arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2604.03497cs.ROcs.AIcs.CV

Sim2Real-AD:一种模块化的仿真到现实框架,用于在现实世界自动驾驶中部署基于VLM的强化学习

Sim2Real-AD: A Modular Sim-to-Real Framework for Deploying VLM-Guided Reinforcement Learning in Real-World Autonomous Driving

Department of Civil and Environmental Engineering, University of Wisconsin-Madison(威斯康星大学麦迪逊分校土木与环境工程系);Google(谷歌)

Zilin Huang, Zhengyang Wan, Zihao Sheng, Boyue Wang, Junwei You, Sikai Chen

AI总结:

本文提出Sim2Real-AD框架,实现无需真实世界强化学习数据将CARLA训练的VLM引导强化学习策略零样本迁移到全尺寸车辆。框架包含几何观察桥、物理感知动作映射、两阶段渐进训练和实时部署流水线。

摘要:

将仿真中训练的强化学习策略部署到真实自动驾驶车辆仍是一个基本挑战,尤其是对于基于VLM的强化学习框架,其策略通常使用仿真原生观测和耦合动作语义,这些在物理平台上不可用。本文提出了Sim2Real-AD,一种模块化框架,用于零样本将CARLA训练的VLM引导强化学习策略迁移到全尺寸车辆,无需任何真实世界强化学习数据。该框架将迁移问题分解为四个组成部分:几何观察桥(GOB)将单目前视图像转换为仿真兼容的鸟瞰图(BEV)观测;物理感知动作映射(PAM)将策略输出转换为平台无关的物理命令;两阶段渐进训练(TPT)策略通过分离动作空间和观测空间迁移来稳定适应;实时部署流水线(RDP)整合感知、策略推理、控制转换和安全监控以实现闭环执行。仿真实验表明,该框架在不同奖励范式下保持了代表性强化学习算法的相对性能顺序,并验证了每个模块的贡献。零样本部署在全尺寸福特E-Transit上,实现了在车距保持、障碍物避让和停止标志交互场景中的成功率为90%、80%和75%。据我们所知,本研究是首次在无任何真实世界强化学习数据的情况下展示CARLA训练的VLM引导强化学习策略在全尺寸真实车辆上的零样本闭环部署。演示视频和代码可在:https://zilin-huang.github.io/Sim2Real-AD-website/。

英文摘要:

Vision-language-model (VLM)-guided reinforcement learning (RL) has recently attracted significant attention for it, replacing brittle hand-crafted rewards with semantically grounded signals; however, deploying such simulation-trained policies on real vehicles remains a fundamental challenge, because they rely on simulator-native observations and simulator-coupled action semantics with no counterpart on physical hardware. We identify a general principle: the simulation-to-reality gap decomposes into two largely orthogonal axes, a sensing-and-dynamics domain gap and a task-and-geometry gap, the former closable without real-world policy training by re-projecting real perception and control onto the policy's training manifold. We formalize this as a transfer guarantee that bounds the deployment gap by three independently controllable error terms, and instantiate it as Sim2Real-AD, which combines a Geometric Observation Bridge, a Physics-Aware Action Mapping, a Two-Phase Progressive Training curriculum, and a Real-time Deployment Pipeline. As a proof of concept, a CARLA-trained VLM-guided RL policy is transferred zero-shot to a full-scale battery-electric Ford E-Transit van in Madison, WI, USA, and drives across car-following, obstacle-avoidance, and stop-sign scenarios using no real-world training data. To our knowledge, this is among the first zero-shot closed-loop deployments of a CARLA-trained VLM-guided RL policy on a full-scale real vehicle, and the decomposition offers a principled, broadly applicable route for moving simulation-trained, foundation-model-guided policies into the physical world, supporting energy-efficient intelligent driving on electrified transportation platforms. The demo video, code, and model checkpoint are available at: https://zilin-huang.github.io/Sim2Real-AD-website/.

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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