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폭이 좁은 지상 차량의 승차감 향상을 위한 서로 다른 두 개의 능동형 기울임 제어 시스템들의 결합에 관한 연구
소상균 한밭대학교 생산기반기술연구소 2001 생산기반기술연구소 논문집 Vol.1 No.1
To reduce the traffic congestion and parking problems in urban areas tall and narrow vehicles have interested as a means to increase the utilization of existing freeways and parking facilities. The stability problem for those narrow vehicles which might be caused can be reduced by tilting the body toward the inside of the turn. The Direct Tilt Control(DTC) system and the Steering Tilt Control(STC) system have been proposed as those narrow vehicles. In this paper a new control system to blend both the DTC system and the STC system is proposed. The combined control system can be more effective in feeling perceived by passenger than each system only. In other word, it uses the merits of both the DTC system and the STC system. As a control strategy for combination the switching control method is introduced and the control gains to reduce the sudden jumps in responses right after switching designed.
Liang Wu,Ahmac Ejaz,KHAN MUHAMMAD ARSHAD,윤일중 한국자동차공학회 2021 International journal of automotive technology Vol.22 No.4
This research presents an integration of two control systems, an active tilting controller and a full-wheel steering controller. This integration improves vehicle lateral performances by enhancing road-holding capability, lateral stability, and safety simultaneously. The active tilting controller utilizes an active mass shift to evenly distribute the vertical load at each suspension, and boost road-holding capability. On the other hand, the full-wheel steering controller adjusts rear steering angles to use lateral force at each ground-tyre contact point and amplify the vehicle’s ability to follow the desired yaw rate and global sideslip angle during cornering maneuvers. Considering the improved road-holding capability and the coupling effect of body attitude motion and yaw motion, the two controllers in combination produce a synergistic effect on ride comfort, maneuverability and safety, and improve overall lateral performance. A 7-degree-of-freedom (DOF) linear full car model is used in designing the active tilting controller, while a 2-DOF bicycle model considering the attitude motion of the car body is used in designing a full-wheel steering controller. A 14-DOF complex nonlinear full car model that can truly reflect 6-DOF car body motion is applied to verify the performance of the proposed collaborative system. The simulation results show that the system represents a better lateral stability and steering response in intense driving while ensuring the better heading directivity of the vehicle.