前轮定位参数对悬架性能的影响分析

悬架几何参数是影响麦弗逊式独立悬架运动特性的重要因素。采用多体动力学仿真分析软件ADAMS建立了某车1／2麦弗逊式独立悬架的3D运动学仿真模型，分析了该悬架的主要几何参数随车轮跳动的变化量及变化趋势。对该悬架的性能进行了评价，研究结果为悬架设计提供了一定的依据。     

基于ADAMS/Car的麦弗逊悬架运动学分析与仿真

本文从悬架运动学角度分析,在多体动力学软件ADAMS/Car环境下建立某型汽车麦弗逊式悬架模型,并进行双轮同向激振仿真试验,得到悬架运动学参数随车轮行程变化的曲线,为设计麦弗逊式悬架及分析整车操纵稳定性和平顺性提供依据。     

基于ADAMS/Insight的汽车前悬架仿真与优化

以某轿车麦弗逊式前悬架为研究对象,运用ADAMS/Car建立其多体动力学虚拟样机模型,对该模型设计双轮平行跳动仿真试验,运用ADAMS/Insight对悬架设计参数进行优化设计,选取9个硬点坐标值作为设计变量,选取主要的5个悬架性能参数（车轮前束等）作为优化目标,进行灵敏度分析、多目标优化,得到优化后的硬点坐标值。结果表明,优化后的麦弗逊式前独立悬架各性能均得到了较大幅度提升,对麦弗逊悬架在工程中的优化设计工作具有一定的参考意义。     

基于凯恩方法的汽车悬架实时仿真模型

提出了一种用于汽车动力学实时仿真的悬架建模方法。将悬架系统模型建成为连接车身和车轮的无质量复合铰,并基于凯恩方法推导了悬架复合铰的运动方程。在满足动力学实时仿真要求的同时不降低悬架系统的运动学精度。利用该方法建立了某轿车面向结构的麦弗逊式前悬架模型,并集成到由符号计算软件产生的该轿车的多体动力学模型中。仿真与实车道路试验结果的对比表明该悬架模型具有较高的仿真精度。     

基于ADAMS的麦弗逊式独立悬架优化仿真分析

针对轿车前悬架系统对车辆操纵稳定性有较大影响,文章利用机械系统动力学分析软件ADAMS建立了带有转向系统的麦弗逊式独立悬架模型,并对其进行仿真分析.通过修改前悬架的定位参数来对其进行优化设计,从而研究悬架参数对车辆操纵稳定性的影响.数值计算表明,优化后的悬架使得前轮定位参数基本达到一个最优值,为改进汽车操纵稳定性提供了参考依据.     

应用于车辆实时动力学仿真的悬架模型

针对车辆动力学实时仿真的要求提出一种新的悬架建模方法。将悬架系统视为车身与车轮之间的无质量复合约束，利用悬架杆系的多体运动学模型和准动力学模型来分析悬架系统的运动和力学传动特性，从而悬架动力学问题简化为代数方程组的求解。与基于侧倾／力矩中心理论建立的等交悬架模型相比，该方法可分析悬架杆系内部作用力，并能更准确地描述悬架在水平方向的约束作用；与应用传统多体动力学理论建立的模型相比，该方法解决了仿真实时性的问题。基于这种方法建立了国产某轿车麦弗逊式悬架模型，并将仿真结果和道路试验及ADAMS仿真结果进行了对比，有较好的一致性。     

基于ADAMS的悬架车轮定位参数优化设计

悬架作为汽车的重要组成部分之一,对汽车的操稳性和舒适性有着重要影响。以麦弗逊式悬架为研究对象,利用ADAMS软件建立其动力学模型,结合多目标优化方法,对悬架各个结构参数进行最优试验分析,得到麦弗逊式悬架优化性能参数。通过对优化前后的前悬架性能进行对比分析,得出最优结构参数。优化实验结果表明:优化后的麦弗逊式悬架综合性能得到了进一步提升。     

