Road Vehicle Suspension System Design - a review

Based mainly on English language literature, information relating to the design of automobile suspension systems for ride comfort and control of wheel load variations for frequencies below body structure resonances is reviewed. The information is interpreted in the context of vehicles which travel through a wide speed range on roads of markedly differing quality, which do so carrying different loads and which are required to possess good handling qualities.

Sections are devoted to describing road surfaces, modelling vehicles and setting up performance criteria, and to passive, active, semi-active and slow-active system types. Methods for deriving active system control laws are outlined. Strengths and weaknesses of the various systems are identified and their relative performance capabilities and equipment requirements are discussed. Attention is given to adaptation of the suspension or control system parameters to changing conditions. Remaining research needs are considered.     

Design Synthesis of a Vehicle Suspension System Using Multi-Parameter Qptimization

The transmission of road-generated vibrations into a vehicle body is treated as a source-path-receiver problem. The suspension system acts as the path, and improved isolation can be achieved by having a single compliant bushing at the connecting point of the shock absorber to the body with none at the other end. A mathematical model is derived for such a system which would enable detailed parameter investigation to be undertaken using the gradient method of optimization. An expression for the absolute displacement transmissibility of the body is derived and the optimization procedure is applied in order to evaluate the optimum values of the non-dimensional variables involved. This minimizes the maximum motion transmitted to the body from the road surface over a broad frequency range. Design data which are presented non-dimensionally for parameter variations show the influence of three variables: the bushing stiffness, the resonant frequency ratio and the damping coefficient upon the transmissibility.     

Active Damping in Road Vehicle Suspension Systems

Low order, linearized dynamic models of road vehicle suspension systems are analyzed to provide insight into the benefits of suspensions incorporating generalized velocity feedback compared with conventional passive suspensions. Damping forces from passive dampers are supplemented by forces generated by an active element requiring a power supply. A simple criterion is developed which indicates whether or not the introduction of activedamping forces will result in significant benefit for pneumatic tired vehicles.

An extended active suspension concept involving a high-gain load leveler as well as active damping is analyzed. The realization of active or semi-active damping forces through electrical or hydraulic means is briefly discussed.     

IVECO汽车悬架系统性能参数设计方法

本文给出一种IVECO汽车面向行驶平顺性分析的简化仿真模型,应用仿真模型对某型号IVECO汽车进行随机不平路面输入下的汽车悬架系统性能参数仿真试验研究,得出了悬架系统性能参数对汽车行驶平顺性指标—车身振动加速度均方根值的影响规律,为确定该车悬架系统性能参数优化设计的设计空间和初始值提供依据。     

车辆半主动悬架系统设计与试验研究

在可调减振器设计及试验的基础上,建立了半主动悬架系统的数学模型,分析了模糊控制半主动悬架系统的动态性能,开发了以C8051F005单片机为主控件的半主动悬架模糊控制器,搭建了半主动悬架全真试验台,并进行了台架试验.结果表明,设计的半主动悬架及其控制系统性能稳定、可靠,汽车行驶平顺性明显优于传统被动悬架,为半主动悬架的实际应用奠定了基础.     

道路车流量管理控制系统设计

介绍了一种道路车流量管理控制系统的设计方案。它由车流量监测装置、预警信号装置、违规抓拍装置、计算机控制系统、周边道路交通状况显示牌等组成,是一个集监测、预警、控制、指挥于一体的全自动、一体化的系统。     

一种新型农用车辆减震座椅的设计

随着人们对人体健康逐渐重视,对农用车辆的舒适度进行改进显得迫不及待。本文充分考虑了振动幅度和动挠度两个方面,设计一种新型农用车辆减震座椅,采用阻尼可调减震器代替现在农用车辆广泛使用的一般阻尼不可调减震器,将单刚度弹簧改换成双螺旋弹簧,从而改善座椅系统的动态振动特性。     

Aerodynamic Design of a Solar Road Vehicle

Solar road vehicles have very specific design requirements. This makes their aerodynamic characteristics quite different from classic sedan vehicles. In the present study, the computational model of a typical solar road vehicle was developed to investigate its aerodynamic forces and flow characteristics. Computations were performed assuming the steady viscous flow and using the Reynolds-averaged Navier Stokes equations along with the k-ω turbulence model. The obtained results indicate some important findings that are commonly not present for classic sedan vehicles. In particular, a contribution of the viscous drag force to the overall drag force is considerably larger (41 %) than it is the case for the standard passenger road vehicles, where the form drag force dominates over the viscous drag force. Surface pressure distribution patterns indicate a favorable aerodynamic design of this vehicle. In particular, larger pressure coefficients on the top of the vehicle body as compared to the bottom surface contribute to increasing a downforce and thus the vehicle traction. The airfoil-shaped crosssection of the designed cockpit canopy has favorable properties with respect to reduction of the aerodynamic drag force.     

