磁浮交通运行控制系统中通信子系统的分析和研究

介绍并分析了磁浮交通运行控制系统中通信子系统的功能及网络构成,就如何对关键技术进行国产化进行了研究。     

申江路高架跨越上海磁浮示范运营线的综合监护技术

上海磁浮示范运营线的安全保护区被定义为线路轨道外边线两侧各30 m范围。在磁浮保护区内进行施工作业时,应当通过涵盖施工对象及磁浮线路自身,贯穿施工前、施工期间和施工后的综合监护技术来控制其对磁浮结构及附属设施的影响。阐述了综合监护技术的主要工作内容,并以上海申江路高架跨越上海磁浮示范运营线为例,介绍了综合监护技术的工程实践过程,分析了几个关键技术及其在施工过程中的作用。研究结论可为类似工程提供参考。     

Effects of the guideway's vibrational characteristics on the dynamics of a Maglev vehicle

The levitation control system in an electromagnetically levitated vehicle controls the voltage in its winding to maintain the air gap, which is the clearance between the electromagnet and the guideway, within an allowable range of variation, while strongly interacting with the flexible guideway. Thus, the vibrational characteristics of the guideway play an important role in the dynamics of Maglev (magnetically levitated) vehicles that utilise an active electromagnetic suspension system. In this study, the effects of the guideway's vibrational characteristics, such as natural frequency and damping, on the dynamics of the Maglev vehicle UTM-02 are numerically and experimentally analysed. From these analyses, the coupled equations of motion of the simplified vehicle–guideway model with three degrees of freedom are derived. Eigenvalues are calculated and frequency response analysis is also performed, in order to obtain a clear understanding of the dynamic characteristics resulting from the guideway's vibrational characteristics. To verify the numerical results, air gap tests of the urban Maglev vehicle UTM-02 are also carried out. These results lead us to recommend that the natural frequency of the guideway be decreased by increasing mass density rather than by decreasing rigidity, and that its damping ratio be increased in the Maglev vehicle UTM-02 employing a five-state feedback control law as a levitation control law.     

磁悬浮列车信号通信系统研究

讨论了磁悬浮列车信号通信系统的构成,功能及实现方法,针对磁悬浮列车的特点,分析了整个系统的信号流向,着重叙述了车内设备和地面设备间的数据交换方法,提出几种系统组成方案,通过对比,结合实践,确定了符合现阶段的方案。     

Research on the H∞ Controller Synthesis for Maglev Suspension System

The performances of a single-magnet model, which is the simplified model of Maglev suspension, are analyzed. The H∞ controller synthesized for the single-magnet model is presented. The synthesis results show that the control performance and robustness performance are satisfactory and the application of the H∞ controller to Maglev suspension is feasible and effective.     

上海磁浮列车轨道梁系统简述

磁悬浮轨道梁设计对全线运营质量和造价具有关键作用,在研究德国EmslabdS试验线主要轨道梁型的基础上,上海磁悬浮列车运营线采用钢混凝土复合梁、钢复合梁,桥上轨道梁结构等形式。设计参数满足运营安全和舒适度要求,变形要求竖向小于等于梁长的1/4800,上下温差引起的挠度小于等于梁长的1/6500,制造误差小于2mm,道岔钢梁采用箱型断面,侧向过岔最大速度为196km·h-1。目前,已经完成轨道梁和道岔的制作与铺设。     

中低速磁浮列车电磁铁滚动情况下的受力特性研究

列车在行驶过程中,由于轨道形变或列车机械结构等问题不可避免地会产生悬浮电磁铁滚动现象.采用有限元数值计算方法,利用ANSOFT软件,对中低速磁浮列车悬浮电磁铁发生滚动情况下的受力特性进行了研究.结果表明,电磁铁相对轨道发生滚动对其受力会产生重要影响,特别是列车在起浮瞬间影响会更大.     

EMS型磁浮列车悬浮力分析

悬浮系统是磁浮列车的重要组成部分,其性能将直接影响车辆的性能。悬浮力是线路桥梁设计和车辆线路动力学分析的基础。根据EMS型磁浮列车的特点,给出了悬浮系统的数学模型,分析了悬浮力的大小及其动态特性。     

轨道梁参数对磁浮车-高架桥垂向耦合动力响应的影响研究

建立磁浮车—高架桥垂向耦合模型,运用车—桥垂向耦合程序,分别探讨桥梁刚度和高架桥线路的不平顺对磁浮车—高架桥垂向动力响应的影响,分析结果表明:在相同的轨道梁抗弯刚度下,随着磁浮列车运行速度的增加,桥梁的振动响应增大,但轨道梁刚度大的桥梁振动响应比刚度小的桥梁振动响应增加幅度小一些;在相同车速下,随着轨道梁抗弯刚度的降低,桥梁振动响应增大;车辆重向振动响应在轨道抗弯刚度达3 8612×1010N·m2之前,随轨道梁抗弯刚度的增大而减小,在轨道梁抗弯刚度达3 8612×1010N·m2之后,无明显影响;线路状态对车辆的动力响应有明显影响,较差的线路状态将使高架桥挠度增大,使车体垂向振动加速度明显增大。     

美国Magplane磁悬浮列车方案

美国Magplane磁悬浮列车方案有两种,一种是速度在500km/h的超导方案,另一种是速度约250 km/h的永磁方案.与其他高速磁悬浮列车相比,美国高速磁悬浮列车方案使用了永磁悬浮,使悬浮气隙达5～15 cm,这样可以大大降低轨道土建工程施工的精度要求,并且该系统使用电磁道岔,改变了多数磁悬浮列车系统使用机械道岔,占地面积大,操作不方便的缺点,从而该方案具有造价低、原理简单、悬浮间隙大、起浮速度低的优点.文章从原理、创新、存在问题等方面对美国Magplane磁悬浮列车永磁方案进行了较详细的介绍.