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首页> 外文期刊>Journal of rail transport planning & man >Using operational data to estimate the running resistance of trains. Estimation of the resistance in a set of Norwegian tunnels
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Using operational data to estimate the running resistance of trains. Estimation of the resistance in a set of Norwegian tunnels

机译：使用运行数据估算列车的行驶阻力。估算挪威隧道中的阻力

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摘要

Two approaches to estimate the running resistance from operational data have been studied: A direct approach based on a measured/estimated acceleration to obtain a resistance time-series, and a velocity-fitting approach based on fitting a predicted to a measured velocity time-series. Two data sets have been considered: The first consists of a velocity time-series, extracted from the train event recorder. The second is logged from the vehicle control unit and includes a time-series of energy consumption and velocity. Velocity-fitting has been shown to be more robust with respect to the data resolution and is the recommended approach. The inclusion of energy consumption (or traction) data is recommended, resulting in more precise estimates. The approach is considered feasible in terms of data storage and transfer requirements, allowing a routinely collection of data from trains in operation. The additional tunnel resistance has been evaluated for a set of 10 tunnels in Norway, giving resistance coefficients ranging from 2.4 to 16.0 kg/m for tunnels with an aerodynamic cross section of 87 to 27 m~2 respectively. The comparison to a set of predictions showed that there is a large spread in the predicted additional tunnel resistance. This demonstrates that the choice of prediction method and corresponding coefficients must be taken carefully.
机译：已经研究了两种从运行数据估算运行阻力的方法：一种基于测得/估算的加速度以获得阻力时间序列的直接方法，以及一种基于将预测值拟合到测得的速度时间序列的速度拟合方法。 。已经考虑了两个数据集：第一个数据集是一个从火车事件记录器中提取的速度时间序列。第二个是从车辆控制单元记录下来的，包括能源消耗和速度的时间序列。速度拟合已显示出相对于数据分辨率更稳健的方法，这是推荐的方法。建议包括能源消耗（或牵引力）数据，以实现更精确的估计。就数据存储和传输要求而言，该方法被认为是可行的，从而允许常规地从运行中的列车收集数据。在挪威，对一组10条隧道的附加​​隧道阻力进行了评估，空气动力学横截面为87至27 m〜2的隧道的阻力系数范围为2.4至16.0 kg / m。与一组预测的比较表明，预测的附加隧道电阻存在较大的差异。这表明必须谨慎选择预测方法和相应的系数。

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