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arXiv 2207.04418cs.RO
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基于组合推理的自动驾驶时空运动规划

Spatiotemporal motion planning with combinatorial reasoning for autonomous driving

fortiss GmbH(福蒂斯有限公司);Technische Universität München(慕尼黑工业大学)

Klemens Esterle, Patrick Hart, Julian Bernhard, Alois Knoll

摘要:

城市环境中的运动规划可以看作是一个组合问题。通过前面、后面、右边或左边的障碍物,自动驾驶汽车可以选择执行多个选项。在规划框架中需要考虑到这些组合方面。我们解决这个问题,提出了一种新的规划方法,结合轨迹规划和机动推理。我们定义了一个分类的动态障碍物沿参考曲线,使我们能够提取战术决策序列。我们将纵向和横向运动分开,以加快基于优化的轨迹规划。为了将获得的轨迹集映射到机动变体,我们定义了一种语义语言来描述它们。这使我们能够选择最佳轨迹,同时也确保机动一致性。我们展示了我们的方法的能力,仍然被广泛认为是具有挑战性的情况。

英文摘要:

Motion planning for urban environments with numerous moving agents can be viewed as a combinatorial problem. With passing an obstacle before, after, right or left, there are multiple options an autonomous vehicle could choose to execute. These combinatorial aspects need to be taken into account in the planning framework. We address this problem by proposing a novel planning approach that combines trajectory planning and maneuver reasoning. We define a classification for dynamic obstacles along a reference curve that allows us to extract tactical decision sequences. We separate longitudinal and lateral movement to speed up the optimization-based trajectory planning. To map the set of obtained trajectories to maneuver variants, we define a semantic language to describe them. This allows us to choose an optimal trajectory while also ensuring maneuver consistency over time. We demonstrate the capabilities of our approach for a scenario that is still widely considered to be challenging.

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