用拓扑特征构建可解释的安全区域,提升机器人导航的可靠性与透明度。
Safe and Efficient Social Navigation through Explainable Safety Regions Based on Topological Features
- 基于拓扑数据分析,通过可解释的特征区分安全与危险行为。
- 定义安全区域 $S_\varepsilon$,在最大分类误差 $\varepsilon$ 内避免碰撞。
- 适用于需高安全性与可解释性的智能机器人导航场景。
人工智能在机器人领域的应用推动了自主系统在复杂社交环境中的适应能力发展。安全高效的社交导航是关键挑战,要求AI不仅避免碰撞和死锁,还需与环境进行直观且可预测的交互。基于概率模型和保真安全区域生成的方法已展现出良好效果,主要依赖分类方法与显式规则描述无碰撞条件。本文拓展此视角,研究拓扑特征如何促进社交导航中可解释安全区域的构建,实现对不同仿真行为的分类与表征。不依赖行为参数生成安全区域,而是通过拓扑数据分析,首先利用全局规则分类提供可解释的行为刻画,依据拓扑性质区分安全与非安全场景;随后定义安全区域 $S_\varepsilon$,表示在拓扑特征空间中以最大分类误差 $\varepsilon$ 避免碰撞的区域。该区域通过可调的SVM分类器与顺序统计构造,确保鲁棒且可扩展的决策边界。方法先分离有无碰撞的仿真,优于未融合拓扑特征的基线;进一步优化以确保无死锁,并整合两者形成符合规范的仿真空间,保障安全高效导航。
原文摘要 · Abstract (English)
The recent adoption of artificial intelligence in robotics has driven the development of algorithms that enable autonomous systems to adapt to complex social environments. In particular, safe and efficient social navigation is a key challenge, requiring AI not only to avoid collisions and deadlocks but also to interact intuitively and predictably with its surroundings. Methods based on probabilistic models and the generation of conformal safety regions have shown promising results in defining safety regions with a controlled margin of error, primarily relying on classification approaches and explicit rules to describe collision-free navigation conditions. This work extends the existing perspective by investigating how topological features can contribute to the creation of explainable safety regions in social navigation scenarios, enabling the classification and characterization of different simulation behaviors. Rather than relying on behaviors parameters to generate safety regions, we leverage topological features through topological data analysis. We first utilize global rule-based classification to provide interpretable characterizations of different simulation behaviors, distinguishing between safe and unsafe scenarios based on topological properties. Next, we define safety regions, $S_\varepsilon$, representing zones in the topological feature space where collisions are avoided with a maximum classification error of $\varepsilon$. These regions are constructed using adjustable SVM classifiers and order statistics, ensuring a robust and scalable decision boundary. Our approach initially separates simulations with and without collisions, outperforming methods that not incorporate topological features. We further refine safety regions to ensure deadlock-free simulations and integrate both aspects to define a compliant simulation space that guarantees safe and efficient navigation.
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