Macpherson형 현가장치의 새로운 모델링과 최적극배치 제어

A New Model and Optimal Pole-Placement Control for the Suspension System of Macpherson Type

  • 홍금식 (부산대학교 기계공학부) ;
  • 전동섭 (부산대학교 기계공학부) ;
  • 김철민 (대우정밀공업주식회사 기술연구소) ;
  • 유완석 (부산대학교 기계공학부)
  • 발행 : 1998.12.01

초록

In this paper a new modeling and an optimal pole-placement control for the suspension system of Macpherson type are investigated. The rotational motion of the unsprung mass is emphasized in the new modeling. The two generalized coordinates selected in the new model are the vortical displacement of sprung mass and the angular displacement of control arm. Both variables are measured from their static equilibrium points. It is shown that the conventional model is a special case of the new model since the transfer function of the new model coincides with that of the conventional one if the lower support point of the shock absorber is located at the mass center of the unsprung mass. It is also shown that the resonance frequencies of the new model agree better with experimental results. Therefore, the new model is more general in the sense that it Provides an extra degree of freedom in determining the plant model for control system design. An optimal pole-placement control which combines LQ control and pole-placement technique is applied to the new model. Simulations are provided.

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