共查询到19条相似文献,搜索用时 218 毫秒
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针对某轻型商用车稳态回转时侧倾度偏大的问题对其悬架进行优化改进。基于ADAMS/car搭建整车多体动力学模型,通过前悬架反向平行轮跳试验、后悬架理论计算验证了悬架仿真模型的准确性。进行整车稳态回转工况和转向盘中间位置转向工况仿真分析,结果表明,车身侧倾度偏高。为实现操纵稳定性优化分析的流程自动化,提出了基于modeFRONTIER的联合仿真方法。以悬架设计参数为优化变量,以汽车的侧倾度与横摆角速度响应滞后时间为优化目标,采用拉丁超立方试验设计方法拟合得到混合代理模型,并结合多目标粒子群优化算法对悬架系统进行多目标优化,获得了悬架系统优化方案。优化结果显示,在不影响平顺性的前提下,汽车车身侧倾度降低了13.93%,横摆角速度响应滞后时间降低了2.75%,整车操纵稳定性得到了提升。 相似文献
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以某4x4全驱沙漠车为研究对象,提出了一种简化的整车数学模型,建立了整车侧倾角与板簧、横向稳定杆刚度的函数关系,得到悬架侧倾角刚度对整车侧倾性能的影响。并介绍了横向稳定杆角刚度计算方法,前后悬架侧倾角刚度匹配原则。 相似文献
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文章首先进行了主动横向稳定杆结构和应用现状分析,研究了主动横向稳定杆核心零部件和系统的先进技术进展,接着分别介绍了汽车液压互联系统、电磁悬架、奔驰ABC悬架技术;研究车身侧倾控制技术更重要的意义在于降低车轮的侧倾转向角和侧倾外倾角,进而使转向更加中性并且提升汽车在弯道的极限性能。 相似文献
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S. Rakheja Research Assistant Professor S. Sankar Professor Director R. Ranganathan Graduate Student 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1988,17(1):81-104
The rollover immunity levels of articulated tank vehicles with partial loads are investigated. A static roll plane model of the articulated vehicle employing partially filled cylindrical tank is developed. The vertical and lateral translation of the liquid cargo due to vehicle roll angle and lateral acceleration, encountered during steady turning, are evaluated. The roll moments arising from vertical and lateral translation of the liquid cargo are determined and incorporated in the roll plane model of the vehicle. The adverse influence of the unique interactions of the liquid within the tank vehicle, on the rollover limit of the articulated vehicle is demonstrated. The influence of compartmenting of the tank on the steady turning roll response of the vehicle is analyzed, and an optimal order of unloading the compartmented tank is discussed. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(1-2):81-104
SUMMARY The rollover immunity levels of articulated tank vehicles with partial loads are investigated. A static roll plane model of the articulated vehicle employing partially filled cylindrical tank is developed. The vertical and lateral translation of the liquid cargo due to vehicle roll angle and lateral acceleration, encountered during steady turning, are evaluated. The roll moments arising from vertical and lateral translation of the liquid cargo are determined and incorporated in the roll plane model of the vehicle. The adverse influence of the unique interactions of the liquid within the tank vehicle, on the rollover limit of the articulated vehicle is demonstrated. The influence of compartmenting of the tank on the steady turning roll response of the vehicle is analyzed, and an optimal order of unloading the compartmented tank is discussed. 相似文献
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J. Darling L.R. Hickson 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1998,29(5):309-329
Active roll control is known to offer substantial improvements in ride and handling performance over the most sophisticated passive suspension systems. However although many different active suspension systems have been discussed and analysed through simulation little information regarding experimental performance data from a prototype active roll control system has been published. This study focuses on the design, development, commissioning and experimental evaluation of a roll control suspension based on active anti-roll bar actuation. In tests, the prototype vehicle demonstrated excellent steady state and dynamic roll cancellation within the lateral acceleration range of 0.5g. Subjective assessments of the system confirmed the benefits of a level ride together with the added benefit accrued from the elimination of roll dynamics. 相似文献
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为分析扭转梁C特性对稳态转向性能的影响,文章以模态综合法建立了某乘用车扭转梁后悬柔性模型,对建立的原型车进行侧向力C特性仿真,与对标车进行对比发现仿真与试验值存大较大差异,且侧向力前束特性存在较大的过度转向趋势.通过优化安装衬套的刚度使得原型车与试验结果吻合,最后对整车进行稳态回转仿真发现,负的前束侧向力特性不利于转向,优化后的模型提高了整车不足转向. 相似文献
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本文研究液罐汽车在不满载并以稳定车速转弯行驶的条件下,因液体货物质心位置的变化而引起汽车侧倾角的变化规律。建立了有关力学模型与数学模型。研究结果表明在装载条件相同的条件下与运送固体货物汽车比较,液罐汽车的侧倾稳定性变坏;加设纵向隔板对侧倾稳定性有改善作用。 相似文献
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This paper develops a computational model that can analyze the kinematics and compliance characteristics of the front suspension
of a commercial vehicle. This computational model is called the flexible multi-body dynamic model because it is developed
by interfacing the finite element model of the multi-leaf spring with the dynamic model of the front suspension. In this paper,
the bump mode and roll mode tests are performed with a suspension parameter measuring device (SPMD). An excitation load for
creating the bump mode and roll mode motion is applied on the left and right tires slowly in in-phase and out-of-phase modes.
In the test, wheel rate, toe angle change, caster angle change, and camber angle change, which together represent the wheel
alignment, are measured along with the longitudinal and lateral wheel center loci which together represent the wheel center
trajectory change. The reliability of the developed computational model is verified by comparing the simulation results with
the SPMD test results. The developed flexible multi-body computational model will provide useful information on kinematics
and compliance characteristics in the earliest stages of the commercial vehicle design process. 相似文献
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Design of active suspension and electronic stability program for rollover prevention 总被引:1,自引:0,他引:1
This paper presents a method for the design of a controller for rollover prevention using active suspension and an electronic
stability program (ESP). Active suspension is designed with linear quadratic static output feedback control methodology to
attenuate the effect of lateral acceleration on the roll angle and suspension stroke via control of the suspension stroke
and tire deflection of the vehicle. However, this approach has a drawback in the loss of maneuverability because the active
suspension for rollover prevention produces in vehicles an extreme over-steer characteristic. To overcome this drawback of
the active suspension based method, ESP is designed. Through simulations, the proposed method is shown to be effective in
preventing rollover. 相似文献
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主动悬架系统对汽车侧翻稳定性改善分析 总被引:4,自引:0,他引:4
针对被动悬架系统侧翻稳定性比较差的问题,提出采用主动悬架系统的方法进行改善。通过汽车侧倾运动状态分析,建立了被动悬架系统、主动悬架系统和控制系统模型。模拟分析得到主动悬架系统使得汽车在弯道行驶时的侧倾角有效值下降了92.8%,侧倾角加速度有效值下降了78.2%,侧翻因子有效值下降了92.6%。结果表明:利用主动悬架系统可以有效地降低汽车非直线行驶时的侧倾角以及侧倾角加速度,提高汽车的侧翻稳定性,是提高汽车非直线行驶状态下安全性的一个合理的解决方案。 相似文献