专用汽车设计中悬挂系统的运动仿真

以Pro/Engineer参数化建模的动态模拟为理论基础,提出并解决了专用车设计中悬挂系统动态仿真的课题,为优化专用汽车改装设计的整体布置,建立模拟运动的理论分析。     

智能网联先导区道路交叉口车路协同系统设计

近年来,车路协同是汽车与交通行业发展的重要方向之一,而车路协同环境建设和推广也成为先导区建设的重中之重。车路协同系统利用无线通信、传感器检测、高精度地图定位、人工智能、计算机等众多技术来获取车辆和道路信息,在实现人、车、路充分协同的同时,从而达到主动提高道路交通安全、最优化利用系统资源、缓解交通拥挤的目标,形成安全、效率、环保的道路交通系统。先导区一般选址在车流量大、道路环境复杂、附近居住人口密集的区域。先导区内汽车智能与网联化测试、V2X场景实现均需要借助于车路协同系统环境。本文介绍了先导区道路交叉口车路协同系统涵盖的技术,以及实现的功能和信息服务场景,并从车端、路端给出了相应场景的解决方案。     

四轮独立驱动与转向试验车悬架系统设计

采用四轮独立驱动与线控转向的试验车悬架系统和传统汽车有较大的差别。文章在详尽分析独立驱动与线控转向试验车特点后,确定了悬架系统的方案并对所设计悬架系统参数进行设计计算。应用CATIA软件进行三维建模;最后应用ANSYS软件对悬架系统中主要零件立柱进行了有限元分析。     

某商用车驾驶室全浮式悬置系统开发

论述了某商用车驾驶室全浮式悬置系统结构设计及主要参数控制要点,提出了DMU运动分析校核、基于EXCEL的参数初始设计等设计手段,并运用有限元分析、动力学模拟等分析手段进行了优化,使该车较好的满足了可靠性和驾驶室振动舒适性要求,避免了后期大量的设计改进工作,从而缩短了产品开发周期并降低了产品研发成本.     

轻型商用车悬架匹配

为优化某轻卡乘坐舒适性,首先对悬架系统的刚度、阻尼匹配过程进行了分析总结,给出了悬架刚度、阻尼的匹配流程。然后针对某些受开发周期及资源限制,无法进行实车调校及精确仿真的车型给出了基于理论计算及统计数据的悬架阻尼匹配方法。从阻尼比选择,各速度段阻尼比分布,双向比分布等方面分析,总结了方便、快速,且实车验证切实有效的悬架系统阻尼匹配方法。     

汽车主动悬架系统的试验研究

在分析汽车传统被动悬架的基础上,给出了一种新型主动悬架结构。介绍了该主动悬架的工作原理,建立了二自由度的主动悬架数学模型。采用天棚控制策略,设计并研制了主动悬架样机及试验台架,进行了被动悬架与主动悬架的台架对比试验。试验结果表明,与被动悬架相比,该主动悬架能有效改善汽车的动态性能。     

车辆悬架减振系统研究及仿真

舒适性的好坏很大程度上取决于车辆的悬架减振系统。汽车振动是影响汽车性能的重要因素,这种振动会严重地影响汽车的平顺性和操纵稳定性。因此车辆的减振十分重要,本文针对车辆悬架减振系统,利用AMESIM建立1/4车体力学模型进行仿真,从平顺性的角度对系统进行分析。在建立1/4车体力学模型的基础上,改变模型参数,即可对该系统性能进行分析。缩短了开发周期,节约了成本。并对结果进行分析,证明了该方法简单且切实可行,以及利用该软件建模的方便性。     

悬架系统对整车性能的影响

本文系统分析了悬架系统对整车性能的影响,并且给出了整车因悬架问题导致的各种故障以及从设计角度及质量控制角度如何避免。     

Design of a Predictive Semiactive Suspension System

In this paper we present an original design procedure for semiactive suspension systems. Firstly, we consider a target active control law that takes the form of a feedback control law. Secondly, we approximate the target law by controlling the damper coefficient f of the semiactive suspension. In particular, we examine two different kinds of shock absorbers: the first one uses magneto-rheological fluid instead of oil, while the second one is a solenoid valve damper. In both cases the nonlinear characteristics force-velocity of the damper are used to approximate the target law. To improve the efficiency of the proposed system, we take into account the updating frequency of the coefficient f and compute the expected value of f using a predictive procedure. We also address the problem of designing an asymptotic state observer that can be used not only to estimate the current state but also to predict the value that the state will take at the next sampling time.     

Design of a Predictive Semiactive Suspension System

In this paper we present an original design procedure for semiactive suspension systems. Firstly, we consider a target active control law that takes the form of a feedback control law. Secondly, we approximate the target law by controlling the damper coefficient f of the semiactive suspension. In particular, we examine two different kinds of shock absorbers: the first one uses magneto-rheological fluid instead of oil, while the second one is a solenoid valve damper. In both cases the nonlinear characteristics force-velocity of the damper are used to approximate the target law. To improve the efficiency of the proposed system, we take into account the updating frequency of the coefficient f and compute the expected value of f using a predictive procedure. We also address the problem of designing an asymptotic state observer that can be used not only to estimate the current state but also to predict the value that the state will take at the next sampling time.     

微型电动汽车后悬架设计

在当今社会,汽车已经发展成人们日常生活中的代步工具,更快更舒适成为了今后汽车的研究方向,因此悬架系统成为了人们首要的研究目标.本设计以两座电动汽车后悬架为研究对象,通过对两种类型的悬架的优缺点进行对比,选取最适合两座电动汽车后悬架的悬架类型,采用非独立悬架以达到制造简便、方便维修且结构简单的目的.对后悬架的弹性元件和减...     

State Observer Design for an Adaptive Vehicle Suspension

This paper presents a state observer design for an adaptive vehicle suspension. Based on simulations, two main issues are investigated, (a) the selection of measurement signals in relation to estimation accuracy and sensing needs and (b) the effects of variations in both road inputs and vehicle parameters on estimation accuracy. Meanwhile, the system stabilities are also examined concerning the effects of using different combination of measurement states and the system parameter variations in practical, possible ranges.