共查询到20条相似文献,搜索用时 171 毫秒
1.
2.
本文在对斯太尔重型汽车的双轴转向传动机构进行分析的基础上建立了数学模型,研究了各部分的传动过程,并采用MATLAB语言编写了转向传动机构分析程序,对转向轴内外轮之间,前后轮间的转角匹配,以及最小转弯半径的匹配关系进行了优化。 相似文献
3.
广本雅阁轿车采用常流式液压动力转向系统,该系统主要由动力转向装置、转向操纵机构和转向传动机构组成。动力转向装置包括动力转向器、动力转向油泵、储油罐、油液软管和管路等。转向操纵机构包括转向盘和转向轴等;转向传动机构包括转向垂臂、转向拉杆、减振器及转向节臂等;动力转向装置的转向器为齿轮齿条式,转向油泵为转子式。 相似文献
4.
5.
太脱拉815型汽车的载质量大,轴荷较重,相应的转向力也大。其转向系由转向器、转向传动机构和液压转向助力器组成。转向器为蜗杆指销式,转向助力器为液压式,由转向油泵和转向动力缸组成。 常见故障及排除(详见右表) 预防措施 相似文献
6.
7.
载重汽车的超载限制装置;双前桥结构重型卡车转向传动机构;背负式进气道总成;一种自卸车车厢;一种新型转向后驱动桥;后桥可提升的四轴重型载货车底盘。[编者按] 相似文献
8.
EQ1141液压助力转向系统主要由转向操纵机构、转向器、转向加力装置和转向传动机构组成。转向操纵机构是驾驶员操纵转向器工作的机构,转向器是把方向盘传来的转矩按一定传动比放大并输出,转向传动机构是把转向器输出的力矩传递给转向车轮的机构,包括从转向摇臂到转向车轮的零部件。 相似文献
9.
10.
介绍了应用Pro/E机构运动仿真模块进行运动仿真的工作流程.通过应用Pro/E机构运动仿真模块对双前轴转向传动机构进行匹配设计的实例,论述了商用车双前轴转向传动机构的设计理论要求、初步的传动机构实体建模方法以及转角特性分析方法、理论模型与实体模型的转角特性数据处理与分析,以及实体模型的优化设计方法,并简要介绍了转向传动机构与悬架系统的运动十涉分析方法. 相似文献
11.
12.
重型设备运载车转向机构的设计与计算 总被引:1,自引:0,他引:1
介绍了重型设备运载车的转向机构型式和5种转向模式,要实现这5种转向模式,必须将轮轴设计成机械上相互独立的形式,独立和多轮转向机构只能采用电传操纵方式。文中分析了其电传动力转向系统的要求和特征,对其驱动连杆机构进行了优化设计,取得了良好的设计结果,为该车转向系统的控制与操作提供了必要的数据。 相似文献
13.
《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(9):1153-1170
An important development of the steering systems in general is active steering systems like active front steering and steer-by-wire systems. In this paper the current functional possibilities in application of active steering systems are explored. A new approach and additional functionalities are presented that can be implemented to the active steering systems without additional hardware such as new sensors and electronic control units. Commercial active steering systems are controlling the steering angle depending on the driving situation only. This paper introduce methods for enhancing active steering system functionalities depending not only on the driving situation but also vehicle parameters like vehicle mass, tyre and road condition. In this regard, adaptation of the steering ratio as a function of above mentioned vehicle parameters is presented with examples. With some selected vehicle parameter changes, the reduction of the undesired influences on vehicle dynamics of these parameter changes has been demonstrated theoretically with simulations and with real-time driving measurements. 相似文献
14.
《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(4):375-388
When driving in curves, how do drivers use the force appearing on the steering wheel? As it carries information related to lateral acceleration, this force could be necessary for drivers to tune their internal model of vehicle dynamics; alternatively, being opposed to the drivers' efforts, it could just help them stabilize the steering wheel position. To assess these two hypotheses, we designed an experiment on a motion-based driving simulator. The steering characteristics of the vehicle were modified in the course of driving, unknown to drivers. Results obtained with standard drivers showed a surprisingly wide range of adaptation, except for exaggerated modifications of the steering force feedback. A two-level driver model, combining a preview of vehicle dynamics and a neuromuscular steering control, reproduces these experimental results qualitatively and indicates that adaptation occurs at the haptic level rather than in the internal model of vehicle dynamics. This effect is related to other theories on the manual control of dynamics systems, wherein force feedback characteristics are abstracted at the position control level. This research also illustrates the use of driving simulation for the study of driver behavior and future intelligent steering assistance systems. 相似文献
15.
