ISCAD - Design, Control and Car Integration of a 48 Volt High Performance Drive

Through its new technology the ISCAD system provides up to 300 kW with a safe-to-touch 48 Volt battery.This results in a high-performance drive that is intrinsically electrically safe.The novel machine design requires new concepts for power electronics,control systems,and integration strategies.Further degrees of freedom yield to challenges and even more important to possibilities for all kinds of applications.The innovation of the design will be explained and adjustments for power electronics and control will be worked out.The focus of this paper is the 3rd generation of Intelligent Stator Cage Drive(ISCAD)prototypes.This first integrated and compact prototype has been used to re-equip a Geely Emgrand EV.The entire system and the mentioned process are described in detail.In addition,the in-house designed 48 V battery is highlighted.Simulations and measurements give an overall demonstration of the potential and the current status of the drive.

Integration Possibility of Urban Public Bus System and Cable Car in Maribor

Combination of a bus system and cable car system can reduce the overall congestion of traffic in urban areas, where surrounding hills or mountains hold larger settlements or tourist and recreational infrastructure. With this kind of integration number of individual car trips can be significantly reduced. In this paper, the authors present an analysis of the pilot project implementation, which was held in Maribor. The authors conducted a limited test trial of two means of transportation, combining them into a single operating transport offer for inhabitants and tourists. Combined transport option proved to be a good starting point for reduction of traffic and parking congestion during winter tourist season and beyond. Method used in the research, in order to gain actual potential of integrating two systems and improving public transport offer, was establishment and implementation of the pilot project in Maribor during January 2011. Data was gathered through interviews of two interest groups. The first covered the users who were brought to the foothills of Pohorje＇s ski center by bus. The second covered the cable car users that were traveling to the top of Pohorje. For a limited time period, a trial principle of a single ticket was established, which gave ski-pass holders free bus ride on bus line No. 6. With the aim of reducing CO2, test drives of hybrid bus and compressed natural gas bus were conducted alongside many promotional activities with which users were informed of importance of environmentally friendly mobility options.

Fatigue research of metro car body based on operational loads

Purpose–The principle of infinite life design currently directs fatigue resistance strategies for metro car bodies.However,this principle might not fully account for the dynamic influence of operational loads and the inevitable presence of defects.This study aims to integrate methods of service life estimation and residual life assessment,which are based on operational loads,into the existing infinite life verification framework to further ensure the operational safety of subway trains.Design/methodology/approach–Operational loads and fatigue loading spectra were determined through the field test.The material test was conducted to investigate characteristics of the fracture toughness and the crack growth rate.The fatigue strength of the metro car body was first verified using the finite element method and Moore–Kommers–Japer diagrams.The service life was then estimated by applying the Miner rule and high-cycle fatigue curves in a modified form of the Basquin equation.Finally,the residual life was assessed utilizing a fracture assessment diagram and a fitted curve of crack growth rate adhered to the Paris formula.Findings–Neither the maximum utilization factor nor the cumulative damage exceeds the threshold value of 1.0,the metro car body could meet the design life requirement of 30 years or 6.6 million km.However,three out of five fatigue key points were significantly influenced by the operational loads,which indicates that a single fatigue strength verification cannot achieve the infinite life design objective of the metro car body.For a projected design life of 30 years,the tolerance depth is 12.2 mm,which can underscore a relatively robust damage tolerance capability.Originality/value–The influence of operational loads on fatigue life was presented by the discrepancy analysis between fatigue strength verification results and service life estimation results.The fracture properties of butt-welded joints were tested and used for the damage tolerance assessment.The damage tolerance life can be effectively related by a newly developed equation in this study.It can be a valuable tool to provide the theoretical guidance and technical support for the structural improvements and maintenance decisions of the metro car body.

基于CaR风险测度下的保险投资决择

用CaR测度保险公司的整体性风险,讨论了在可接受风险水平限制下,保险公司如何选择最大化终期财富的投资策略的问题.利用最优化原理,得到保险公司的最优投资策略和有效边界的显式表达式,接着分析了最优投资策略和有效边界在保费、索赔量以及索赔风险影响下的动态性质,最后用实际数据对保险公司如何选择最优投资策略进行了模拟.

