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Roll Angle Estimation of a Rolling Airframe Using a GPS and a Roll Rate Gyro

단일 GPS와 롤각속도계를 이용한 롤 회전 비행체의 롤자세각 추정

  • Received : 2014.08.06
  • Accepted : 2015.01.13
  • Published : 2015.02.01

Abstract

In this paper, a roll angle estimation method of a rolling airframe using a low grade GPS and a roll rate gyro is proposed. The strength of the received signal of the GPS antenna attached on the rolling airframe is maximized when the GPS satellite is placed on the plane determined by the x-axis of the rolling airframe and the GPS antenna axis. Under the assumption that the x-axis of the rolling airframe is coincident with its velocity vector, the roll angle of the rolling airframe is calculated from the relative position vector of the satellite to the GPS when the GPS signal strength becomes maximum. The Kalman filter combined with a roll rate gyro is introduced to increase the determination accuracy of the roll angle. The performance of the proposed method is verified via 6-DOF simulations.

본 논문에서는 단일 저가형 범용 GPS 수신기와 롤 축 각속도계를 이용하여 롤 회전 비행체의 롤 자세각을 결정하는 기법을 제안한다. 비행체에 부착된 GPS 수신기의 신호 수신강도는 GPS안테나가 향하는 방향과 비행체의 종축이 이루는 평면 내에 GPS위성이 존재할 때 최대가 된다. 비행체의 종축이 속도벡터와 일치한다고 가정하면, 비행체에 대한 GPS위성의 상대위치벡터를 이용하여 GPS 안테나 신호가 최대일 때의 롤 각을 결정할 수 있다. 롤 각 결정의 정밀도를 높이기 위해 롤 축 각속도계를 이용한 칼만필터를 구성하였다. 6-자유도 시뮬레이션을 통해 제안된 방법의 성능을 검증하였다.

Keywords

References

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