共查询到18条相似文献,搜索用时 171 毫秒
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附加气室空气悬架是通过在空气弹簧气室上增加一个气室,从而进一步降低空气弹簧刚度和提高阻尼的悬架。建立了附加气室空气悬架1/4二自由度系统动力学模型和数学模型,并对其进行了计算机仿真实验。通过观察仿真结果,分析了附加气室空气悬架对汽车行驶平顺性的影响因素。 相似文献
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应用MSC.ADAMS及ANSYS软件,在ADAMS/Car[1]中建立了中型客车前空气悬架系统刚柔体耦合的动力学模型。模型的各类参数主要通过试验和Solidworks软件获得。在ADAMS/Car中,利用虚拟仿真试验对单纵臂式非独立悬架进行了多种性能分析,并结合空气悬架在设计及使用过程中出现的主要问题进行了探讨,提出了相应的解决办法。通过模型参数化分析及不同方案的仿真试验对比表明,利用基于ADAMS/Car软件建立的空气悬架系统模型可对悬架性能做出正确预测,对空气悬架系统的设计具有工程指导意义。 相似文献
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为解决精密设备在半挂车运输中的振动问题,采用了一种半挂车鹅颈柔性牵引装置。在ADAMS中建立了整车多刚体动力学仿真模型,并对整车的悬架系统进行了匹配计算,通过随机路面输入的平顺性仿真分析,取得较好的结果,减轻了车辆对精密设备在运输过程中的振动破坏。 相似文献
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从空气弹簧非线性特性人手对汽车空气弹簧悬架系统进行分析,运用Matlab/Simulink软件进行空气弹簧非线性曲线拟合和悬架系统的仿真计算,在此基础上进行了实际随机输入路面上的汽车平顺性试验,并对试验仪器及过程进行了详细描述。通过对试验结果与仿真数据的比较,证实了理论分析的正确性和仿真的准确性。 相似文献
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针对半挂车普通双桥悬架的缺陷,提出了向心悬架的设计思想,对向心悬架双桥半挂车的运动进行了理论分析,并提出了设计计算的方法。 相似文献
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Yang Chen Yunbo Hou Andrew Peterson 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2019,57(4):617-635
Failure mode and effects analysis are performed for a dual levelling valve pneumatic suspension to determine the effect of suspension failure on tractor–semi-trailer dynamics, using a detailed model of suspension pneumatics coupled with a truck dynamic model. A key element of failure analysis in suspensions with one or two levelling valves is determining the effect on the vehicle body roll when one or more failures occur. The failure modes considered are mainly the suspension pneumatic components, including clogged levelling valve, bent control rod, disabled lever arm, and punctured or leaking connectors and pipes. The pneumatic suspension is modelled in AMESim, with critical parameters established through component testing. Upon validating the AMESim component model experimentally, the pneumatic suspension model is integrated into TruckSim for studying the consequences of suspension failure on truck dynamics. The simulation results indicate that the second levelling valve in a dual-valve arrangement brings a certain amount of failure redundancy to the system, in the sense that when one side fails, the other side can compensate for the failure. Equipping the trailer with dual levelling valves brings an additional stabilising effect to the vehicle in the event of tractor suspension failure. 相似文献
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L. F. P. Etman R. C. N. Vermeulen J. G. A. M. Van Heck A. J. G. Schoofs D. H. Van Campen 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2003,38(2):85-101
Summary A stroke dependent damper is designed for the front axle suspension of a truck. The damper supplies extra damping for inward deflections rising above 4 cm. In this way the damper should reduce extreme suspension deflections without deteriorating the comfort of the truck. But the question is which stroke dependent damping curve yields the best compromise between suspension deflection working space and comfort. Therefore an optimization problem is defined to minimize the maximum inward suspension deflection subject to constraints on the chassis acceleration for three typical road undulations. The optimization problem is solved using sequential linear programming (SLP) and multibody dynamics simulation software. Several optimization runs have been carried out for a small two degree of freedom vehicle model and a large full-scale model of the truck semi-trailer combination. The results show that the stroke dependent damping can reduce large deflections at incidental road disturbances, but that the optimum stroke dependent damping curve is related to the acceleration bound. By means of vehicle model simulation and numerical optimization we have been able to quantify this trade-off between suspension deflection working space and truck comfort. 相似文献
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由于传统半挂牵引车驾驶室采用的是半悬浮被动悬置,减振效果不好,对于经常进行中长途运输的半挂牵引车司机而言,连续较长时间的驾驶会使司机暴露于机械性全身振动(WBV)之中。由于目前还没有确凿的证据证明半挂牵引车司机的腰痛等职业病与全身振动有直接关联,故为探索有关驾驶半挂牵引车的健康风险程度进行了试验验证。对同一辆试验车在不同路面、载荷和车速的多工况下进行了研究,并将试验结果与标准GB/T 13441.1-2007附录B中的健康指南警告区域进行了对比。研究表明,在当前的行驶条件下,我国半挂牵引车司机每天的连续驾驶时间最多不应超过5.5 h。 相似文献
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以空气悬架大客车为研究对象,采用多体系统动力学的理论方法,建立某型客车的虚拟样机仿真模型,并进行平顺性仿真。最后测试车身上相应位置的加速度值,对模型进行验证。 相似文献
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I. Besselink F. Van Asperen 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1994,23(1):53-70
The demands upon the dynamic behaviour of a vehicle can be stated as an optimization problem. The optimum solution is calculated using an iterative optimization algorithm. Scaling the problem by non-linear transformations reduces the number of iterations. Lagrange multipliers provide useful information about the sensitivity of the optimum with respect to changes of the constraints. The analysis of the dynamic behaviour is performed in the frequency domain. New structural variants are calculated using system synthesis. As an example, the engine, cab and wheel suspension systems of a tractor/semi-trailer have been optimized all together. 相似文献
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W. -N. Bao L. -P. Chen Y. -Q. Zhang Y. -S. Zhao 《International Journal of Automotive Technology》2012,13(7):1057-1065
A fuzzy adaptive sliding mode controller for an air spring active suspension system is developed. Due to nonlinearity, preload-dependent spring force and parameter uncertainty in the air spring, it is difficult to control the suspension system. To achieve the desired performance, a fuzzy adaptive sliding mode controller (FASMC) is designed to improve the passenger comfort and the manipulability of the vehicle. The fuzzy adaptive system handles the nonlinearity and uncertainty of the air suspension. A normal linear suspension model with an optimal state feedback control is designed as the reference model. The simulation results show that this control scheme more effectively and robustly isolates vibrations of the vehicle body than the conventional sliding mode controller (CSMC). 相似文献
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长期在不良工况的道路上驾驶会降低驾驶员的乘坐舒适性。随着人们对乘坐舒适性需求不断提升,空气弹簧的优势尤为明显。文章提出了一种基于LQR控制策略的自适应空气悬架系统的创新设计方案,提出的LQR控制器采用粒子群算法进行优化。以客车空气悬架为研究对象,采用MATLAB软件对空气悬架系统的被动和自适应动力学模型进行了设计和仿真。仿真结果表明,自适应空气悬架系统在保证车辆稳定性的同时,降低了车辆在随机道路上的最大位移幅值,从而提高了车辆的平顺性。 相似文献