基于多轴电液伺服转向系统的重型车辆操纵稳定性研究  

Handling and Stability of Heavy Vehicles Based on Multi-axle Electro-hydraulic Servo Steering System

作　　者：舒月 刘晓阳 施嘉俊 洪越 杜恒[1] SHU Yue;LIU Xiao-yang;SHI Jia-jun;HONG Yue;DU Heng(School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, Fujian 350108)

机构地区：[1]福州大学机械工程及自动化学院,福建福州350108

出　　处：《液压与气动》2021年第4期74-81,共8页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51975122)。

摘　　要：车辆的操纵稳定性是影响车辆行驶安全性的关键因素,操纵稳定性分析通常基于经典线性二自由度车辆动力学模型。该模型忽略了转向系统的影响,直接以前轮转角为输入,无法充分描述车辆的操纵稳定性。以多轴电液助力式转向车辆为研究对象,在二自由度动力学模型的基础上进一步考虑了电液伺服转向系统对车辆操纵稳定性的影响,建立以转向盘转角为输入的多轴电液助力式转向车辆二自由度动力学模型并进行仿真分析。结果表明,电液伺服转向系统模型的加入显著增加了多轴车辆到达稳态转向的时间,且在小转角转向时车辆瞬态质心侧偏角峰值降低,车辆操纵稳定性有所改善。因此,考虑电液伺服转向系统部分的模型可有效提升重型多轴车辆转向性能分析的准确度。Vehicle handling stability is a key factor affecting vehicle driving safety.The analysis of vehicle handling stability is usually based on the classical linear 2-DOF vehicle dynamics model.The model ignores the influence of steering system,and take the front wheel angle as the input.In this paper,the multi-axle electro-hydraulic power-assisted steering vehicle is taken as the research object,and the influence of electro-hydraulic servo steering system on vehicle control stability is further considered on the basis of the 2-DOF dynamic model.The results show that the model of electro-hydraulic servo steering system significantly increases the time for multi-axle vehicles to reach steady-state steering,and the peak of the lateral deflection angle of the vehicle's transient centroid decreases and the vehicle's steering stability is improved.Therefore,the model considering the electro-hydraulic servo steering system can effectively improve the accuracy of steering performance analysis of heavy multi-axle vehicles.

关 键 词：二自由度动力学模型 多轴转向 电液伺服转向系统 操纵稳定性 

分 类 号：TH137[机械工程—机械制造及自动化] TH113