中观交通仿真模型INTEGRATION及其案例应用

交通仿真模型可以分为宏观、中观、微观三类,中观交通仿真模型是一种能够兼顾宏观与微观模型优点的交通流动态仿真模型。国内对宏观、微观交通仿真模型已有很多研究,但是对于中观交通仿真模型的研究还很少。根据中观交通仿真模型INTEGRATION的模块构成及功能特点,将其应用于道路交通中,并结合实例加以分析,对于推动国内中观交通仿真模型的研究及国内路网规划的逐步完善具有重要的理论和实践意义。

“双碳”战略和新工科背景下多学科交叉人才培养与Chem-E-Car竞赛的融合实践

“双碳”重大战略背景下,高校应根据新工科发展要求,加快培养“双碳”领域工程科技人才。文章基于新工科人才培养理念,从培养实践创新能力、扩展学生培养途径、完善竞赛培训体系和建设指导教师队伍4个方“双碳”人才培养模式,培养一批优秀的具有国际化视野的“双碳”人才。

A Map-Matching Algorithm forGPS/DR Integrated Navigation Systems Basedon Dempster-Shafer Evidence Reasoning

GPS (Global Positioning System) has been widely used in car navigation systems. Most car navigation systems estimate the car position from GPS and DR (dead reckoning). However, the unknown GPS noise characteristic and the unbounded DR accumulation of errors over time make the position information with undesirable position errors. The map matching can improve the position accuracy and availability of the vehicular position system. In this paper, general principle of map matching is investigated according to segmentation and feature extraction, and a map matching algorithm based on D-S (Dempster-Shafer) evidence reasoning for GPS integrated navigation system is proposed, which can find the exact road on which a car moves. For the experiments, a car navigation system is developed with some sensors and the field test demonstrates the effectiveness and applicability of the algorithm for the car location and navigation.

KTH整合护理干预在造血干细胞移植联合CAR-T治疗复发难治B细胞淋巴瘤病人中的应用

目的:探索KTH整合护理干预在造血干细胞移植联合CAR-T治疗复发难治B细胞淋巴瘤病人中的应用效果。方法:采取便利抽样法,选择2021年1月—2022年1月90例复发难治B细胞淋巴瘤病人作为研究对象。按照时间顺序分配为对照组和试验组,每组45例。对照组采用常规护理;试验组在常规护理基础上,加入KTH整合护理。比较两组心理状态(焦虑、抑郁、心理弹性)、生活质量及自我效能。结果:两组病人在干预前均有轻等程度的焦虑抑郁,且心理弹性较低,心理状态评分比较差异均无统计学意义;在干预后,两组病人的心理状态均得到调整,试验组的心理状态优于对照组(P<0.05)。两组病人干预前生活质量各维度评分比较差异无统计学意义;在干预后,各维度得分均有提高,其中躯体功能、心理功能、社会功能的变化试验组优于对照组差异均有统计学意义(P<0.05),生活环境变化差异无统计学意义(P>0.05)。两组病人干预前自我效能感各维度及总分评估结果比较,差异无统计学意义,干预后自我效能的各维度得分均有提高,试验组提高水平较对照组高(P<0.05)。结论:KTH整合护理干预在造血干细胞移植联合CAR-T治疗复发难治B细胞淋巴瘤病人中的应用效果较好,可以提高病人的心理功能及自我效能,利于改善生活质量。

针对FSAC赛场环境的全局锥桶建图算法研究

针对中国大学生无人驾驶方程式(FSAC)赛车在高速循迹的“U型弯道”工况中,由于识别的锥桶有限,导致路径规划失效的问题,提出了一种基于激光雷达以及组合惯导系统的锥桶地图构建算法。该算法从当前帧激光点云中提取出锥桶中心点云,通过乘以雷达到组合惯导的标定矩阵和组合惯导实时解算的车辆在地图坐标系中的位姿矩阵,将激光坐标系下的锥桶点云投影到地图坐标系下,完成锥桶地图的构建与更新。将算法进行实车验证,3次实验结果表明:该算法的平均召回率为98.7%,平均精准度为98.1%,构建好的地图能够供给规划算法,拟合出赛道的全局最优路径进行加速跟踪,提高了赛车的感知预判能力和路径规划效率。

