共查询到18条相似文献,搜索用时 312 毫秒
1.
2.
3.
随着东风商用车车载电器的应用越来越多,有一些意想不到的问题随之而来。天龙牵引车上转向灯配装的闪光器改为闪光单元,实现了主车与挂车转向灯控制的分离,即挂车线路正常并与主车的连接器接通时,打开转向开关,挂车转向指示灯及挂车转向灯才能正常工作,否则拄车转向灯不能正常工作。 相似文献
4.
正参与工作的控制单元的任务分配。挂车辅助主控制单元。供电控制单元J519;挂车辅助功能的主控制器;确定挂车辅助系统当前的系统状态;在需要时激活组合仪表上的警告显示和文字提示信息;计算挂车辅助系统的各种参数并把这些参数传至MMI显示屏上显示;要求转向控制单元提供前桥具体转向角,必要时还有后桥转向角;必要时激活带挂车车辆的保护制动;在连接上挂车后执行自适应过程。从属控制单元。 相似文献
5.
6.
介绍了双轴全挂车的设计要求、设计原理,并针对全挂车高速行驶过程中容易产生的摆振、转向轮回正能力差等问题及其产生原因作了详细分析。 相似文献
7.
全挂车轮转向装置设计 总被引:1,自引:0,他引:1
全挂车转向装置分为轴转向和轮转向两种形式,由于轮转向两种形式。由于轮转向装置转向角度小,制造工艺复杂。成本高,一般较少应用。便全挂车采用轮转向装置可降低车厢地板高度,且其机动性较轴转向全挂列车好,推导了轮转向传动连杆机构的解析关系式及优化设计目标函数和约束条件,并给出了相应算例。 相似文献
8.
由于全挂汽车列车的主车与挂车之间的相互作用,在转弯时,或在侧向力的作用下,常常导致主车、转向架和挂丰三者之间产生剧烈的周期性摆动现象。为研究解决这一问题,将全挂车列车简化为主车、牵引架和挂车前轴、挂车车身和挂车后轴三个部分,并建立了运动方程式,研究分析了全挂车列车转向时车辆各参数的瞬态响应。 相似文献
9.
10.
多轴全挂车转向机构优化设计 总被引:2,自引:0,他引:2
本文对多轴全挂车转向过程中车轮运动规律进行了分析,找出滑移量的计算方法,用优化理论和铰接四杆机构通用分析方法对多轴全挂车转向机构进行优化设计,有多种目样函数可供选用,既可使转角误差最小,又可使滑移量最小,优化结果已用于某车辆厂的产品中,本文对多轴汽车转向系的优化设计也有一定的参考价值。 相似文献
11.
拖挂式房车制动稳定性的研究 总被引:1,自引:0,他引:1
在建立6自由度拖挂式房车转弯制动数学模型的基础上,对拖挂式房车的制动过程进行了仿真计算,分析了转向角、转向角速度和房车车轮制动力对房车横摆角速度的影响以及各参数之间的协调优化。为寻求房车车轮制动力与转向角、转向角速度、制动时间等因素的最优关系,达到拖挂式房车在行驶过程中实时控制房车制动力,提高拖挂式房车行驶的稳定性奠定了基础。 相似文献
12.
《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(4):561-593
A high-speed optimal trailer steering controller for a tractor–semitrailer is discussed. A linear model of a tractor–semitrailer with steered trailer axles is described, and an optimal trailer steering controller is introduced. A path-following controller is derived to minimise the path-tracking error in steady-state manoeuvres using active trailer steering. A roll stability controller is introduced by adding the lateral acceleration of trailer centre of gravity as another objective in the steering controller, so as to improve roll stability in transient manoeuvres. A strategy to switch between these two control modes is demonstrated. Simulation results show that the steering controller can ensure good path tracking of articulated vehicles in steady-state manoeuvres and improve roll stability significantly in transient manoeuvres, while maintaining the path-tracking deviation within an acceptable range. Tests with an experimental tractor–semitrailer equipped with a high-bandwidth active steering system validate the controller design and simulation results. The roll stability controller reduces the measured rearward amplification by 27%. 相似文献
13.
《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(7):992-1015
We set out to answer the question: At what hitch angle does it become impossible for a vehicle and trailer to continue to backing up without getting into a jackknife? Jackknifing during backing up of trailers occurs when the hitch angle increases to a point such that the vehicle and trailer fold together about the hitch point like a jackknife. If the backward motion is continued, the jackknife effect progressively worsens, until the vehicle and trailer are in physical contact with each other. Jackknifing can result in traffic disruptions and wasted time, and can potentially cause damage or personal injury. Our goal is to analytically determine the ‘critical hitch angle’ (θcr), the hitch angle threshold beyond which a continued reverse motion causes an inescapable jackknifing. In this paper, we provide a formal definition of θcr for slow backing up of vehicle–trailer systems on a level solid surface, beyond which the vehicle must stop backing up and revert to forward motion in order to escape from jackknifing. The critical hitch angle is sub-categorised into Absolute (θcr, a) and Directional (θcr, d) critical hitch angles depending on the operating constraints and vehicle steering objectives. One solution for θcr is posed as a numerical solution to the steady-state conditions of the dynamic equations. The effects of such hitch angle limitations are demonstrated through simulation. Also, a warning system making use of the θcr is proposed. Such warning systems can assist drivers in avoiding jackknifing while backing up a vehicle–trailer system. 相似文献
14.
15.
16.
《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(6):391-420
Two nonlinear lateral control algorithms are designed for a tractor-semitrailer type commercial heavy vehicle. The baseline steering control algorithm is designed utilizing input-output linearization. To enhance the lateral stability and furthermore reduce tracking errors of the trailer, braking forces are independently controlled on the inner and outer wheels of the trailer. The coordinated steering and braking control algorithm is designed based on the multivariable backstepping technique. Simulations conducted using the complex model show that the trailer yaw errors under coordinated steering and independent braking force control are much smaller than those without independent braking force control. 相似文献
17.
Lateral Control of Commercial Heavy Vehicles 总被引:9,自引:0,他引:9
Chieh Chen Masayoshi Tomizuka 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2000,33(6):391-420
Two nonlinear lateral control algorithms are designed for a tractor-semitrailer type commercial heavy vehicle. The baseline steering control algorithm is designed utilizing input-output linearization. To enhance the lateral stability and furthermore reduce tracking errors of the trailer, braking forces are independently controlled on the inner and outer wheels of the trailer. The coordinated steering and braking control algorithm is designed based on the multivariable backstepping technique. Simulations conducted using the complex model show that the trailer yaw errors under coordinated steering and independent braking force control are much smaller than those without independent braking force control. 相似文献