城市轨道交通系统运行仿真平台的设计与实现

为研究不同客流状况下轨道交通的运行效率和应急方案效率评估,以及突发事件下应急策略的仿真和定量分析,提出了一种城市轨道交通运行仿真平台。该系统从列车运动模型、自动列车控制(ATC)系统结构模型、轨旁设备对象功能模型和移动闭塞系统模型等4个方面对城市轨道交通运行仿真系统进行建模。在此基础上,以VC++作为开发平台,结合计算机网络以及数据库技术,设计并实现了完整的地铁运行仿真平台。在时刻表的驱动下,仿真平台可以实现列车的自动运行。该系统以轨道交通8号线数据进行验证,仿真结果与真实时刻表达一致。     

车轮踏面参数检测系统的误差分析

针对车轮踏面参数检测系统的车轮轴线与回转中心的偏心、传感器测量方向不通过回转中心、传感器测量方向与测量面呈交角和车轮轴线与回转中心倾斜等误差因素,建立车轮踏面参数检测系统的误差因素影响模型,分析比较了各误差因素对车轮踏面参数测量值的影响。利用Pro/E软件建立LMA型标准车轮的三维几何模型,并设置模拟采样参数和进行切面采样,通过MATLAB软件对采样数据进行仿真分析。结果表明,仿真结果与设定值一致。     

用并行遗传算法解列车控制问题

遗传算法是一种全局优化的数值计算方法,它存在自然并行性。给出一种解列车控制问题的并行遗传算法,并讨论算法中一些技术问题。     

高速列车旅客信息系统咨询子系统的研究

本文全面介绍了高速列车旅客信息系统中的信息咨询子系统，阐述了系统目标、系统网络结构及功能设想，探讨了数据组织与管理方法和信息资源的获得与更新等内容．     

Psychological factors for driver distraction and inattention in the Australian and New Zealand rail industry

A signal passed at danger (SPAD) event occurs when a train moves past a stop signal into a section of unauthorised track. SPAD events are frequently attributed to driver distraction and inattention, but few studies have explored the failure mode from the perspective of task demand and the ability of the driver to self-regulate in response to competing activities. This study aimed to provide a more informed understanding of distraction, inattention and SPAD-risk in the passenger rail task. The research approach combined focus groups with a generative task designed to stimulate situational insight. Twenty-eight train drivers participated from 8 different rail operators in Australia and New Zealand. Data were analysed thematically and revealed several moderating factors for driver distraction. Time-keeping pressure and certain aspects of the driver-controller dynamic were considered to distort performance, and distractions from station dwelling and novel events increased SPAD-risk. The results are conceptualised in a succinct model of distraction linking multiple factors with mechanisms that induced the attentional shift. The commonalities and inter-dynamics of the factors revealed insight into driving anxiety in the passenger rail mode, and suggested that SPAD-risk was intensified when three or more factors converged. The paper discusses these issues in the context of misappropriated attention, taxonomic implications, and directions for future research.     

活塞膨胀对配气机构的影响

针对发动机运行过程中气门碰活塞的问题，要进行尺寸链的计算。由于活塞的工作温度变化很大，运动速度又很高，在计算中要考虑活塞膨胀对尺寸链的影响。为分析、计算和改进配气机构提供了指导。     

配气机构动态数据处理系统的研制

介绍了一种用于内燃机配气机构试验研究的高速数据采集及处理系统。该系统的要集器以发动机曲轴转角信号为采样脉冲，可精确地控制采样区间，使采样在发动机工作循环周期的指定区段进行，能满足发动机动态数据高速采样及处理的要求。同时介绍了系统具有特色的一些处理方法，包括数字滤波技术、连分式积分技术等，并结合发动机配气机的机构动态参数的测试，给出了采样及实例。     

列车经过某单线无竖井隧道时的活塞风速计算

采用非恒定流活塞风计算理论,按列车行驶在隧道中的不同位置分四种情况计算活塞风风速,并通过MATLAB软件进行数值求解,得到列车经过某区间隧道时的活塞风速度,为地铁环控系统设计中计算活塞风引起的空调能耗以及降低地铁能耗提供一定的参考。     

50#钢火车轴用步进式(一、二次)正火炉

为适应50＃钢火车轴正火工艺新要求，选用一、二次步进式正火炉，在炉型结构上采用新型耐火材料，高速烧嘴，变频调速等技术，收到满意效果。     

Vehicle-induced loads on traffic sign panels

The determination of the loads on traffic sign panels in the current standards does not, in general, take into account the vehicle-induced loads, as explained by Quinn, Baker and Wright (QBW in what follows) (J. Wind Eng. Ind. Aerodyn. 89 (2001) 831). On the other hand, a report from Cali and Covert (CC) (J. Wind Eng. Ind. Aerodyn. 84 (2000) 87) indicates that in highway sign support structures, vehicle-induced loads have led to premature failures in some cases. The aim of this paper is to present a mathematical model for the vehicle-induced load on a flat sign panel, simple enough to give analytical results, but able to explain the main characteristics of the phenomenon. The results of the theoretical model help to explain the behaviour observed in the experiments performed in previous studies.