城市轨道交通车辆基地信号机设置方案分析

通过对深圳已建城市轨道交通车辆基地信号机设置方案进行分析比较,总结出了2种常用信号机设置方案的特点,并对车辆基地出入段/场能力进行估算,提出了车辆基地信号机设置方案建议。     

基于险情判断的车辆行驶记录仪设计

针对目前车辆行驶记录仪存在的存储数据量大，无效数据过多的问题，基于险情判断设计了一种使用ARM处理器的车辆行驶记录仪。该系统在记录过程中对所USB接口摄像机所采集到的视频按时间段截取，并使用方向盘转角数据和制动减速度数据来判断是否有险隋发生，挑选保存有险}青发生时间段内的视频，从而能减少系统的存储空间并实现对有效数据的...     

发展电动汽车应有利于推动环保和清洁能源

今天的电动汽车还只是疑似环保,在大力推广电动车辆的同时,我国电网还须大力提高绿色能源的比例;为有效解决和完善蓄电池生产、储运、管理和回收的污染,须将更多的资源投入蓄电池各环节的环保措施和新能源的研究。     

电动汽车组合仪表开发

介绍电动汽车组合仪表的一些基本知识，用开发实例来说明电动汽车组合仪表上必须显示的最基本的信息。     

塑料电镀在汽车中的应用及发展

塑料电镀以其外观漂亮、耐腐蚀性高、耐磨性好、容易加工成型及质量轻等优点,越来越多地受到各汽车公司设计师的青睐,并广泛用于汽车内饰、外饰、电子零部件以及发动机舱零部件上.文章详细分析了市场上常见的各种镀层缺陷和失效原因,同时介绍了三价铬电镀、无铬粗化工艺、替代环保工艺以及复合涂镀层的研究方向.     

Consumer preferences for alternative fuel vehicles: A discrete choice analysis

This paper analyzes the potential demand for privately used alternative fuel vehicles using German stated preference discrete choice data. By applying a mixed logit model, we find that the most sensitive group for the adoption of alternative fuel vehicles embraces younger, well-educated, and environmentally aware car buyers, who have the possibility to plug-in their car at home, and undertake numerous urban trips. Moreover, many households are willing to pay considerable amounts for greater fuel economy and emission reduction, improved driving range and charging infrastructure, as well as for enjoying vehicle tax exemptions and free parking or bus lane access. The scenario results suggest that conventional vehicles will maintain their dominance in the market. Finally, an increase in the battery electric vehicles’ range to a level comparable with all other vehicles has the same impact as a multiple measures policy intervention package.     

Heavy-duty vehicle modelling and longitudinal control

This paper addresses modelling, longitudinal control design and implementation for heavy-duty vehicles (HDVs). The challenging problems here are: (a) an HDV is mass dominant with low power to mass ratio; (b) They possess large actuator delay and actuator saturation. To reduce model mismatch, it is necessary to obtain a nonlinear model which is as simple as the control design method can handle and as complicated as necessary to capture the intrinsic vehicle dynamics. A second order nonlinear vehicle body dynamical model is adopted, which is feedback linearizable. Beside the vehicle dynamics, other main dynamical components along the power-train and drive-train are also modelled, which include turbocharged diesel engine, torque converter, transmission, transmission retarder, pneumatic brake and tyre. The braking system is the most challenging part for control design, which contains three parts: Jake (engine compression) brake, air brake and transmission retarder. The modelling for each is provided. The use of engine braking effect is new complementary to Jake (compression) brake for longitudinal control, which is united with Jake brake in modelling. The control structure can be divided into upper level and lower level. Upper level control uses sliding mode control to generate the desired torque from the desired vehicle acceleration. Lower level control is divided into two branches: (a) engine control: from positive desired torque to desired fuel rate (engine control) using a static engine mapping which basically captures the intrinsic dynamic performance of the turbo-charged diesel engine; (b) brake control: from desired negative torque to generate Jake brake cylinder number to be activated and ON/OFF time periods, applied pneumatic brake pressure and applied voltage of transmission retarder. Test results are also reported.     

铁路车辆通过曲线时的最小半径研究

通过对车辆在曲线上的运行特征的分析,从车辆自身通过最小曲线半径、抗倾覆能力的最小曲线半径、满足旅客列车最高运行速度要求的最小曲线半径、满足旅客舒适度与内外轨均磨条件要求的最小曲线半径等因素,建立平曲线最小曲线半径与车辆运行特征间的对应关系;从车辆连挂车钩最小曲线半径、工程允许曲线半径、限坡当量竖曲线最小曲线半径、车辆结构限界要求的最小曲线半径、行车平稳性及舒适度要求的最小曲线半径等建立竖曲线最小曲线半径与车辆运行特征间的对应关系;运用相关的参数,对站线曲线半径标准的选择,进行计算与分析;为站线曲线半径标准及道岔标准的选择,提供系统理论根据,为新一轮《线规》及《站规》与工程具体设计,提供系统理论支持。     

基于场景识别的电动汽车唤醒、休眠策略设计

为合理应用车载低压电能,文章设计了基于应用场景识别的一体化分层唤醒、休眠控制的策略。根据KL30下整车有效唤醒状态按需唤醒电控单元,并引入用车场景预测、提前唤醒电控单元,解决电控单元按需唤醒下用车场景快速切换带来的响应延迟问题;同时,通过场景识别进一步排查无法休眠的电控单元,进行防低压亏电控制。文章应用CANOE?工具仿真了用户遥控解充电枪锁操作及充电口单元无法休眠工况,结果表明,所提出的控制策略能够提高解充电枪锁响应速度,并能够识别出无法休眠电控单元进行防亏电控制。