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以多体动理学理论为基础,利用机械动力分析软件ADAMS来建立某车麦弗逊前悬架模型并进行了运动学仿真分析。针对分析结果中出现的几个参数变化过大情况的悬架模型做了参数优化,比较优化前后的模型参数可以看出优化后的悬架模型对汽车的性能影响较好。 相似文献
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本文以多刚体系统动力学为理论基础,应用多体运动学与动力学仿真软件ADAMS 中的Car专业模块建立了麦弗逊悬架多刚体模型。在对该悬架模型进行了两侧车轮同向跳动的仿真分析后,研究了前束角(Toe Angle)、车轮外倾角(Camber Angle)、主销后倾角(Caster Angle)、主销内倾角(Kingpin Inclination Angle)及车轮转向角(Steer Angle)五个悬架运动特性参数,同时研究了这五个运动特性参数对汽车的稳态响应特性、直线行驶的稳定性、操纵稳定性等众多性能的影响。此外,以改善悬架的性能为目标,从ADAMS/Car模块中导入ADAMS/Insight模块,对麦弗逊悬架五个运动特性参数进行了优化。最后,对优化前后的悬架运动特性参数曲线进行了比较,并从比较中得到较好的运动特性参数,从而对悬架进行了优化。 相似文献
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针对麦弗逊悬架减振器侧向力问题,建立某车型的前麦弗逊悬架ADAMS参数化模型,通过优化螺旋弹簧实际作用力线达到优化减振器侧向力的目的。结果表明,通过合理的设计,螺旋弹簧的实际作用力线可以达到100%消除麦弗逊悬架减振器侧向力的问题。 相似文献
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麦弗逊悬架减振器侧向力对减振器寿命和悬架性能影响很大,系统分析减振器侧向力对麦弗逊悬架设计具有重要意义。减振器的侧向力取决于车辆运动时受到的地面的作用力和悬架的几何结构,本文综述了车辆行驶时车轮上下运动的侧向力、加速、减速、转弯时侧向力的分析,确定了麦弗逊悬架的几何结构对减振器侧向力的影响因素,并通过国内外最新产品的实例说明通过改变悬架的几何结构来减小减振器侧向力的具体方法和产生的效果。最后对减振器侧向力进行了总结,并对未来麦弗逊悬架的研发工作提出了一些建议。 相似文献
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孙建民 《筑路机械与施工机械化》2011,28(6):80-83
基于工程车辆的作业特点,针对影响工程车辆作业安全舒适性的减震系统的关键技术进行评述。根据工程车辆减震系统的发展现状,结合国内外油气悬架系统的先进技术及特点,探讨了油气悬架研究的关键技术,认为开发新型油气悬架减震系统符合现代工程车辆对悬架系统的要求和发展方向,将会对中国工程车辆的技术升级与进步有较大的促进作用。 相似文献
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D. O. Kang S. J. Heo M. S. Kim W. C. Choi I. H. Kim 《International Journal of Automotive Technology》2012,13(1):109-122
This study presents the robust design optimization process of suspension system for improving vehicle dynamic performance
(ride comfort, handling stability). The proposed design method is so called target cascading method where the design target
of the system is cascaded from a vehicle level to a suspension system level. To formalize the proposed method in the view
of design process, the design problem structure of suspension system is defined as a (hierarchical) multilevel design optimization,
and the design problem for each level is solved using the robust design optimization technique based on a meta-model. Then,
In order to verify the proposed design concept, it designed suspension system. For the vehicle level, 44 random variables
with 3% of coefficient of variance (COV) were selected and the proposed design process solved the problem by using only 88
exact analyses that included 49 analyses for the initial meta-model and 39 analyses for SAO. For the suspension level, 54
random variables with 10% of COV were selected and the optimal designs solved the problem by using only 168 exact analyses
for the front suspension system. Furthermore, 73 random variables with 10% of COV were selected and optimal designs solved
the problem by using only 252 exact analyses for the rear suspension system. In order to compare the vehicle dynamic performance
between the optimal design model and the initial design model, the ride comfort and the handling stability was analyzed and
found to be improved by 16% and by 37%, respectively. This result proves that the suggested design method of suspension system
is effective and systematic. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(7):1173-1190
This study examines the uncertainties in modelling a quarter car suspension system caused by the effect of different sets of suspension parameters of a corresponding mathematical model. To overcome this problem, 11 sets of identified parameters of a suspension system have been compared, taken from the most recent published work. From this investigation, a set of parameters were chosen which showed a better performance than others in respect of peak amplitude and settling time. These chosen parameters were then used to investigate the performance of a new modified continuous skyhook control strategy with adaptive gain that dictates the vehicle's semi-active suspension system. The proposed system first captures the road profile input over a certain period. Then it calculates the best possible value of the skyhook gain (SG) for the subsequent process. Meanwhile the system is controlled according to the new modified skyhook control law using an initial or previous value of the SG. In this study, the proposed suspension system is compared with passive and other recently reported skyhook controlled semi-active suspension systems. Its performances have been evaluated in terms of ride comfort and road handling performance. The model has been validated in accordance with the international standards of admissible acceleration levels ISO2631 and human vibration perception. 相似文献
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在对某型轿车多连杆后悬架系统建立ADAMS多体动力学模型基础上,对该悬架系统进行了仿真分析,分析了轮跳对后轮定位参数的影响,并结合ADAMS/Insight模块对该悬架部分硬点的位置进行了DOE优化。优化结果表明,对该悬架系统所做的优化设计是正确有效的,改善了该悬架系统的运动特性。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(1):121-134
Linear matrix inequality (LMI) methods, novel techniques in solving optimisation problems, were introduced as a unified approach for vehicle's active suspension system controller design. LMI methods were used to provide improved and computationally efficient controller design techniques. The active suspension problem was formulated as a standard convex optimisation problem involving LMI constraints that can be solved efficiently using recently developed interior point optimisation methods. An LMI based controller for a vehicle system was developed. The controller design process involved setting up an optimisation problem with matrix inequality constraints. These LMI constraints were derived for a vehicle suspension system. The resulting LMI controller was then tested on a quarter-car model using computer simulations. The LMI controller results were compared with an optimal PID controller design solution. The LMI controller was further tested by incorporating a nonlinear term in the vehicle's suspension model; the LMI's controller degraded response was enhanced by using gain-scheduling techniques. The LMI controller with gain-scheduling gave good results in spite of the unmodelled dynamics in the suspension system, which was triggered by large deflections due to off-road driving. 相似文献