浅析列车自动控制系统信号系统接口方案

为实现客运专线的列车自动控制,信号系统接口方案的设计至关重要。接口方案是影响工程的重要因素,接口方案的设计应考虑周全,否则将影响后期运营的服务质量。对客运专线信号系统的列车运行控制系统、联锁系统、调度集中系统和集中监测系统等4个系统接口方案进行了分析,并阐述每个子系统的内部和外部接口。所分析的接口方案均符合中国列控系统的技术规范,以供客运专线信号系统的接口管理和设计参考,但在建设实施中还应根据其适应运营的特殊要求加以选择。     

列车运行自动控制(ATO)算法的研究

通过分析列车自动控制算法所面临的问题，提出了具有自适应、智能化的列车自动驾驶算法及推理机结构。     

Participating mass in colliding risers

One of the main challenges in estimating impact energy in collisions between marine risers is the assessment of the riser mass involved in the collision. Evidently the entire riser mass does not contribute to the collision. Hence, the question is: What is the equivalent riser mass which contributes to the impact energy? This article presents three different ways of estimating the riser mass participating in the collision energy. The first method is strictly experimental. The second method uses a numerical experiment together with system identification techniques. The third method is a strictly analytical method, which results in an asymptotically upper bounded estimate of the participating mass. Two risers are examined as case studies. The first riser is a 1 : 100 model scale riser used in collision experiments carried out at Marintek's towing tank in Trondheim, Norway. The second case uses a real world riser in use on the Troll B oil production platform operating in the North Sea. The proposed methods yield consistent and comparable results. Received for publication on Feb. 1, 1999; accepted on July 8, 1999     

IPS式波能转换装置实验研究

介绍了一种新型高效的IPS式波能转换装置,通过不同波况下实验装置输出功率的比较,得出了适合该装置工作的最佳入射波周期,为IPS式波能转换装置的工程应用提供了有益的参考。     

铁路客运段信息化综合管理系统

根据我国铁路客运段的现状,集成基于GSM-R的无线移动售/补票子系统、车长办公子系统、餐车管理子系统、列车GPS定位与自动语音播报子系统、列车移动视频监控子系统五大车载系统,构建客运段信息化综合管理系统。在客运段建立集成平台,统一数据接口,规范客运业务,提供WEB查询服务,并对其中的两个关键子系统给出实现方案。铁路客运段信息化综合管理系统已在武汉铁路局下属客运段实际运行,取得了良好效果。     

Wear simulation for the centre plate arrangement of a freight car

The bodies of many railway freight cars in many countries of the world are coupled to the running gear by means of a body centre plate that makes a friction pair with a centre bowl. During motion, the bogie is rotated and moved with respect to the car body. This leads to wear on the contact surfaces. Lubrication is inexpedient in this case because the friction forces damp the vibrations (so-called bogie hunting) during motion. Usually, centre plates exhibit noticeable wear after two years of operation. Reducing wear requires knowing details of the wear process which, in turn, requires computer simulation of freight car motion for an operation period of 10–15 years. The purpose of this paper is to develop a universal method for wear simulation of friction pairs that could be used, in particular, for the centre plate of a freight car.     

变频器在供热锅炉节能技术上的应用与研究

根据风机与泵类轴功率与转速的立方成正比的特点，分析供热锅炉辅机泵与风机的流量、扬程（压头）、功率与转速间的关系，阐述变频调速节能原理，并举例比较了水泵采用变频调速控制与阀门控制所产生的效益情况。提出变流量运行时，泵与风机应采用变频技术，以降低成本，延长设备使用寿命，提高经济效益。     

铁道客车空调机组在车辆行驶过程中的性能及试验研究

分析了铁道客车空调机组在车辆运行过程中的通风量和冷凝风量的变化及对制冷量的影响,由此解释了空调机组运行故障的原因。针对车辆段客车空调机组检修试验中存在的问题,提出了要结合车辆运行和静态两种工况进行模拟试验的观点,并对具体的试验方法进行了讨论。     

基于高频PWM整流逆变技术的能量回馈装置研究

结合高频PWM整流逆变电路高功率因数、低谐波特性,提出了一种可实现再生能量回馈利用的装置。文中介绍了该装置的主电路拓扑结构和工作原理,并根据它的等效电路和功率平衡关系建立了数学模型。从实现单位功率因数有源逆变控制出发,设计了双闭环直接电流控制系统,利用Ziegler-Nichols整定算法得到内外环PI调节器的参数。通过Matlab/Simulink仿真表明,方案设计合理,控制系统有良好的动静态性能。     

交直传动相控电力机车过电压保护参数的合理匹配

交直电力机车分别在牵引绕组和整流器元件设置阻容吸收电路以降低操作过电压和换流过电压，探讨了二者在整流器工作过程中的相互作用与影响，当参数选配不当，会造成二极管关断损坏和晶闸管开通损坏，阻容器件也会出现烧损故障；指出当前运用机车普遍存在绕组阻容参数失配情况，以致晶闸管故障率高，阻容器件烧损严重，提出满足各种机车过压保护的优化调整方案。