基于Simulink对轮式装载机行驶平顺性的研究

Research on Ride Comfort of Wheel Loader Based on Simulink

摘要: 为解决轮式装载机行驶平顺性问题，提出了一种行驶稳定减振策略，分别建立了加入行驶稳定系统前后的整机动力学模型，利用Matalab/Simulink软件搭建了E级工程路面及二自由度车辆振动模型，进行装载机行驶平顺性仿真分析，结果表明行驶稳定系统的刚度具有非线性输出特性，影响减振系统刚度的参数有初始充气压力、初始充气容积和等效负载，分析了加行驶稳定系统后的装载机对整机减振性能的影响，以垂直加速度为评价指标，装载机在加行驶稳定系统后，振动幅值降低，振动衰减快，在单位阶跃信号激励下振动幅值降低了48.96%，振动衰减时间快；在E级工程路面上垂直加速度均方根降低了56.53%，峰值降低了48.55%。

Abstract: In order to solve the riding comfort problem of wheel loader, a strategy of driving stability and vi-bration reduction was proposed. The dynamics models of the whole machine before and after adding the driving stability system were established respectively. The stiffness characteristics and vibration reduction performance of the system with driving stability were analyzed by Mata-lab/Simulink software. The results show that the stiffness of the driving stability system is non-linear, and the parameters that affect the stiffness of the vibration damping system include initial charging pressure and initial charging volume. After the loader adds the driving stability system, the vibration amplitude decreases and the vibration attenuation is fast. Under the excitation of unit step signal, the vibration amplitude decreases by 48.96% and the vibration attenuation time is fast. The root mean square of vertical acceleration decreases by 56.53% and the peak value decreases by 48.55% on the road surface of Class E engineering.