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arXiv 2005.07127eess.SYcs.SY
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自主电动赛车的最小竞赛时间规划策略

Minimum Race-Time Planning-Strategy for an Autonomous Electric Racecar

Thomas Herrmann, Francesco Passigato, Johannes Betz, Markus Lienkamp

摘要:

对自动驾驶乘用车的日益关注也引起了人们对自动驾驶赛车系列的兴趣。正因为如此,Roborace和Indy Autonomous Challenge等平台目前正在发展。电动赛车面临着电池内存储能量有限的挑战。此外,全电动动力系统对比赛性能的影响至关重要。当热应力过大时,动力系统部件可能会发生严重损坏。在这项工作中,我们提出了一个比赛时间最小控制策略推导出的最优控制问题(OCP),被转录成一个非线性问题(NLP)。它的优化变量源于驾驶动力学以及电动动力系统的理论描述。我们推导出必要的一阶常微分方程(ODE),并形成简化的损失模型的数值优化内的实施。的显着影响的动力系统的行为上的比赛策略。

英文摘要:

Increasing attention to autonomous passenger vehicles has also attracted interest in an autonomous racing series. Because of this, platforms such as Roborace and the Indy Autonomous Challenge are currently evolving. Electric racecars face the challenge of a limited amount of stored energy within their batteries. Furthermore, the thermodynamical influence of an all-electric powertrain on the race performance is crucial. Severe damage can occur to the powertrain components when thermally overstressed. In this work we present a race-time minimal control strategy deduced from an Optimal Control Problem (OCP) that is transcribed into a Nonlinear Problem (NLP). Its optimization variables stem from the driving dynamics as well as from a thermodynamical description of the electric powertrain. We deduce the necessary first-order Ordinary Differential Equations (ODE)s and form simplified loss models for the implementation within the numerical optimization. The significant influence of the powertrain behavior on the race strategy is shown.

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