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Yang Bo
Wang Xuelin
Hu Yujin
Li Chenggang
Department of Mechanical Design,
Huazhong University of Science
and Technology,
Wuhan 430074, China |
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FLEXIBLE 2-DOF STEERING MODEL OF
MULTI-AXLE HEAVY-DUTY VEHICLE
Abstract: A flexible two degrees of freedom (2-DOF) steering model of multi-axle vehicle (MAV) is presented with considering the effect of frame flexibility based on the classic 2-DOF model. A method to calculate the frame flexibility is derived by using three moments equation. The steering stability of MAV is analyzed. The steering performance of MAV is also researched in frequency domain. Simulation results show that the dynamic effects of flexi-ble model are more severe than rigid model and the flexible effect of frame will weaken the steering stability of MAV. Different disposals of steering axles lead to different steering characteristics of MAV. The in-phase steering mode improves the steering characteristics and stability at high speed. The anti-phase steering mode increases the steering mobility at low vehicle speed.
Key words:
Multi-axle vehicle 2-DOF model Steering characteristic Frame flexibility |