CSR-EHS:Integrating Decentralized Control and Real-Time Scheduling for Networked Dynamical Systems

网络动力系统遍布整个国家的基础设施。这种系统的例子见于国家电网、污水管网和国家运输系统。随着这些网络规模的增长，跨网络的弱耦合可能发展成系统范围内的干扰，其影响在大的地理区域都能感受到。因此，各国迫切需要设计出更可靠和更具成本效益的技术来管理这种联网系统。该项目通过一种自我触发的分散控制方法解决了这一需求。在这种方法中，网络子系统使用它们的当前状态信息来确定必须交换的信息的速率，以确保网络系统的正常运行。s全局L2稳定性。这些速率被视为网络上的服务质量（QoS）约束。交通。本项目利用这些QoS约束来开发用于调度网络控制系统中的消息传递的软实时算法。这项工作的新颖之处在于，由此产生的软实时控制系统为传统上在硬实时系统中看到的应用程序性能提供了保证。该项目通过与工业界合作，将自触发技术转移到私营部门，该项目使用嵌入式传感器-执行器网络来控制组合下水道溢出（CSO）事件的频率。这个CSO网络是网络化的信息物理系统的一个很好的例子。为了支持培训有资格管理这些系统的工程师，该项目正在开发一套关于网络物理系统的数学基础的讲座。

Networked dynamical systems are found throughout the national infrastructure.Examples of such systems are seen in the national power grid, wastewater networks, and the national transportation system. As these networks grow in size, weak coupling across the network can blossom into system wide disturbances whose effects are felt over large geographical regions. There is, therefore, a compelling national need to devise more robust and cost-effective techniques for managing such networked systems. This project addresses this need through a self-triggered approach to decentralized control. In this approach, network subsystems use their current state information to determine the rate at which information must be exchanged to assure the networked system?s global L2 stability. These rates are cast as quality-of-service (QoS) constraints on the network?s traffic. This project uses these QoS constraints to develop soft real-time algorithms for scheduling message passing in networked control systems. The novel aspect of this work is that the resulting soft real-time control system provides guarantees on application performance that have traditionally been seen in hard real-time systems. The project is transferring the self-triggered technology to the private sector through collaborations with industry on a project that uses embedded sensor-actuator networks to control the frequency of combined-sewer-overflow (CSO) events. This CSO network is a good example of a networked cyber-physical system. To support the training of engineers qualified to manage such systems, this project is developing a set of lectures on the mathematical foundations of cyber-physical systems.