대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)
- 제22권3호
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- Pages.603-610
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- 1998
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- 1226-4873(pISSN)
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- 2288-5226(eISSN)
DOI QR Code
능동 현가장치가 차량의 핸들링에 미치는 영향에 관한 연구
A study on the effects of active suspension upon vehicle handling
- Lee, Jung-Sup ;
- Kwon, Hyok-Jo (Dept.of Precision Mechanical Engineering, Graduate School of Chonbuk National University) ;
- Oh, Chae-Youn (Dept.of Mechanical Engineering, Chonbuk National University)
- 발행 : 1998.03.01
초록
This paper develops a 7 DOF vehicle model to study the effects of the active suspension on ride. The model is used to derive a control law for the active suspension using a full state linear optimal control technique. A wheelbase preview type active suspension is also considered in the control law derivation. The time delay between wheelbases is approximated using Pade approximation technique. The ride model is extended to a 14 DOF handling model. The 14 DOF handling model includes lateral, longitudinal, yaw and four wheel spin motions in addition to the 7 DOF ride model. A control law which is derived considering only ride related parameters is used to study the effects of the active suspension on a vehicle handling. J-turn maneuver simulation results show that the active suspension has a slower response in lateral acceleration and yaw rate, a bigger steady state lateral acceleration and an oversteer tendency. Lane changing maneuver simulation results show that the active suspension has a little bigger lateral acceleration but a much smaller roll angle and roll motion. Braking maneuver simulation results show that the active suspension has a much smaller pitch angle and pitch motion.