北京地铁智慧车辆段方案研究

地铁车辆段是地铁列车的停放、日常保养、检修基地,同时还具备车辆救援、办公综合、材料供应等重要功能。当地铁列车结束运营或出现特殊状况时,都会返回车辆段进行“体检”或“治疗”,为安全运营做充分准备。随着北京地铁的高速发展,为应对不断增长的列车数量和客流量,车辆段的运维检修、调度运行、生产管控压力持续增大。本文在分析传统地铁车辆段运营现状的基础上,介绍了地铁智慧车辆段的定义与业务功能。结合北京地铁智慧车辆段建设需求,以车辆运维和设备维护为核心,开展北京地铁智慧车辆段方案的顶层需求分析,研究面向生产调度、检修维护和综合管控的车辆段智慧化提升技术,在保证车辆段安全稳定运营的前提下,提出了涵盖调度运行智能化、运维检修信息化、综合管控数字化的智慧车辆段方案,既能降低运维成本能提高运维管理效率,建立可推广、可复制的车辆段建设管理模式,可促进运维水平持续提升,助力“智慧城轨”建设再上新台阶。

Research on Interdisciplinary Project-Based Teaching in Primary Schools Catalyzed by Digital Intelligence Empowerment

With the rapid development of information technology,digital intelligence empowerment has gradually become an important direction of educational innovation.This paper uses the case analysis method to explore in depth how digital intelligence empowerment and project-based teaching can promote the integration of primary school curricula.Taking the teaching of intelligent patrol cars as an example,this paper analyses the positive role of digital intelligence empowerment in improving teaching effectiveness and cultivating students’comprehensive ability.The research results show that digital intelligence empowerment not only enriches teaching resources but also optimizes the teaching process.Combined with project-based teaching methods,it can effectively improve students’interest in learning and performance.This study provides a useful reference and inspiration for the project-based teaching of curriculum integration in primary schools and has certain practical significance and theoretical value for promoting the process of educational informatization.

高速铁路联调联试中车辆系统规范化管理策略研究

高速铁路联调联试涉及众多环节和复杂技术,其中车辆系统承担着关键职责,如车辆性能检测、故障排查等,因此车辆系统的规范化管理至关重要。为实现车辆系统在高速铁路联调联试过程中规范化管理,确保调试过程的高效性、安全性与系统性,通过深入分析联调联试的现状、车辆系统的具体职责和当前面临的问题,从前期准备、测试过程、数据分析以及问题整改等多方面提出一系列提升车辆系统联调联试规范化水平的策略与建议。通过这些策略与建议,能有效提升车辆系统在联调联试过程中的规范化管理水平,提高效率和质量,保障高速铁路联调联试的顺利进行,为后续的正式运营奠定坚实基础,推动我国高速铁路事业的持续发展。

西安汽车“两业融合”发展对策研究——基于上海汽车集团股份有限公司的经验启示

汽车产业作为西安六大支柱产业之一,是西安工业稳增长的主引擎,也是“两业融合”的重要领域。上海汽车集团股份有限公司(以下简称“上汽集团”)作为国家服务型制造示范企业,在“两业融合”方面拥有丰富的经验,通过分析上汽集团的经验做法,提出西安应在加强技术攻关、布局全产业链、重视人才储备等方面进一步推进汽车产业“两业融合”。

光储充一体化实训平台研制与应用

为模拟光储充一体化系统的工作流程和故障状态,参照实际光储充一体化系统工程项目开发了光储充一体化实训平台。介绍了该平台的技术方案、结构组成、可进行的实训项目。实践结果表明,该平台能够使学员在实际场景中学习和掌握光储充发电技术,并能独立完成多次检修、维护、故障处理等培训,达到快速提升学员技能水平的目的。

智能网联汽车专业课程思政融通逻辑与路径研究

在智能网联汽车《地理信息采集与编辑》课程思政的融合路径中,不同的融合方式具有不同的适用情境和实施前提。智能网联汽车专业课程融通的过程中,教师应该灵活运用不同的融合方式,结合具体情境,选用最适合的融合方式进行课程设计和实施。以“能力价值担当创新发展”为价值逻辑,把融通路径总结为“融字诀”,通过创新教学手段、探究新知识新技能,激发学生学习兴趣和动力,引导学生跨越学科界限,形成系统的思维方式和综合地运用能力。

