Ensuring functional safety in human-robot interaction is challenging because AI perception is inherently probabilistic, whereas industrial standards require deterministic behavior. We present an LLM-guided safety agent for edge robotics, built on an ISO-compliant low-latency perception-compute-control architecture. Our method translates natural-language safety regulations into executable predicates and deploys them through a redundant heterogeneous edge runtime. For fault-tolerant closed-loop execution under edge constraints, we adopt a symmetric dual-modular redundancy design with parallel independent execution for low-latency perception, computation, and control. We prototype the system on a dual-RK3588 platform and evaluate it in representative human-robot interaction scenarios. The results demonstrate a practical edge implementation path toward ISO 13849 Category 3 and PL d using cost-effective hardware, supporting practical deployment of safety-critical embodied AI.
@article{arxiv.2604.20193,
title = {LLM-Guided Safety Agent for Edge Robotics with an ISO-Compliant Perception-Compute-Control Architecture},
author = {Xu Huang and Ruofan Zhang and Lu Cheng and Yuefeng Song and Xu Huang and Huayu Zhang and Sheng Yin and Anyang Liang and Chen Qian and Yin Zhou and Xiaoyun Yuan and Yuan Cheng},
journal= {arXiv preprint arXiv:2604.20193},
year = {2026}
}