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71.
基于LabVIEW的地铁车辆仿真系统由工业计算机、测试机箱、输入输出模块和测试对象组成,整个仿真系统包括司机台仿真模块和控制系统仿真模块.司机台仿真模块提供仿真信号输入,控制系统仿真模块对输入信号进行逻辑处理,输出控制指令,从而验证列车控制系统的功能. 相似文献
72.
在实际铁路运营过程中,道岔控制电路的动作命令并没有得到有效的事先校验,故障排查耗时耗力,严重影响其可靠性和运行效率。鉴于此,研究并设计一种模拟三相五线制交流转辙机工作状态的虚拟交流转辙机。该虚拟交流转辙机与道岔控制电路相连接,采集动作过程中的电流、电压信息并计算出电流、电压的有效值,既可以由虚拟转辙机上的故障指示灯警示故障,也可在上位机绘制出功率曲线,由此可分析故障现象。不但节省故障排查时间,而且提高道岔控制电路的可靠性和运营效率,具有便携、安全、可靠、成本低的优点。 相似文献
73.
Xu X.-N.Li Y.-N.Li H.Song Z.-D.Liu D.-C. 《铁道工程学报》2018,(11):82-86
Research purposes: CTCS-3 train control system is adopted in Chinese high-speed railway with speed of 300 km/h or higher. It is based on track circuit to check train occupancy and adopt quasi-moving block. In recent years, rapid development of national economy has put forward higher requirements for the capacity of high-speed railway. As a higher level train control system, CTCS-4 train control system can realize virtual block or moving block, and further shorten headway, but it is still in the stage of theoretical research. So this paper aims to analyze the characteristics of high-speed railway, and to propose a scheme for the implementation of CTCS-4 train control system based on track circuit fusion. Research conclusions:(1)When the wireless communication between vehicle and ground is interrupted, transport efficiency of CTCS-4 train control system can not meet the transport demand of high-speed railway.(2)CTCS-4 train control system should have the CTCS-2 backup function, which can make non-communication trains run normally and ensure the transport efficiency.(3)CTCS-4 train control system should integrate track circuit information, which can make RBC obtain position information of non-communication trains, improve the availability of the system and avoid complicated operational rules.(4)Due to complexity of high-speed railway and change of existing equipment, virtual block can be used in early stage of CTCS-4 train control system.(5)The research results can provide some references for CTCS-4 train control system in high-speed railway. © 2018, Editorial Department of Journal of Railway Engineering Society. All right reserved. 相似文献
74.
Introduction Exploring a large number of design variants in aconceptual design phase assists in identifying the mostcost-effective design. However, how to capture userintents is challenging[1]. Although the necessity andadvantages of integrating customers into the innova-tion process are widely recognized[2], customers havea passive role in this design involvement process. Thefirst reason is the complexity of modeling tools. Most3D product mockups are created using commercialCAD packages or … 相似文献
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涂洪涛 《武汉船舶职业技术学院学报》2008,7(2):55-58
VLAN虚拟局域网技术越来越广泛地应用到了局域网中,网络系统设计时,对VLAN的设计策略非常重要。本文介绍了VLAN技术原理和设计方法和策略,并以实例讲解了VLAN的访问过程。 相似文献
78.
视景仿真是虚拟现实的重要组成部分。介绍了开发所需要的软件Creator和Vega,结合列车运行视景仿真的实例说明了利用Creator和Vega软件创建实时仿真程序的过程。仿真结果表明,基于Creator/Vega的列车运行视景仿真系统取得了很好的效果。 相似文献
79.
《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(3):249-275
In this work, a full-state feedback controller is designed to prevent the oscillatory instability or snaking behaviour of an articulated steer vehicle. To design the controller, first, a linearized model of the vehicle is developed and analyzed to identify the most important uncertain tire parameters with regard to the snaking mode. By using this linearized model, the equations of motion are represented in the form of a polytopic system, which depends affinely on the most important uncertain tire parameters. Then, by solving some linear matrix inequalities, both the Lyapunov and state feedback matrices for the robust stabilization of the vehicle are found. The performance of the resulting controller is evaluated by conducting several simulations based on the linearized model. To verify the results from the linearized model analysis, some simulations are also done by a virtual prototype of the vehicle in ADAMS. The results based on the linearized model are reasonably consistent with those from the simulations in ADAMS. They show that the controller can effectively stabilize the vehicle during the snaking mode in different driving conditions. 相似文献
80.
先简支后连续结构体系桥梁施工过程监测及其仿真分析 总被引:1,自引:0,他引:1
以浙江某高速公路跨江大桥引桥的原型桥为例,运用虚拟层合有限单元法,对先简支后连续结构体系的施工过程进行空间仿真分析,系统研究该类结构体系施工过程中的力学特性。认为:首期预应力张拉给预制构件的顶、底板提供了充足的应力储备,保障了连续预应力张拉及后期恒、活载作用下构件的安全;体系转换对构件的应力重分布具有重要的影响;不同的连续端混凝土浇筑和后连续预应力张拉顺序会导致永久支座负弯矩区的压应力储备不同。 相似文献