Role of steering wheel feedback on driver performance: driving simulator and modeling analysis 总被引:1,自引:0,他引:1
D. Toffin G. Reymond A. Kemeny J. Droulez 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2007,45(4):375-388
When driving in curves, how do drivers use the force appearing on the steering wheel? As it carries information related to lateral acceleration, this force could be necessary for drivers to tune their internal model of vehicle dynamics; alternatively, being opposed to the drivers' efforts, it could just help them stabilize the steering wheel position. To assess these two hypotheses, we designed an experiment on a motion-based driving simulator. The steering characteristics of the vehicle were modified in the course of driving, unknown to drivers. Results obtained with standard drivers showed a surprisingly wide range of adaptation, except for exaggerated modifications of the steering force feedback. A two-level driver model, combining a preview of vehicle dynamics and a neuromuscular steering control, reproduces these experimental results qualitatively and indicates that adaptation occurs at the haptic level rather than in the internal model of vehicle dynamics. This effect is related to other theories on the manual control of dynamics systems, wherein force feedback characteristics are abstracted at the position control level. This research also illustrates the use of driving simulation for the study of driver behavior and future intelligent steering assistance systems. 相似文献
16.
建立了运梁车液压连杆转向机构优化数学模型。考虑车辆在转向时的各种影响因素,以转向机构转向的平稳性、传动性能、利用效率为多优化目标。利用快速的模拟退火算法进行优化求解,以避免陷入局部极值,加快收敛速度。仿真结果显示它使转向机构的综合性能得到了较大的改善。 相似文献
17.
Matthijs Klomp Mats Jonasson Leo Laine Leon Henderson Enrico Regolin Stefan Schumi 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2019,57(7):1028-1061
ABSTRACTIn this paper, we describe how vehicle systems and the vehicle motion control are affected by automated driving on public roads. We describe the redundancy needed for a road vehicle to meet certain safety goals. The concept of system safety as well as system solutions to fault tolerant actuation of steering and braking and the associated fault tolerant power supply is described. Notably restriction of the operational domain in case of reduced capability of the driving automation system is discussed. Further we consider path tracking, state estimation of vehicle motion control required for automated driving as well as an example of a minimum risk manoeuver and redundant steering by means of differential braking. The steering by differential braking could offer heterogeneous or dissimilar redundancy that complements the redundancy of described fault tolerant steering systems for driving automation equipped vehicles. Finally, the important topic of verification of driving automation systems is addressed. 相似文献
18.
为了提高分布式无人车轨迹跟踪的精度,提出了基于自主与差动协调转向控制的轨迹跟踪方法。首先,在车辆三自由度模型基础上,基于模型预测控制(MPC)实时计算前轮转角以控制车辆进行自主转向轨迹跟踪。在此过程中,为了提高自主转向下车辆的轨迹跟踪精度与行驶的稳定性,考虑多种因素,利用经验公式及神经网络控制对MPC的预瞄步数和预瞄步长进行多参数调整,实现预瞄时间的自适应控制。其次,在恒转矩需求的情况下,以轨迹偏差为PID控制器的输入及左右轮毂电机转矩为输出进行差动转向控制,实现了差动转向下的轨迹跟踪控制。然后,通过设置权重系数的方法将自主与差动转向相结合。考虑到车辆横纵向动力学因素,采用模糊控制及经验公式对权重系数进行了调整,从而在提高车辆转向灵活性与轨迹跟踪效果的同时保证车辆行驶的稳定性。CarSim与Simulink联合仿真以及实车试验结果表明:与自主转向轨迹跟踪相比,采用变权重系数的协调控制可以在不同的工况下提高车辆的转向灵活性与轨迹跟踪的精度,轨迹跟踪偏差的均方根值改善率达到了11%。所提出的协调转向控制方法可为分布式驱动车辆转向灵活性的提高及轨迹跟踪精度的改善提供一种新的思路。 相似文献
19.
20.
现在人们对汽车驾驶的舒适陛和安全性要求越来越高,汽车传统的转向系统无法满足低速时的灵活性与高速时的稳定性要求,可变转向比技术的应用,有效地解决了这一矛盾。文章介绍了当前应用和开发的可变转向比转向系统,指出该系统使汽车具有一定的智能化,提高了驾驶的安全性和舒适性,可变转向比技术是未来转向系统的主要发展方向之一。 相似文献