and improved navigation performance.

본 논문에서는 웨이블릿 잡음제거 기법 중 하나인 임계화 기법을 이용하여 관성센서 신호의 잡음을 제거하면서도 운동에 의한 신호변화는 상대적으로 왜곡이 적은 필터링기법을 제안하였다. 이는 기존 연구들이 웨이블릿의 장점을 충분히 활용하지 못하고 저역통과 필터와 같은 형태로 사용되기 때문에 급격히 변화하는 항체에 대하여는 부적합한 점을 개선하기 위한 것이다. 제안된 방법의 성능 확인을 위하여 INS-GPS 결합항법 시스템에 적용하였다.

Keywords

References

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Cited by

  1. Improvement of a Low Cost MEMS Inertial-GPS Integrated System Using Wavelet Denoising Techniques vol.12, pp.4, 2011, https://doi.org/10.5139/IJASS.2011.12.4.371