基于新型减振支柱的半主动悬架特性研究

发布时间：2018-01-14 20:33

本文关键词：基于新型减振支柱的半主动悬架特性研究　出处：《广西大学学报(自然科学版)》2016年02期 　论文类型：期刊论文

【摘要】：为了解决传统半主动悬架减振器有限的阻尼调节范围很难满足所有控制策略要求的问题,提出了刚度和阻尼偶联可调的一体式悬架减振支柱结构。介绍了该减振支柱的结构组成、阻尼和刚度的调节原理与耦合关系,分析了新型减振支柱的非线性刚度和阻尼特性。建立了采用新型减振支柱的二自由度半主动悬架系统模型,运用MATLAB/SIMULINK对半主动悬架模型进行仿真计算。根据仿真结果得到了路面条件、车速、悬架阻尼和空气弹簧初始气压对半主动悬架性能的影响规律。仿真结果显示:在三种典型路面和车速工况下,当减振器的阻尼状态为"高"、空气弹簧的初始气压为0.4 MPa时,半主动悬架的车身加速度、轮胎动载荷和悬架动行程分别比原车被动悬架至少降低6%、10%和18%。表明采用新型减振支柱的半主动悬架可以根据车辆行驶工况,对减振支柱的刚度特性和阻尼特性进行匹配,实现降低车身加速度、轮胎动载荷和悬架动行程的目标,从而改善车辆行驶平顺性、行驶安全性以及机动性。
[Abstract]:In order to solve the traditional Semi-active Suspension Shock Absorber Co. damping adjustment range is very difficult to meet the requirements of all control problems, put forward the coupling stiffness and damping adjustable integral suspension strut structure. Introduces the structure of the shock strut, and adjusting the coupling principle between stiffness and damping, nonlinear analysis the new shock absorber strut stiffness and damping characteristics was established. By two degrees of freedom semi-active suspension system model of the new type shock absorber strut, using MATLAB/SIMULINK semi-active suspension model for simulation. According to the simulation results of pavement condition, get the speed, influence of initial air pressure and air spring suspension damping semi-active suspension performance. Simulation results show that the in three kinds of typical road conditions and vehicle speed, when the damping state of shock absorber is high, the initial pressure of the air spring is 0.4 MPa, semi active suspension The frame body acceleration, suspension travel and tire dynamic load respectively than the original car suspension reduced by at least 6%, 10% and 18%. show that the semi-active suspension model of shock absorber strut can according to the driving condition of vehicles, to match the stiffness characteristics and damping characteristics of the shock strut, the lower body acceleration, the dynamic load of tire and target the suspension travel, so as to improve vehicle ride comfort and driving safety and mobility.

【作者单位】：江苏大学汽车与交通工程学院;
【基金】：国家自然科学基金资助项目(51405202) 江苏省第八批“六大人才高峰”项目资助(2011-ZBZZ-023)
【分类号】：U463.33
【正文快照】： 0引言近年来,主动悬架和半主动悬架技术在多方面快速发展,其中一体式减振支柱的空气弹簧与减振器采用了同轴一体的紧凑结构,在国外的许多高档乘用车的电控悬架上得到广泛应用,这类电控悬架中,分别采用不同的两套装置对其中的空气弹簧刚度和减振器阻尼进行单独控制,实现刚度和

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