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

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Pitch-axis Maneuver of UAVs by Adaptive Control Approach

무인항공기의 적응제어 법칙을 이용한 피치 기동 연구

  • Received : 2010.08.13
  • Accepted : 2010.11.21
  • Published : 2010.12.01
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Abstract

This study addresses adaptive control of UAVs(Unmanned Aerial Vehicles) pitch-axis maneuver. The MRAC(Model Referenced Adaptive Control) approach is employed to accommodate uncertainties which are introduced by feedback linearization of pitch attitude control by elevator input. The model uncertainty is handled by adaptation laws which update model parameters while the UAV is under control by the feedback control law. Steady-state pitch attitude achieved by the stabilizing control law is derived to provide insight on the closed-loop behavior of the controlled system. The proposed idea is free of linearization, gain-scheduling procedures, so that one can design high maneuverability of UAVs for pitching motion in the presence of significant model uncertainty.

본 연구는 적응제어기법을 이용한 무인항공기이 피치 자세 기동에 대한 연구 내용을 소개한다. 모델기반적응제어(Model Reference Adaptive Control)을 이용하여 피치 자세각과 엘리베이터 입력 사이의 피드백 선형화 과정에서 발생하는 불확실성을 처리하였다. 모델 불활실성 파라미터는 피드백 제어기가 작동하는 중에 적응법칙을 이용하여 추정할 수 있도록 설계 되었다. 안정화 제어기에 의해 달성되는 최종 피치 자세각에 대한 분석을 통해 폐루프 시스템의 특성을 파악할 수 있도록 하였다. 제안된 제어 기법은 기존 제어기에서 주로 채택하고 있는 선형화나 게인 스케쥴링등의 과정이 필요하지 않아 상당한 모델 오차가 존재하는 상황에서 무인항공기의 고기동 피치 제어기 설계에 도움을 줄 것으로 생각한다.

Keywords

References

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