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Ground Altitude Measurement Algorithm using Laser Altimeter and Ultrasonic Rangefinder for UAV

레이저 고도계와 초음파 거리계를 이용한 무인항공기 지면고도측정 알고리즘 설계

  • 최경식 (한서대학교 항공전자공학과) ;
  • 현정욱 (한국항공우주연구원 항공제어전자팀) ;
  • 장재원 (한국항공우주연구원 항공제어전자팀) ;
  • 안동만 (한서대학교 항공전자공학과) ;
  • 홍교영 (한서대학교 항공전자공학과)
  • Received : 2013.09.13
  • Accepted : 2013.12.30
  • Published : 2013.12.30

Abstract

This paper presents an algorithm concerning the ground altitude measurement using a laser altimeter and an ultrasonic rangefinder for UAV(Unmanned Aerial Vehicle). A simple ground test conducted using the laser altimeter and ultrasonic rangefinder that are used for conducting the low altitude measurement of UAV and identify the characteristics of each sensor. Especially, the disadvantages of the laser altimeter were checked through the ground test. After that who those are participated in this paper planned the algorithm which is complemented by the ultrasonic rangefinder and the experiment was conducted. The laser altimeter and the ultrasonic rangefinder were fused by a loosely coupled method by Kalman filter. The paper shows that stable value of altitude complemented by the ultrasonic rangefinder that covers the laser altimeter's drawbacks can be measured through the ground test.

본 논문은 레이저 고도계와 초음파 거리계를 이용한 무인항공기의 지면고도측정에 대한 알고리즘에 대하여 제시하였다. 무인항공기의 저고도 거리 측정시에 사용하는 레이저 고도계와 초음파 거리계를 이용하여 간단한 지상시험을 하였고, 각 센서들의 특징을 확인할 수 있었다. 특히, 레이저 고도계의 단점을 확인하여 초음파 거리계로 보완하는 알고리즘을 설계하였고, 실험을 진행하였다. 레이저 고도계와 초음파 거리계는 칼만필터를 이용하여 약결합 방식으로 융합하였으며, 실험결과 레이저 고도계의 단점을 초음파 거리계로 보완하여 안정적인 고도값이 측정될 수 있음을 확인하였다.

Keywords

References

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