arXiv:2508.10634cs.ROcs.SY2025-08被引 2

用深度神经网络与自适应控制融合,让重型机器人更安全可靠地运行。

Synthesis of Deep Neural Networks with Safe Robust Adaptive Control for Reliable Operation of Wheeled Mobile Robots

  • 分层控制:主控用神经网络,故障时自动切换到无模型鲁棒自适应控制。
  • 实测6000公斤机器人在干扰下仍保持稳定,系统性能达标。
  • 适合对安全性要求高的工业移动机器人场景,无需建模也能用。

深度神经网络(DNN)可在不依赖动力学建模的情况下实现高精度控制并保持低计算成本。然而,这类黑箱方法在重载轮式移动机器人(WMRs)上的部署仍面临挑战,因其需满足严格国际标准且易受故障与扰动影响。本文设计了一种针对重载WMRs的分层控制策略,由两级安全层监控,权限不同。主控策略采用训练好的DNN,在正常工况下提供高精度控制;当外部扰动导致系统性能低于预设阈值时,低层级安全层将关闭主控,启用无模型鲁棒适应控制(RAC),以维持系统稳定并平衡鲁棒性与响应性之间的权衡。无论使用何种控制策略,高层安全层持续监测运行状态,仅在扰动严重到无法补偿、继续运行将危及系统或环境时才触发停机。该DNN与RAC协同机制保证了整个WMR系统的统一指数稳定性,并在一定程度上符合安全标准。通过搭载主动悬架转向架(串联-并联驱动链结构)的6000公斤级实车实验验证了方法的有效性。

原文摘要 · Abstract (English)

Deep neural networks (DNNs) can enable precise control while maintaining low computational costs by circumventing the need for dynamic modeling. However, the deployment of such black-box approaches remains challenging for heavy-duty wheeled mobile robots (WMRs), which are subject to strict international standards and prone to faults and disturbances. We designed a hierarchical control policy for heavy-duty WMRs, monitored by two safety layers with differing levels of authority. To this end, a DNN policy was trained and deployed as the primary control strategy, providing high-precision performance under nominal operating conditions. When external disturbances arise and reach a level of intensity such that the system performance falls below a predefined threshold, a low-level safety layer intervenes by deactivating the primary control policy and activating a model-free robust adaptive control (RAC) policy. This transition enables the system to continue operating while ensuring stability by effectively managing the inherent trade-off between system robustness and responsiveness. Regardless of the control policy in use, a high-level safety layer continuously monitors system performance during operation. It initiates a shutdown only when disturbances become sufficiently severe such that compensation is no longer viable and continued operation would jeopardize the system or its environment. The proposed synthesis of DNN and RAC policy guarantees uniform exponential stability of the entire WMR system while adhering to safety standards to some extent. The effectiveness of the proposed approach was further validated through real-time experiments using a 6,000 kg WMR.

机器人控制神经网络安全控制自适应控制

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