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Multibody Dynamic Model and Deployment Analysis of Mesh Antennas

메쉬 안테나의 전개 구조물 설계 및 다물체 동역학 해석

  • 노진호 (항공우주 및 기계공학부, 한국항공대학교) ;
  • 정화영 (C4ISTAR 기계융합연구소, LIG넥스원) ;
  • 강덕수 (C4ISTAR 기계융합연구소, LIG넥스원) ;
  • 강정민 (C4ISTAR 기계융합연구소, LIG넥스원) ;
  • 윤지현 (C4ISTAR 기계융합연구소, LIG넥스원)
  • Received : 2022.04.20
  • Accepted : 2022.05.24
  • Published : 2022.06.30

Abstract

The purpose of this paper was to understand the dynamics of deployment of large mesh antennas, and to provide a numerical method for determining the dynamic stiffness and the driving forces for the design. The deployment structure was numerically modeled using the frame elements. The eigenvalue analysis was demonstrated, with respect to the folded and unfolded configurations of the antenna. A multibody dynamic model was formulated with Kane's equation, and simulated using the pseudo upper triangular decomposition (PUTD) method for resolving the constrained problem. Based on the multibody model, the kinetics of the deployment, the motor driving forces, and the feasibility of the designed deployment structure were investigated.

본 논문에서는 전개형 메쉬 안테나의 동적 강성 설계 및 다물체 동역학을 이용한 요구되는 구동력 및 전개 특성을 분석하고자 한다. 프레임(frame) 요소를 이용하여 전개 구조물을 모델링한다. 다각(polygon) 형상 전개 구조물의 전개/수납된 형상에 따른 고유치 문제를 분석하였다. Kane's 방정식을 이용하여 전개 구조물의 다물체 동역학 방정식을 유도하고 PUTD (pseudo upper triangular decomposition) 방법을 적용하여 구속조건 문제를 해결하였다. 고유진동 해석 및 다물체 동역학 시뮬레이션을 통해 설계된 전개형 구조의 구조 동특성 및 실현성을 살펴보고자 한다.

Keywords

Acknowledgement

이 연구는 LIG NEX1 산학협력과제 지원으로 연구되었음

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