High-speed rail is a key player in people's mobility thanks to its speed and high safety standards. These high safety standards are supported by extensive maintenance (of both rolling stock and track) that applies the latest nondestructive and monitoring techniques. In that context, this work presents the enhanced graphical representation of state configurations (EGRSC) and enhanced chromogram of bands of frequency (ECBF) methods, which are the evolution of the graphical representation of State configurations and chromogram of bands of frequency techniques. A clearer nomenclature is defined for the configuration states of the EGRSC. The ECBF introduces a new variable threshold that allows discarding frequency regions with small power variations and a new color palette. These methods are used in the vibratory study of an in-service high-speed train to identify the operating condition of the train. To conduct that task, a set of accelerometers is installed on the axle box of a trailer axle of the train. Accelerometers are oriented into the three space directions: longitudinal, lateral, and vertical. Vibration signals are taken during the normal operation of the train and transmitted to and stored on a remote database. Vibration measures are collected before and after a major maintenance operation. The application of EGRSC and ECBF allows collecting information from thousands of vibration signals and to display that information intuitively and understandably. The analysis of EGRSC and ECBF results allows identifying several frequency regions with significant spectral power variations that are common to the three vibration directions studied. These patterns should be taken as a reference for future maintenance actions. Any unexpected behavior of these frequency regions would indicate the presence of a fault.

中文翻译：

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应用于高速列车的色谱光谱技术的增强

由于其速度和安全标准高，高铁成为人们出行的关键参与者。这些高安全标准得到应用最新无损和监测技术的广泛维护（机车车辆和轨道）的支持。在这种情况下，这项工作提出了状态配置的增强图形表示 (EGRSC) 和频带的增强色谱 (ECBF) 方法，它们是状态配置图形表示和频带色谱技术的演变。为 EGRSC 的配置状态定义了更清晰的命名法。ECBF 引入了一个新的可变阈值，允许丢弃具有小功率变化和新调色板的频率区域。这些方法用于在役高速列车的振动研究，以识别列车的运行状况。为了执行该任务，在火车拖车轴的轴箱上安装了一组加速度计。加速度计面向三个空间方向：纵向、横向和垂直。在列车正常运行期间获取振动信号并将其传输并存储在远程数据库中。在主要维护操作之前和之后收集振动测量。EGRSC 和 ECBF 的应用允许从数以千计的振动信号中收集信息，并直观、易懂地显示这些信息。对 EGRSC 和 ECBF 结果的分析允许识别具有显着频谱功率变化的几个频率区域，这些变化对于所研究的三个振动方向是常见的。这些模式应作为未来维护操作的参考。这些频率区域的任何意外行为都表明存在故障。