车务段安全生产指挥中心管理系统设计

为提高车务站段运输生产组织、安全卡控和应急处置的能力,开发了车务段安全生产指挥中心管理系统。该系统依托数据共享平台,接入并整合了铁路既有信息系统的调度命令、列车运行图、现车、编组等数据资源,提供多源调度命令电子化集中管理和闭环控制、车流分析与预警、保留列车全过程安全管理、编组作业安全监督、现场安全检查规范化管控及应急文件管理等应用功能。该系统采用易于扩展和维护的软件设计,支持多项功能灵活配置,提供站场作业可视化实时监控界面,自动推送业务处理提醒和预警信息,为车务段安全生产指挥中心提供强有力的生产组织、作业控制与安全监督手段。该系统的应用将显著提升车务段安全生产指挥中心信息化管理水平,有助于指挥中心高效率、高质量地完成各项工作,促进铁路站段运输组织、安全卡控整体效能的提升。

铸铝一体化车门的多目标可靠性优化设计

为提升车门的轻量化水平与性能,采用“材料—结构—性能”一体化集成方法设计铸铝一体化车门。基于构建的铸铝一体化车门有限元模型,以车门的厚度为设计变量,采用径向基函数(radial basis function,RBF)神经网络近似模型和二阶响应面近似模型并分别结合二代非支配排序遗传算法(non-dominated sorting genetic algorithm-Ⅱ,NSGA-Ⅱ)、多目标粒子群优化(multi-objective particle swarm optimization,MOPSO)算法以及多岛遗传算法(multi-island genetic algorithm,MIGA)对车门的下沉刚度工况位移、上扭转刚度工况位移、下扭转刚度工况位移、一阶弯曲模态频率、一阶扭转模态频率和质量进行确定性优化设计。在此基础上,考虑材料及加工制造等不确定性因素,对确定性优化解的质量水平进行6Sigma可靠性分析与优化。结果表明,二阶响应面近似模型与MOPSO算法的优化组合方案实现了车门的最佳轻量化,RBF神经网络近似模型与MOPSO算法的优化组合方案实现了车门下沉刚度工况位移的最小化。上述2种组合分别实现了车门轻量化与安全化的设计目标。研究结果可为车身零部件的优化设计提供参考。

大型国有铸造企业立体储芯系统的构建与实践

分析了铸钢件自动化铸造造型生产线中应用于铁路货车重要受力承载的中大型复杂结构件(摇枕、侧架、车钩钩体等)产品整体砂芯的自动化立体储芯系统的存储与运输情况,确定了整体砂芯自动化立体储芯系统的方案设计、作业流程与物流节拍。构建的自动化立体储芯系统,实现了整体砂芯的自动化存取,连接了整体砂芯射芯线与自动化铸造造型生产线,协调了各种产品整体砂芯的供需平衡,保障了自动化铸造造型生产线的高效运行,提高了生产效率,降低了生产成本,提升了铸造造型生产车间的自动化水平。

基于SOA的整车企业技术数据集成研究

针对整车企业信息化程度越来越高,但是信息孤岛现象也越来越严重的问题,提出了基于SOA(Service Oriented Architecture)的整车企业跨系统技术数据查询和实时报表的系统设计和实施框架,通过技术方案、用例、类图等详细分析了系统的构架和实施策略.案例研究表明,该系统具有很强的可操作性.

电驱动乘用车制动能量回收技术发展现状与展望

制动能量回收技术能大幅提高整车能量经济性,已成为电驱动车辆的一项关键技术和核心竞争力的重要因素之一。本文中总结了电驱动乘用车制动能量回收系统的组成与分类,综述了国内外电驱动乘用车制动能量回收系统产品研发的最新进展,分别从液压执行机构、系统控制和系统评价3个方面对制动能量回收系统的关键技术进行分析,最后对制动能量回收技术的发展趋势进行了展望。