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arXiv 2202.06303math.OCcs.SYeess.SY
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基于凸优化的训练节能控制模型的精确性

On the Exactness of an Energy-efficient Train Control model based on Convex Optimization

Shaofeng Lu, Minling Feng, Kunpeng Wu

摘要:

对基于凸优化的节能训练控制模型进行了正确性证明。精确性证明表明,该凸优化模型与进行凸松弛的初始模型具有相同的优化结果。我们首先展示了如何松弛的初始非凸模型进行,并提供分析,以表明松弛是凸约束,因此放松的模型是凸模型。随后,我们证明了松弛凸模型在初始等式约束下总是能得到最优解,并且通过凸优化得到的最优解与通过初始非凸模型得到的最优解相同,并且所采用的松弛是精确的。以一个典型的大坡度城市轨道交通系统为例进行了数值验证。本文的研究结果揭示了凸优化在节能训练控制和低碳交通系统运行控制相关领域的进一步应用。

英文摘要:

In this paper, we demonstrate the exactness proof for the energy-efficient train control (EETC) model based on convex optimization. The proof of exactness shows that the convex optimization model will share the same optimization results with the initial model on which the convex relaxations are conducted. We first show how the relaxation on the initial non-convex model is conducted and provide analysis to show that the relaxations are convex constraints and the relaxed model is thus a convex model. Subsequently, we prove that the relaxed convex model will always achieve its optimal solution on the initial equality constraints and the optimal solution achieved by convex optimization will be the same as the one obtained by the initial non-convex model and the relaxations applied are exact. A numerical verification has been conducted based on a typical urban rail system with a steep gradient. The results of this paper shed lights on further applications of convex optimization on energy-efficient train control and relevant areas related to operation and control of low-carbon transportation systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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