基于Adams软件的独立悬架运动学性能研究

汽车前悬架系统部件之间的运动关系十分复杂,对整车的操纵性和平顺性有很大的影响。在现有的汽车双横臂前悬架数据的基础上,用ADAMS软件建立悬架模型,并对模型进行仿真计算,研究分析评价悬架数据的合理性。最后分析对比在该车上采用麦弗逊式独立悬架代替双横臂式独立悬架的优越性。     

基于ADAMS/CAR的麦弗逊式悬架建模和仿真

本文通过机械动力学分析软件ADAMS/CAR建立某车的麦弗逊式前悬架模型,在运动学和弹性运动学模式下分别对模型进行仿真分析。为悬架进一步的研究和优化设计提供理论参考和指导。     

基于ADAMS的麦弗逊前悬架优化设计

汽车悬架系统为一多体系统,部件之间的运动关系十分复杂,传统的人工计算很难将悬架的各种特性表述清楚。以多刚体系统动力学理论为基础,应用机械系统动力学仿真分析软件ADAMS中的Car专业模块建立该车的麦弗逊式前悬架多刚体模型,并采用ADAMS/Insight模块进行参数分析,同时进一步进行悬架布置的优化,在一定程度上提高了整车的行驶平顺性和操纵稳定性性能。     

双横臂-螺旋弹簧悬架受力及刚度阻尼特性非线性分析

运用虚功原理导出了悬架受力、弹簧刚度与悬架刚度之间、阻尼器参数与系统阻尼之间的非线性函数关系。开发了简单实用的双横臂-螺旋弹簧独立悬架仿真分析与设计软件,应用于某微型电动汽车的悬架系统设计。利用ADAMS建立双横臂悬架模型,通过仿真验证了公式及其结论的正确性。     

汽车全工况操纵和制动动力学17自由度的建模与仿真

本文描述了１７自由度汽车全工况操纵与制动过程动力学模型的建模，仿真与验证。该模型考虑了侧风，有无防抱系统，高速，变车速，双移线转变制动等各种极端工况，仿真结果与美国密执安大学的仿真结果十分吻合，证实了该算法与模型具有很好的精度。     

扭杆式双横臂独立悬架改型设计与运动特性分析

针对某车型扭杆式双横臂独立悬架前轮距加宽的要求,提出了改型设计的几种方案,并根据轮距和定位参数随轮跳变化的曲线趋势确定了最优方案.建立了扭杆式双横臂独立悬架虚拟样机模型,通过对比静态平衡位置时定位参数的理论值与仿真值,验证了模型的准确性.通过分析5种运动特性曲线变化趋势可知,前束角变化最为灵敏,从而可确定上下摆臂各加长40mm、转向器长度不变、转向拉杆每侧加长40mm的方案为最优.     

轻型越野车车轮定位与悬架的相互影响

分析了轻型越野车采用悬架系统相应的车轮定位特性,通过对侧倾中心和车身侧倾角的分析,得出了车轮定位与悬架相互影响的工程理论研究方法,并通过ADAMS仿真分析和道路试验给予了验证。     

A comparative study on fault detection methods of rail vehicle suspension systems based on acceleration measurements

Reliability of the railway vehicle suspension system is of critical importance to the safety of the vehicle. On-line health condition monitoring for the suspension system of rail vehicles offers a number of benefits such as preventing further deterioration of vehicle performance, enhancing vehicle safety, increasing operational reliability and availability, and reducing maintenance costs. It is desirable to timely detect the fault and monitor the performance degradation of vehicle suspension systems. In this paper, a comparative study on fault detection methods of urban rail vehicle suspension systems is considered. A novel sensor configuration is proposed where the underlying vehicle system is equipped with only acceleration sensors in the four corners of the carbody, the leading and trailing bogie, respectively. A mathematical model is developed for the considered vehicle suspension system. Both model-based and data-driven approaches are studied for the suspension fault detection problem. The robust observer, the Kalman filter combined with the generalised likelihood ratio test method, the dynamical principle components analysis and the canonical variate analysis approaches are applied to the fault detection problem. The simulation is carried out by means of the professional multi-body simulation tool, SIMPACK. In addition, the advantages and disadvantages of these methods are compared. The simulation results show that the data-driven methods outperform the model-based methods.     

