Verifying the Energy-saving Effect of a Driver Advisory System using Speed Estimation for Freight Railways

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  • 運転曲線予測による貨物列車向け運転支援システムの省エネ効果検証

Abstract

<p>In this study, we have developed a driver advisory system using a speed estimation technique developed for freight railways aiming to ensure energy-saving and punctuality. The driver advisory system focuses cruising driving operation for a freight railway by maintaining the planned time of passage station. The driver advisory system proposes a recommended driving operation for each passage station.</p><p>First, we discuss an energy saving driving method called cruising driving for freight railways considering the running resistance and motor efficiency. As a result of an energy calculation, we found that is necessary to use constant-speed and saw-toothed driving operations properly depending on speed and load characteristics, including hauling mass and gradient of running line. Then, we have developed a driving operation assignment method using the speed estimation, which switches between constant-speed and saw-toothed driving operations depending on speed and load characteristics. Finally, we present a trial result focusing on energy consumption. We confirm the energy-saving effect comparing the energy consumption with or without the developed driver advisory system.</p>

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