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

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Guidance Filter Design Based on Strapdown Seeker and MEMS Sensors

스트랩다운 탐색기 및 MEMS 센서를 이용한 유도필터 설계

  • 윤중섭 (인하대학교 항공우주공학과) ;
  • 유창경 (인하대학교 항공우주공학과) ;
  • 송택렬 (한양대학교 전자컴퓨터공학부)
  • Published : 2009.10.01
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Abstract

Precision guidance filter design for a tactical missile with a strapdown seeker aided by low-cost strapdown sensors has been addressed in this paper. The low-cost strapdown sensors consist of an IMU with 3-axis accelerometers and gyroscopes, 3-axis magnetometers, and a barometer. Missile's position, velocity, attitude, and bias error of the barometer are considered as state variables. Since the state and measurement equations are highly nonlinear, we adopt UKF(Unscented Kalman Filter). The proposed guidance filter has a function of a navigation filter if target position error is not considered. In the case that the target position error is introduced, the proposed filter can effectively estimate the relative states of the missile to the true target. For specific engagement scenarios, we can observe that observability problems occur.

본 논문에서는 저가의 스트랩다운 센서 및 탐색기 기반의 정밀한 유도필터 설계를 다룬다. 고려된 스트랩다운 센서는 3축의 가속도계와 자이로로 구성된 IMU, 3 축 자기장계 및 압력고도계이다. 유도탄의 위치, 속도, 자세 및 압력고도계의 바이어스 오차가 유도필터의 상태변수로 고려된다. 상태방정식 및 측정방정식의 비선형성이 크기 때문에 UKF(Unscented Kalman Filter)를 도입한다. 제안된 유도필터는 표적 위치오차가 없을 경우 항법필터로 동작한다. 표적오차가 존재하는 경우에도 유도탄-표적간 상대 정보를 정확히 추정함으로서 정밀한 유도성능을 보장한다. 특수한 교전상황에서는 유도필터의 가관측성 문제가 발생함이 확인되었다.

Keywords

References

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Cited by

  1. Parameter Estimation of Dynamic System Based on UKF vol.13, pp.2, 2012, https://doi.org/10.5762/KAIS.2012.13.2.772
  2. Terminal Homing Guidance of Tactical Missiles with Strapdown Seekers Based on an Unscented Kalman Filter vol.38, pp.3, 2010, https://doi.org/10.5139/JKSAS.2010.38.3.221
  3. Look-Angle-Control Homing Loop Design with a Strapdown Seeker and Single Gyroscope vol.44, pp.4, 2016, https://doi.org/10.5139/JKSAS.2016.44.4.324
  4. Homing Loop Design for Missiles with Strapdown Seeker vol.42, pp.4, 2014, https://doi.org/10.5139/JKSAS.2014.42.4.317
  5. Study on Parasite Effect with Strapdown Seeker in Consideration of Time Delay pp.1533-3884, 2019, https://doi.org/10.2514/1.G004040