基于轻制动指令的ATO二次对标跳跃方法优化

Optimization of ATO Re-benchmarking Method Based on Light Braking Command

[目的]当全自动运行列车第一次停站对标超出开门允许的范围时,需要ATO(列车自动运行)系统自动进行重新准确对标。仅使用牵引和制动指令的传统ATO二次对标方法耗时久,单次移动的距离不能满足性能需求,会影响运营服务。对此,有必要基于轻制动指令对ATO二次对标方法进行优化。[方法]引入车辆在实际运行过程中的牵引系统及空气制动系统延时,分析了仅使用牵引指令和制动指令的传统ATO二次对标方法时单次移动距离超过了1 m的原因,基于轻制动指令对ATO二次对标方法进行优化。优化后的ATO二次对标方法通过提前施加固定级位制动,在停车过程中消除了空气制动延时的影响,使得单次移动的过程仅存在牵引系统的延时,从而缩短了单次移动的距离,满足了ATO二次对标功能的性能需求。对基于轻制动指令优化后的ATO二次对标方法的单次移动距离进行理论计算,验证该方法的可行性。[结果及结论]目前,开门授权精度范围为±0.5 m,二次对标功能必须实现小于1.0 m的列车单次移动距离,才能满足停站精度纠偏的需求。传统ATO二次对标方法中,空气制动系统响应时间和执行时间过长,致使单次移动距离超过了1.0 m,无法满足停站精度纠偏需求。理论计算表明,基于轻制动指令优化后的ATO二次对标方法可以满足列车单次移动小于1.0 m的需求。

[Objective]When the initial parking of an FAO(fully automatic operation)train in station exceeds the permitted range for door opening,the ATO(automatic train operation)system needs to re-benchmark accurately.The conventional ATO re-benchmarking method using only traction and braking commands is time-consuming,and the distance of train single movement does not meet performance requirements,affecting operational service.Therefore,it is necessary to optimize the ATO re-benchmarking method based on light braking commands.[Method]By considering the delays in the traction and air brake systems during actual train operation,the reason for train single move distance exceeding 1 m in case of the above-mentioned ATO method using only traction and braking commands is analyzed,and the ATO re-benchmarking method is optimized based on light braking commands.The optimized one applies fixed-level braking in advance,eliminates delays caused by air brake system during the parking process,making the process of a single movement involve only the traction system delay,thereby shortening the single move distance and meeting the performance requirements of the ATO re-benchmarking function.The feasibility of the optimized ATO re-benchmarking method based on light braking commands is validated through theoretical calculations of a single move distance.[Result&Conclusion]At present,the door opening authorization accuracy range is±0.5 m,and the re-benchmarking function must achieve a train single move distance of less than 1.0 m to meet the stopping accuracy correction requirements.In the conventional ATO re-benchmarking method,the longer response time and execution time of the air brake system result in single move distances exceeding 1.0 m,failing to meet the stopping accuracy correction requirements.Theoretical calculations indicate that the optimized ATO re-benchmarking method based on light braking commands can meet the requirements for a train single move distance within 1.0 m.