共查询到19条相似文献,搜索用时 218 毫秒
1.
汽车转向机构的非线性运动学模型 总被引:1,自引:0,他引:1
本文对由梯形机构和麦弗逊独立悬架构成的汽车转向机构建立起非线性的空间机构运动学模型,此模型具有转向输入我有,左转向轮的跳动和右转向轮的跳动3个输入自由度,能全面地反映转向机构的运动学特性。 相似文献
2.
汽车双横臂悬架转向机构优化设计 总被引:1,自引:1,他引:1
运用多刚体系动力学中R-W方法进行机构动行计算,编制了汽车双横壁悬架转向机构优化设计通用程序。优化模型中考虑了车轮跳动转向误差的影响,并根据转向过程中的实际要求计入两个权重函数,使转向误差分布更合理。 相似文献
3.
4.
5.
柯愈治 《中国汽车保修设备》1998,(2):25-29
轿车仅前轮转向已不能满足车速高速化的实际需要,由此应运而产生各种型式的四轮转向机构。电控电动式四轮转向机构的出现,使人们看到了实现可遥控汽车自动转向的可能。本文阐述了阿克曼理论的局限性及其发展,并简要介绍了各种类型的四轮转向机构的特性和结构,从中可看到轿车转向系的发展趋势。 相似文献
6.
非独立悬挂车辆前轴所用转向梯形机构,以模型逼近方式图解求得梯形壁臂长和梯形角与内轮最大转角及内外轮最大转角差之间的关系,并以“帆形曲线”图青示之。为转向梯形机构设计选取结构参数提供快速便捷的方法。 相似文献
7.
分析了四轮转向车辆两比例系数对操纵稳定性的影响。建立了四轮转向车辆操纵动力学模型,分析了两比例系数对四轮转向车辆稳定性的影响,得出了车辆横摆角速度和侧向加速度与前轮转角的传递函数,借助Matlab/Simulink,根据四轮转向车辆的两组参数进行仿真分析,并与传统前轮转向车辆进行了比较,结果表明四轮转向车辆两比例系数在操纵稳定性上有各自的优势。研究结果可为评价四轮转向车辆的系统设计和控制律提供理论依据。 相似文献
8.
9.
10.
传统的定转向传动比机构显然无法满足上述要求,但宝马的主动转向系统通过叠加转向机构完全能够实现。该系统传动比在10~20之间,低速情况下,通过双行星齿轮机构伺服电机的调整角和转向盘转角同向输入,使得系统的传动比较小,实际上是增大了驾驶员的转向角输入, 相似文献
11.
12.
汽车转向拉杆及球头销是汽车上的重要部件,其强度和可靠性直接关系到汽车行驶安全,为满足该部件的产品要求,设计了一种转向拉杆及头销寿命试验台,介绍了试验台的试验技术参数,试验台的组成及原理,该试验台经工厂使用,效果良好。 相似文献
13.
14.
15.
16.
This work presents an experiment on the relationships between subjective and objective evaluations of vehicle handling. Ten
cars were examined objectively in several open-loop driving dynamics manoeuvres and subjectively by test persons in typical
traffic situations. Results are extracted from a stationary test (the Slowly Increasing Steer Test), and a dynamical test
(the Frequency Response Test). The subjective measurements are obtained from drivers on a rural road course via a questionnaire,
which was developed to separately investigate the quantity level perception, the so-called “Niveau”, and the more qualitative
“Liking”. These subjective “measurements” are embedded into a two-channel definition of “Steering Comfort” as a genus for
“Steering Discomfort” and “Character”. The article concentrates on developing a statistical method for the consideration of
correlations amongst the subjective/objective data. In doing so, the variance in example subjective Niveau ratings can be
significantly explained by several objective quantities. Indicators for co-domains of validated discomfort characteristics
and hints for endeavouring character Liking ranges are detected. 相似文献
17.
18.
Y. G. Cho 《International Journal of Automotive Technology》2009,10(4):431-439
In this paper, an analytical model with suitable vehicle parameters, together with a multi-body model is proposed to predict
steering returnability in low-speed cornering with what is expected to be adequate precision as the steering wheel moves from
lock to lock. This model shows how the steering response can be interpreted in terms of vertical force, lateral force with
aligning moment, and longitudinal force. The simulation results show that vertical steering rack forces increase in the restoring
direction according to steering rack displacement for both the inner and outer wheels. As lateral forces due to side-slip
angle are directed toward the medial plane of the vehicle in both wheels, the outer wheel pushes the steering wheel in the
returning direction while the inner wheel does not. In order to improve steering returnability, it is possible to increase
the total steering rack force in both road wheels through adjustments to the kingpin axis and steering angle. This approach
is useful for setting up a proper suspension geometry during conceptual chassis design. 相似文献
19.
P. E. Pfeffer M. Harrer D. N. Johnston 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2008,46(5):413-428
For the on-centre handling behaviour of vehicles the steering system is absolutely important. To investigate the interaction of the vehicle and steering system a validated, especially tailored simulation model was developed. Some meaningful vehicle and steering system parameters are altered to show the influence on steering wheel torque, steering feel and understeer. The results underline the importance of an accurate steering system model. Identified measures to improve the centre feel and steering response were a stiffer torsion bar, a higher cornering stiffness or a lower overall steering ratio. The steering response, however, suffers when the centre feel is improved by a higher trail. The steering rack friction reduces mainly the steering response while the steering column friction decreases the centre feel whereas a stiffer torsion bar lessens the understeer tendency. 相似文献