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| Modeling and Simulation Analysis of Multi-DOF Automotive EPS Load Resistance Torque Characteristics |
| ZHOU Qi1,FAN Wei-jun1,GUO Bin2,LUO Zai1,PAN Yin-bin3 |
1. College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, Zhejiang 310018, China
2. Hangzhou Wolei Intelligent Sci-Tech Co., Ltd, Hangzhou, Zhejiang 310018, China
3. Ruili Group Ruian Auto Parts Co., Ltd. Wenzhou, Zhejiang 325000, China |
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Abstract In order to study the electric power steering(EPS) stress state in the nonlinear complex system composed of roads, tires, vehicles, etc., starting from the EPS rack and pinion steering mechanism, combined with the unified tire (UniTire) model, the vehicle 7-DOF dynamics model and the front wheel alignment parameters, an EPS load resistance torque model based on the 7-DOF vehicle steering model is established to analyze the variation characteristics of EPS load resistance torque under different vehicle speeds and steering wheel angles, the multi-DOF modeling and simulation are carried out through MATLAB/Simulink software. Finally, the double lane-change simulation experiment and steering transient response simulation experiment are carried out. The experimental results show that compared with the 3-DOF vehicle steering model, the model can better reflect the variation characteristics of the vehicle EPS load resistance torque with the steering wheel angle under different vehicle speeds.
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Received: 18 April 2022
Published: 25 June 2023
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2023, Vol. 44 
