用神经过程+物理先验实现赛车实时安全避障
Neural Process-Based Reactive Controller for Autonomous Racing
- 基于注意力神经过程构建反应式控制器,融合物理先验提升预测精度
- 在仿真赛车环境中实现高速竞速,碰撞约束满足率接近100%
- 适合对实时性与安全性要求高的自动驾驶控制场景
基于注意力的神经架构已成为实时非线性控制领域的核心方法。随着这些数据驱动模型逐步应用于日益关键的安全领域,确保统计上有依据且可证明的安全决策变得至关重要。本文提出一种基于注意力神经过程(AttNP)及其物理信息扩展(PI-AttNP)的间隙导航反应式控制框架。两者在模拟的F1TENTH风格阿克曼转向赛车环境中进行评估,该环境作为高动态自动驾驶场景的快速代理。PI-AttNP通过引入近似模型先验注入物理归纳偏置,实现更快收敛和更优预测精度,适用于实时控制。为进一步保障安全,本文推导并实现了基于控制屏障函数(CBF)的过滤机制,可解析地强制执行碰撞避免约束。该CBF形式与学习到的AttNP控制器完全兼容,并在多种竞速场景中具有泛化能力,提供轻量级且可验证的安全层。结果表明,在保证实时约束满足的同时,闭环性能具有竞争力。
原文摘要 · Abstract (English)
Attention-based neural architectures have become central to state-of-the-art methods in real-time nonlinear control. As these data-driven models continue to be integrated into increasingly safety-critical domains, ensuring statistically grounded and provably safe decision-making becomes essential. This paper introduces a novel reactive control framework for gap-based navigation using the Attentive Neural Process (AttNP) and a physics-informed extension, the PI-AttNP. Both models are evaluated in a simulated F1TENTH-style Ackermann steering racecar environment, chosen as a fast-paced proxy for safety-critical autonomous driving scenarios. The PI-AttNP augments the AttNP architecture with approximate model-based priors to inject physical inductive bias, enabling faster convergence and improved prediction accuracy suited for real-time control. To further ensure safety, we derive and implement a control barrier function (CBF)-based filtering mechanism that analytically enforces collision avoidance constraints. This CBF formulation is fully compatible with the learned AttNP controller and generalizes across a wide range of racing scenarios, providing a lightweight and certifiable safety layer. Our results demonstrate competitive closed-loop performance while ensuring real-time constraint satisfaction.
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