基于检测数据的应答器动态特性影响因素分析

Analysis of Factors Influencing Balise Dynamic Transmission Performance Based on Dynamic Detection Data

为定量评估外界因素对高速铁路应答器传输系统动态特性的影响,结合应答器动态检测数据,基于统计理论知识方法进行关键影响因素分析。针对应答器传输系统作用过程,建立动态特性评估指标;并基于某线路历史检测数据,采用方差分析与统计值分析相结合的方法,分析速度、轨道板类型、地面应答器安装方式等因素对传输系统动态特性指标的影响。结果表明:(1)列车速度会影响车载BTM接收性能和动态作用距离,对上行链路信号特性无明显影响;(2)不同轨道板工况不会影响应答器上行链路信号特性,但CRTSⅡ型轨道板工况条件下应答器报文数据接收性能更强;(3)应答器动态作用距离在纵向安装条件下比横向安装平均大7~10cm,且不会因车体振动导致上行链路信号特性和抗干扰性能发生异变。

In order to quantitatively evaluate the influence of external factors on the dynamic characteristics of balise transmission system of high-speed railway,key influencing factors are analyzed with the balise transmission system dynamic testing data based on the statistical theory knowledge method.According to the process of balise transmission system,the evaluation index of dynamic characteristics is established.Based on the historical detection data of a certain line,the influences of speed,type of track slab,ground balise installation mode and other factors on the dynamic characteristics of transmission system are analyzed by means of variance analysis and statistical value analysis.The results show that:(1)the train speed will affect the receiving performance and dynamic operating distance of the on-board BTM,but has no obvious effect on the up-link signal characteristics;(2)different track slab conditions will not affect the up-link signal characteristics of balise transmission system,but the transmitted telegram receiving performance of balise is better under the condition of type Ⅱ track board;(3)the dynamic operating distance of balise transmission system under the longitudinal installation condition is longer than that of the horizontal one by 7~10 cm in average,and the up-link signal characteristics and antiinterference performance will not change due to the vehicle body vibration.