基于液压活塞式惯容器的车辆悬架性能研究

Performance of Vehicle Suspension Based on Hydraulic Piston Inertial Container

阐述了液压活塞式惯容器的基本结构、工作原理与承载力大的特点,建立了考虑摩擦力、寄生阻尼力和油液弹性效应的惯容器非线性力学模型。在数控液压伺服激振台上对液压活塞式惯容器进行了力学性能试验,基于试验结果,利用Matlab参数辨识工具箱对非线性力学模型中的参数进行辨识。在此基础上建立了包含液压活塞式惯容器非线性因素的车辆惯容器-弹簧-阻尼器(inerter-spring-damper,简称ISD)悬架动力学模型并进行了仿真分析。结果表明,当考虑液压活塞式惯容器非线性因素时,车辆ISD悬架系统的车身加速度均方根值增加5%,而轮胎动载荷与悬架动行程均方根值均有所减小,降低了车辆的行驶平顺性。

The basic structure,working principle and the characteristics of large bearing capacity of hydraulic piston type inertial container are expounded,and the nonlinear mechanical model of an inertial container is established considering friction force,parasitic damping and oil elasticity effect.The mechanical performance test of the hydraulic piston inertial container is carried out on the numerical control hydraulic servo vibration table.Then,based on the test results,the parameters in the nonlinear mechanical model are identified by MATLAB parameter identification toolbox.Finally,a dynamic model of the vehicle inertial-container-spring-damper(ISD)suspension including the identified nonlinear factors is established and simulated.The results show that the root-mean-square value of the vehicle body acceleration of the vehicle ISD suspension system increases by 5%,while the root-mean-square value of the dynamic tire load and suspension working space slightly decreases,which reduces the driving comfort of the vehicle.