An Algorithm for Braking Curve Calculations in ERTMS Train Protection Systems
An Algorithm for Braking Curve Calculations in ERTMS Train Protection Systems
复制标题
ERTMS 列车保护系统制动曲线计算算法
DOI：
10.2495/cr060421
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
B. Friman
中科院分区：
文献类型：
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作者：
B. Friman
本文介绍了欧洲铁路运输管理系统（ERTMS）的列车保护标准，欧洲列车控制系统（ETCS），包括几个先进的功能，预测安全速度从一些目标位置的列车。制动系统可以在不同的速度段中具有不同的制动能力。列车前方的区域可以包含许多具有不同目标和释放速度的目标。它前面的区域也根据梯度以独立于目标的方式进行分割。因此，应输入到制动曲线算法的变量具有三个维度。由于应计算允许速度，而不是干预时间，因此计算需要平方根，这需要一些计算能力。本文提出了一种算法，其中梯度和目标组合在一个表中。这使得输入可变区域为二维而不是三维，这简化了计算并减少了平方根计算的必要次数。
This paper describes how the European Railroad Transportation Management Systems (ERTMS) standard for train protection, European Train Control System (ETCS), includes several advanced features for predicting safe speed from a number of target locations ahead of the train. The braking system can have a different braking capability in different speed segments. The area in front of the train can contain a number of targets with different target and release speeds. The area in front of it is also segmented according to the gradients, in a way which is independent of the targets. The variables that shall be input to the braking curve algorithm therefore have three dimensions. Since permitted speed shall be calculated, rather than time to intervention, square roots are needed for the calculations, which require some computational power. The article suggests an algorithm where the gradients and the targets are combined in one table. This makes the input variable area two-dimensional instead of three-dimensional, which simplifies calculations and reduces the necessary number of square root calculations.