This paper presents an overview of the networked supervisory control frameworks for discrete event systems with imperfect communication networks, which are divided into the centralized setup, the decentralized setup and the distributed setup. The state-of-the-art works on networked supervisory control of discrete-event systems addressing the channel imperfections that are caused by channel delays, data losses or non-FIFO channels are discussed. By presenting the key concepts and main results of each representative work, we analyze the pros and cons of different approaches. Finally, we also provide a summary of the existing works, which roughly follow two different lines of thinking and result in two different verification or synthesis approaches. The first approach utilizes simple, non-networked plant models but relies on the development of sophisticated concepts of network controllability and observability to capture network imperfections, while the second approach embeds relatively complex yet verifiable channel models into the model of the networked plant and adopts the standard concepts of controllability and observability for the (verification and) synthesis of networked supervisors. Some future research topics are also presented.

本文概述了具有不完善通信网络的离散事件系统的网络化监督控制框架，分为集中式、分散式和分布式。讨论了离散事件系统的网络监督控制的最先进工作，解决了由通道延迟、数据丢失或非 FIFO 通道引起的通道缺陷。通过介绍每个代表性工作的关键概念和主要结果，我们分析了不同方法的优缺点。最后，我们还提供了对现有工作的总结，这些工作大致遵循两种不同的思路，并导致两种不同的验证或综合方法。第一种方法使用简单的，非联网工厂模型，但依赖于复杂的网络可控性和可观察性概念的发展来捕获网络缺陷，而第二种方法将相对复杂但可验证的信道模型嵌入到联网工厂模型中，并采用可控性和可观察性的标准概念用于（验证和）网络监管者的综合。还介绍了一些未来的研究课题。