共查询到19条相似文献,搜索用时 93 毫秒
1.
现状20世纪80年代以来,集装化运输的飞速发展极大地促进了全球物流业的发展和经济的繁荣。与此同时,物资运输作为赢得战争胜利的关键因素,作为军队后勤保障的重点,其集装化运输方式也逐渐成为各国军队战役后勤补给运输的主要方式。概述早在“集装化运输”理念诞生的初期,这种运输模式所特有的快速、高效、灵活等特点便引起了世界各国军方后勤部门的普遍关注,而真正将集装化运输理念付诸实践并获得良好的军事效益则开始于整体自装卸挂车的研制成功。在遂行物资运输保障作业的过程中,整体自装卸挂车成为港口、火车站、机场与运输目的地之间的… 相似文献
2.
1995年10月,北京。 “全军后勤新装备展示”现场,一辆被称为“MZX98—12整体自装卸补给车”的军用汽车,在一名驾驶员的操作下,为军委、总部首长和现场观众做了精彩的自装卸表演。 这项由军事交通学院研制的成果获得了2001年度军队科技进步一等奖。 日前,我们采访了该课题的主要完成人詹隽青副教授。 动力来源于责任 在1985年举办的国际汽车展览会上,詹隽青和老教授唐天元、闵嘉义等第一次看到了某国展出…… 相似文献
3.
4.
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
5.
ELM是应用于挂车空气悬架系统的电子控制高度调节模块,可以实现挂车车身高度的升高,保持和降低,以方便货物的装卸. 相似文献
6.
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
8.
9.
10.
西班牙最大的挂车企业Lecitrailer一直都引领着西班牙挂车行业的发展。2020年Lecitrailer继续在西班牙领先根据西班牙挂车、半挂车、挂车工业协会的数据显示,Lecitrailer在2020年西班牙挂车的市场份额为23.69%,总共新注册挂车2576辆。2020年后,Lecitrailer与西班牙其他竞争对手的差距更大了。西班牙挂车市场第二名的市场占有率为16.98%,第三名企业的市场占有率为11.32%。 相似文献
11.
以现有的机场拖车为原型,针对制动时存在的问题,提出了一些改进建议和想法,使拖车在牵引车制动时能利用自身的惯性力自行制动,减少制动距离和时间,以符合当前机场大运货量对制动距离的要求。 相似文献
12.
针对专用车厂家设计生产中的实际需要,用LabVIEW图形化语言编写了多轴挂车车架的强度计算程序,能快速对车架进行强度校核和刚度校核,可大大提高设计效率。 相似文献
13.
14.
15.
提出利用联合制动系统将电涡流缓速器应用到铰接车辆上的方法。联合制动系统由拖车上的电涡流缓速器和挂车电控制动系统组成,二者在ECU控制下可以保证拖车与挂车制动力的合理分配以及对拖车及挂车的制动实施时间进行干预。采用该系统还可以减少铰接车辆行驶中某些事故的发生。 相似文献
16.
《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
17.
介绍了目前多轴线挂车设计中普遍采用的转向角期望值的确立方法并指出其存在的问题,引入了牵引距、转向距等概念,给出挂车列车在无侧滑的纯滚动要求下目标转角的正确计算方法,对某型挂车的转向实例进行了分析并作出结论。 相似文献
18.
Edward A. Saibel Shang-Li Chiang 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1972,1(3):211-225
The towed trailer method for skid resistance measurements is a practical one for characterizing the friction characteristics of highway pavements, and has been standardized by the ASTM 11). Numerous papers have been published about the improvement of equipment and field-testing techniques but little has been done toward a theoretical explanation.
This paper presents a mathematical model of the trailer which includes roll, pitch, and vertical motion. The skid resistance calculated by using this model gives an excellent check on the standard ASTM skid number formula. The response time and damping effect after locking one test wheel can be clearly seen in this model. Possible effects of the dimensions of trailer, stiffness of suspension system, tire pressure, etc. to skid resistance can also be examined. 相似文献
This paper presents a mathematical model of the trailer which includes roll, pitch, and vertical motion. The skid resistance calculated by using this model gives an excellent check on the standard ASTM skid number formula. The response time and damping effect after locking one test wheel can be clearly seen in this model. Possible effects of the dimensions of trailer, stiffness of suspension system, tire pressure, etc. to skid resistance can also be examined. 相似文献
19.
R. S. Sharp 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1982,11(1):43-61
A mathematical model for the representation of longitudinal oscillations which can occur in car/trailer systems in braking, when the trailer brakes are applied through compression of the towing hitch, is described. The model is used to show how the trailer braking system parameters affect the steady deceleration performance of the vehicle combination, and the stability, in the linear system sense, of the steady motions. The sensitivity of the stability to other system design parameters is also examined.
Digital simulation of the motions occurring in response to a step input of car braking torque is reported, with the results confirming the predictions of the linear stability analysis, and also showing the influence of backlash in the trailer brake actuating mechanism.
The system is shown to be capable of self-excitation in a “shunting” mode, in which the car and trailer motions are in antiphase, with the stability/damping property critically dependent on drawbar damping, and only weakly dependent on other system parameters. The characteristic frequency of the “shunting” mode oscillations is shown to be controllable via the stiffness of the trailer brake linkage, but this frequency is closely related to the steady drawbar deflection which occurs in uniform deceleration.
The model behaviour described provides a basis for the design of relevant systems whose longitudinal dynamic characteristics will be satisfactory. 相似文献
Digital simulation of the motions occurring in response to a step input of car braking torque is reported, with the results confirming the predictions of the linear stability analysis, and also showing the influence of backlash in the trailer brake actuating mechanism.
The system is shown to be capable of self-excitation in a “shunting” mode, in which the car and trailer motions are in antiphase, with the stability/damping property critically dependent on drawbar damping, and only weakly dependent on other system parameters. The characteristic frequency of the “shunting” mode oscillations is shown to be controllable via the stiffness of the trailer brake linkage, but this frequency is closely related to the steady drawbar deflection which occurs in uniform deceleration.
The model behaviour described provides a basis for the design of relevant systems whose longitudinal dynamic characteristics will be satisfactory. 相似文献