Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

A study on the effects of active suspension upon vehicle handling

능동 현가장치가 차량의 핸들링에 미치는 영향에 관한 연구

  • 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)
  • 이중섭 (대우상용차(주) 샤시설계실) ;
  • 권혁조 (전북대학교 대학원 정밀기계공학과) ;
  • 오재윤 (전북대학교 기계공학부)
  • Published : 1998.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

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.

Keywords