Distributed Optimization, Estimation, and Control of Networked Systems through Event-triggered Message Passing

通过事件触发消息传递对网络系统进行分布式优化、估计和控制

• 批准号: 0925229
• 负责人: Michael Lemmon
• 金额: $ 29.89万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-10-15 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0925229&HistoricalAwards=false
• 关键词: Distributed; Optimization; Estimation; Control; Networked

The objective of this program is to develop event-triggered methods for message passing in the optimization, estimation, and control of networked dynamical systems. Prior work has demonstrated experimentally that event-triggering can greatly reduce communication usage while maintaining high levels of networked system performance. The main goal of this project is to develop formalisms that better explain the reason for these benefits and to develop a more systematic approach to designing event-triggered networked systems. The project's intellectual merit is that event-triggering provides a solid theoretical basis for the discretization of networks of dynamical systems. This basis is based upon the simple idea that messages between subsystems should only exchanged when there is novel information relevant to theperformance of the overall system. This event-triggered approach therefore has subsystems transmit information when some internal measure of that information's novelty exceeds a time-varying and state-dependent threshold. The design of these thresholds is accomplished by enforcing stability concepts (such as input-to-state stability or input-output stability) subject to constraints on the frequency with which information can be passed within the overall system. The transformative nature of this approach lies in its potential to provide a systematic approach to the discretization of systems in a manner that goes well beyond conventional Nyquist sampling. The project's impact will be broadened through interactions with industrial partners EmNet LLC and Odyssian LLC. EmNet LLC is interested in using event-triggered message passing on the CSOnet system, a wireless sensor-actuator network being used to control the frequency of combined seweroverflow (CSO) events. Odyssian LLC is interested in using event-triggered methods for the intelligent control of event-triggered microgrids. The project's impact will also be broadened through interactionswith middle school students interested in robotic systems. The project's impacts will be broadened further through interactions with European researchers.

该项目的目标是开发事件触发的方法，用于网络动力系统的优化、估计和控制中的消息传递。 先前的工作已经通过实验证明，事件触发可以大大减少通信使用量，同时保持高水平的网络系统性能。 该项目的主要目标是开发形式体系，更好地解释这些好处的原因，并开发一种更系统的方法来设计事件触发的网络系统。该项目的智力优势在于事件触发为动力系统网络的离散化提供了坚实的理论基础。 这个基础基于这样一个简单的想法：只有当存在与整个系统的性能相关的新信息时，子系统之间的消息才应该交换。 因此，当信息新颖性的某些内部测量超过时变且与状态相关的阈值时，这种事件触发方法使子系统传输信息。 这些阈值的设计是通过强制稳定性概念（例如输入状态稳定性或输入输出稳定性）来完成的，但受到整个系统内信息传递频率的限制。 这种方法的变革性本质在于它有可能以远远超出传统奈奎斯特采样的方式提供系统离散化的系统方法。 通过与工业合作伙伴 EmNet LLC 和 Odyssian LLC 的互动，该项目的影响力将得到扩大。 EmNet LLC 有兴趣在 CSOnet 系统上使用事件触发消息传递，这是一个无线传感器执行器网络，用于控制组合下水道溢出 (CSO) 事件的频率。 Odyssian LLC 有兴趣使用事件触发方法对事件触发微电网进行智能控制。 通过与对机器人系统感兴趣的中学生的互动，该项目的影响也将扩大。 通过与欧洲研究人员的互动，该项目的影响将进一步扩大。