介绍了轨道交通车辆的液压制动控制系统及具有比例阀结构的液压控制单元的组成和工作原理,并分析了轨道交通车辆滑行产生的原因.结合液压制动用低地板有轨电车的独立轮特点,以轨道车辆制动时速度差、减速度和减速度变化率为输入,压力输出系数为输出,依靠人工经验设计隶属度函数和模糊规则,设计了基于模糊控制的液压制动防滑策略,并用Matlab软件进行算法仿真,得到了预期的防滑效果,证明了模糊控制在液压防滑策略中的有效性.

从跨坐式单轨车辆转向架特殊布置的结构特点出发,研究分析单轨车辆对基础制动的要求,总结出单轨车辆采用气体转液压的必然性.介绍了气转液制动夹钳单元产品分类,并以带停车制动的制动夹钳单元为例,详尽介绍制动夹钳单元的结构特征和原理设计计算,并结合空气转液压的增压原理以及液压执行机构对车辆的制动机理,深入的分析气转液制动夹钳单元在运营过程中常用制动和停车制动等各项制动功能的实现过程.最后研究总结用于产品检验的关键试验项目,为产品的质量控制提供参考.

The paper describes current technical situation of low-lfoor tram braking system, and makes introduction from the aspects of the system composition, theory and typical functions. In the future course of development, the electro-hydraulic braking system will become the main type of low-lfoor tram braking system. Small in size, light in weight and modular design are development trend for low-lfoor tram braking system.

以制动系统为研究对象,根据统计学原理和可靠性工程的现场可靠性试验理论设计了制动系统的运行考核计划.根据制动系统运行考核情况,对制动系统的故障进行了记录和统计,采用点估计的形式评估了制动系统的可靠性水平.同时,采用威布尔分布参数估计的方法,得出了制动系统的寿命分布函数.

Computer-bypass electro-pneumatic braking system has adopted in China EMU.The train control instructions are response by electronic brake control unit through network communications.All control functions,including EPED blending-brake control,wheel-slide-protect control,fault diagnosis and storage,are fulfilled.Electronic brake control unit formed by the three technology platforms: ① application software platform based on the principle of fault-driven security controls designed to achieve the braking system of all control strategies and logic,and a good fault diagnostic capabilities for easy system fault location and maintenance are achieved;② hardware platform based on distributed networks and computer-controlled system,which is combined by standardized modular intelligent module;③ Software development platform based on the model V-type development process,which applying the whole process of software development from requirements definition to achieve the final product.

Mass transit vehicles parking accuracy is a comprehensive problem related to different systems.The article describes parking accuracy in ATO mode,and proposes the improvement measures in terms of signal,air brake,electric brake and power-network voltage.

This paper presents the components and function of home-made brake system in transit. Based on the accomplishment of various tests, this brake system was installed in vehicles of Tianjin-Binhai line to examine its performance. By statistic analysis, the nationalization of brake system in transit achieves the application requirements for safety, usability, maintainability and reliability.

一、加强校园环境建设促进良好校风的形成 校园文化是校风的窗口,因此良好的校风要从校园文化建设抓起.所谓校园文化,是以学生为主体,以课外文化活动为主要内容,以校园为主要空间,以校园精神为主要精神,是传统、作风和理想追求的综合体现.

为满足我国270km/h高速列车制动技术条件,铁道科学研究院机车车辆研究所开发研制了新型高速列车制动系统.该系统主要特点体现在微机直通电空制动控制系统,大制动功率盘形基础制动以及高性能电子防滑器等,使高速列车在270km/h的运行状态下,实施空电联合制动时,实现了3100m距离内安全停车的要求.

介绍了WTB和WorldFIP在铁路应用中如何在列车编组变化时实现自组态,总结出实现自组态的一般性原理,并从初运行耗时、数据传输效率、开发成本3个方面对二者作了比较.

In view of the distributed control charact er istics of computer-based direct electro-pneumatic brake system, the supervisio n network based on Control Area Net CAN bus was built. The system transmits th e various distributed brake control unit information through CAN bus to the comp uter for analysis and treatment.The system goes through the conversion of the co mmunication protocol twice. One is between RS232 and CAN bus protocol between ea ch brake control unit and intelligent CAN adapter; the other is between the CAN bus and RS232 protocol on the host adapter, which receives data frames of all br ake control units. Meanwhile, the real time function of supervision system is an alyzed. It has been applied to direct electro-pneumatic brake system of high-s peed train consisting of 2 motor cars and 9 trailers.The centralized supervision of the brake control units has been realized. The system reflects in real time the synchronization and contormity of the response of each brake unit.

可编程逻辑控制器(PLC)由于它的易维护性和可扩展性在机车车辆电气设备上也得到了广泛的应用.本专用PLC控制装置符合铁路机车车辆的供电等级,利用单片机灵活的控制特点,实现了电空制动试验系统辅助电气控制,具有较好的软硬件抗干扰性能.

新开发设计的电空制动试验台数据采集系统能与BCU(制动控制单元)以相同的工作周期进行采集,根据不同的车型将与制动有关的参数以及采集的压力等进行实时计算、仿真制动效果,得到制动过程中列车的减速度、速度、轴制动功、轴功率、总制动力和制动距离等,还能以曲线图表示,并存成数据文件.

我国高速列车(300km/h)将采用电空直通-自动式制动系统,其主制动机为微机控制的直通电空制动装置.介绍了电空制动控制单元(BCU)的工作原理、系统组成和软件实现,对安全联锁装置的设计进行了分析.