Process Save Reduction by Macro Joint Approach: The Key to Real Time and Efficient Vehicle Simulation

Applying a non-linear model reduction method to the tire suspension system of road vehicles enables an automatic transfer of complex offline simulation vehicle models to a mathematical model, which fits the real time simulation requirements. The basic assumption, that high frequent inner suspension dynamics are not relevant to handling manoeuvres, converts the differential algebraic equation system (DAE) of suspensions with kinematical closed loops into pure elasto-kinematical linkage equations. The equations of motions can be represented as an ordinary differential equation system (ODE) and considerable simulation time reductions are obtained for the off-line simulation and real time simulation is enabled. This so-called macro joint approach is an alternative modelling method to the well-known look-up table representation of suspension kinematics but it keeps the parameterisation of the original suspension model and is suitable to parameterised real time MBS models. With a second step the dynamics, caused by compliance in the suspension bushings, are reduced to their quasi-static behaviour. The consideration of these quasi-elasticity has nearly no influence on the necessary simulation time. This contribution shows the theoretical background and demonstrates the advantage of the macro joint model reduction approach on a typical vehicle example.     

Process Save Reduction by Macro Joint Approach: The Key to Real Time and Efficient Vehicle Simulation

Applying a non-linear model reduction method to the tire suspension system of road vehicles enables an automatic transfer of complex offline simulation vehicle models to a mathematical model, which fits the real time simulation requirements. The basic assumption, that high frequent inner suspension dynamics are not relevant to handling manoeuvres, converts the differential algebraic equation system (DAE) of suspensions with kinematical closed loops into pure elasto-kinematical linkage equations. The equations of motions can be represented as an ordinary differential equation system (ODE) and considerable simulation time reductions are obtained for the off-line simulation and real time simulation is enabled. This so-called macro joint approach is an alternative modelling method to the well-known look-up table representation of suspension kinematics but it keeps the parameterisation of the original suspension model and is suitable to parameterised real time MBS models. With a second step the dynamics, caused by compliance in the suspension bushings, are reduced to their quasi-static behaviour. The consideration of these quasi-elasticity has nearly no influence on the necessary simulation time. This contribution shows the theoretical background and demonstrates the advantage of the macro joint model reduction approach on a typical vehicle example.     

双横臂独立悬架ADAMS建模及运动特性分析

利用ADAMS建立了某轻型车完整的双横臂独立悬架运动学仿真模型,为反映车辆的真实行驶工况,对左、右车轮测试平台分别创建了随机激励。通过仿真分析,揭示了运动特性参数在悬架运动过程中的变化规律,并对原导向机构存在的问题进行了优化计算。结果表明,前轮定位参数在优化前、后的变化量较小,均在设计要求的范围内;轮距和前轮侧向滑移量的变化较大,优化后二者都在理想的范围内变动,达到了预期优化目标。     

空气悬架客车平顺性仿真与实验研究

以某大客车为研究对象，分别拟合前后悬架空气弹簧刚度，在Matlab中建立八自由度整车模型，并进行平顺性仿真与实验，将其仿真结果与试验结果进行比较，结果显示，所建立的动力学模型及仿真结果是正确的。     

厢式半挂车空气悬架系统的仿真分析

空气悬架系统是保证厢式半挂车行驶平顺性的重要组成部分。为研究该系统的各主要结构参数对半挂车动态响应的影响,采用M atlab/S imu link/D sp的仿真平台,对某半挂车进行建模,并建立了随机路面输入的实时仿真分析系统。试验结果验证了仿真分析系统的正确性,为空气悬架系统的设计与匹配提供了依据。