自主化BTM异常引起的停车故障分析及对策措施

Analysis and Countermeasures of Train Stop Fault Due to Autonomous BTM Anomaly

作为列控车载设备的重要组成部分,BTM一旦发生故障,将会导致列车运行途中停车或不能正点发车。利用自主化BTM数据记录全面的特点,对应用过程中发生的3起典型故障案例进行分析,提出相应对策措施:优化应答器报文接收逻辑,对于已能正确解析出报文但后续无法解析的情况,自主化BTM将其作为旁瓣进行过滤,对于无法解析成830 bit的报文,解码板通过多次移位解析,提升自主化BTM报文解析成功率,只有在规定时间无法解析成功的报文,才向车载主机发送全零应答器报文,从而增强自主化BTM对于现场应用环境的适应性;利用自主化BTM重启时间非常短的特点,增加BTM重启机制,解决临时应答器传输服务不可用(BSA)、永久BSA、BTM端口无效这3类故障造成的停车。目前,应答器报文接收逻辑优化措施已在CTCS3-300T型车载设备的自主化BTM中实施,重启机制经源头设计厂家研究,车载主机可结合运行场景进行合理运用。

The balise transmission module(BTM)is an important component of onboard equipment.Any fault of the BTM will cause the midway stop or failure of on-schedule departure of trains.The corresponding countermeasures are proposed by analyzing 3 typical fault cases that occurred during applications based on the autonomous BTM’s feature of complete data recording:Optimizing the balise telegram receiving logic,for the telegram that can be correctly resolved but fails to be resolved later,it is to be filtered by the autonomous BTM as a side lobe,for the telegram that cannot be resolved into 830 bit,the decoding board is used for multiple shift resolutions to improve the telegram resolution success rate of the autonomous BTM,and the all-zero balise telegram can be sent to the onboard host only when the telegram cannot be resolved within the prescribed time,improving autonomous BTM’s adaptability to the field application environment;Considering that the autonomous BTM restart only takes a very short time,an autonomous BTM restart mechanism is added to solve the problem of train stop caused by 3 types of faults,i.e.,temporary BSA failure,permanent BSA failure and invalid BTM ports.Currently,the optimization measures of balise telegram receiving logic have been implemented in the autonomous BTM of CTCS3-300T onboard equipment.The restart mechanism has been studied by the source design manufacturer,and can be applied to onboard hosts based on operation scenes appropriately.