地铁列车逻辑控制单元典型故障及优化方案研究
何虹丽1黄行1范溢峻1师满琴1付孙兵2颜健乐1
Research on Typical Faults and Optimization Solutions for Metro Train Logic Control Units
HE Hongli1HUANG Xing1FAN Yijun1SHI Manqin1FU Sunbing2YAN Jianle1
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作者信息:1.宁波市轨道交通集团有限公司运营分公司，315202，宁波
2.深圳通业科技股份有限公司，518110，深圳
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Affiliation:1.Operation Branch of Ningbo Rail Transit Group Co., Ltd., 315202, Ningbo, China
2.Shenzhen Tongye Technology Co., Ltd., 518110, Shenzhen, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2025.03.059
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中图分类号/CLCN:U231.7
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栏目/Col:应用技术
摘要:
［目的］作为继电器的替代设备，LCU（逻辑控制单元）在我国城市轨道交通列车中已广泛运用，与列车网络、硬线信号共同参与车辆控制。收集LCU运用过程中出现的典型故障进行分析并探求可靠的解决方案和措施，对地铁列车的安全性和可靠性起到至关重要的作用。［方法］针对宁波轨道交通3、4号线列车自开通以来的LCU典型故障，收集关键数据，通过监测并分析故障板卡关键点位输出波形，对故障机理进行深入分析，确定故障原因为输入输出板卡元器件失效且冗余切换机制未启动，提出优化故障检测及冗余切换机制的方案，并调整驱动芯片输出电路参数。最后结合仿真试验及装车测试，验证了优化方案的有效性。［结果及结论］LCU的双机热备冗余及故障工况主动切换机制是其优于传统继电器的重要体现，该功能的有效启用对列车的稳定运行发挥着重要作用。因此，在正常及稳压管故障工况下对该优化方案进行测试验证，优化后的LCU均能满足使用要求，证实该优化方案切实可行，提升了LCU的可用性。
Abstracts:
［Objective］ As a replacement for relays, LCUs (logic control unit) are widely used in urban rail transit trains in China, participating in vehicle control alongside train networks and hardwired signals. Analyzing typical faults encountered during LCU operation and exploring reliable solutions are crucial for ensuring the safety and reliability of metro trains. ［Method］ Focusing on typical LCU faults observed since the opening of Ningbo Rail Transit Line 3 and Line 4, and based on the collected key data, the output waveforms at critical points of the faulty boards are monitored and analyzed to investigate fault mechanisms. The identified causes include component failures on input/output boards and failures in activating the redundancy switching mechanism. Optimization proposals are formulated to enhance fault detection and redundancy switching mechanisms, and output circuit parameters of the driver chips are adjusted. Finally the effectiveness of the optimization proposal is validated through simulation experiments and onboard testing. ［Result & Conclusion］ The dual machine hot-standby redundancy and fault condition active switching mechanisms of LCUs are key advantages over conventional relays and play a critical role in ensuring stable train operation. Testing under normal and voltage regulator fault conditions confirms that the optimization proposel can effectively improve the availability of LCUs.
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