Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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Comparisons of Kinematical Analysis for the Universal-joint System by Using Finite Rotations and Quaternions

유한회전과 4원수를 이용한 유니버설 조인트 시스템의 기구해석 비교

  • 윤성호 (금오공과대학교 기계공학부)
  • Received : 2009.11.23
  • Accepted : 2010.02.09
  • Published : 2010.04.30
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Abstract

This paper deals with the comparison of analysis methodologies by applying both Euler angle and quaternion to observe the kinematical behavior of the universal joint system used as an automotive drive-shaft. At first, conventional approaches are applied to predict a kinematical behavior by introducing only Euler angles into the universal joint system, but turns out to be lack in consistency and reliability of the analysis. Then to overcome this deficiency in numerical analysis a different methodology is proposed by using quaternion in this system. Its corresponding advantage is discussed in terms of kinetic energy, rotational velocity and rotational displacement. The application of quaternions in the numerical experiment is shown to be a more useful and valid way of establishing the ideal analytical model of the universal joint system.

본 논문에서는 자동차의 구동계 등에 사용되는 유니버설 조인트의 기구학적 거동을 관찰하기 위하여 오일러 각과 4원수(quaternion)를 적용한 두 가지 방법을 비교하였다. 이와 관련된 종래의 연구자들은 오일러 각을 사용하여 회전체의 동적인 거동을 해석하였으나 결과의 일관성과 정확도가 부족하였다. 유니버설 조인트 시스템 해석에서도 이러한 단점을 확인하였고 이를 극복하고자 4원수를 적용하였다. 구동시 원동축 1개축 회전과 원동축과 직각방향 회전축 2개의 축이 동시에 존재하는 경우에 대하여 수치해석을 통하여 기하학적인 물리량을 산출하였다. 4원수를 채용한 방법이 세차운동을 포함하는 2개축 회전에서 유니버설 조인트 시스템을 해석하는데 있어 더욱 유용한 방법임을 보여 주었다.

Keywords

References

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