Event-Triggered Approach to Control of Nonlinear Systems

非线性系统控制的事件触发方法

• 批准号: RGPIN-2018-03722
• 负责人: Marquez, Horacio
• 金额: $ 4.01万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=658813
• 关键词: Event; Triggered; Approach; Control; Nonlinear

Control systems are typically implemented using a digital computer. In classical control, periodic control (i.e. sampling at regular intervals) is typically used. Recent research has raised important questions regarding the efficiency of periodic sampling in comparison with aperiodic solutions. Event-triggered systems have emerged as an attractive alternative to periodic sampling. ***In an event-driven system, information is exchanged between system components only when changes in the measured signals justify computing a new control action. The primary advantage of event-triggering over periodic sampling is better resource utilization by significantly reducing the rate of transfer of information between subsystems. This characteristic of event-triggered systems makes then particularly attractive in the context of Networked Control Systems (NCSs) in which the control loops are closed through a real-time (shared) network, thus limiting the amount of information that can be transmitted in real-time between system components. A second problem caused by the insertion of computer networks in control is the possibility of cyber threats which may include insider intentional threats and malicious actors. Today's threat landscape is, in fact, increasing at an alarming pace, and there is an increased urgency in protecting NCSs against cyber attacks. ***The long term objective of this research is to develop the foundations of a theory of control that can provide reliably solutions to the control of complex systems connected over a communication network. In such a theory: (i) Communication networks will be integrated seamlessly allowing communication between system components without risks (ii) Network congestion problems, delays, and packet dropouts will have minimal effect on system performance. (iii) Control systems will have integrity, i.e. will be able to detect cyber attacks and remain operational.***Our approach consists of employing efficient solutions based on event-triggered control. Event-triggered control is in its infancy and much work is still required. We will focus on the solution of classical control problems with focus of robust solutions that can operate in the presence of modelling errors, and network effects (transmission delays, limited bandwidth, packet-dropouts), a problem that remains largely unsolved.***We will also focus on secure control of nonlinear systems. Our research is aimed at exploiting the compatibility of measurements with the underlying physical process and control mechanism with the goal of providing protection against cyber attacks. *****

通常使用数字计算机实现控制系统。在经典控制中，通常使用周期控制（即定期进行抽样）。最近的研究提出了与附属解决方案相比，有关周期性采样效率的重要问题。事件触发的系统已成为定期采样的有吸引力的替代方法。 ***在事件驱动的系统中，仅当测量信号的变化证明计算新的控制措施合理时，才能在系统组件之间交换信息。事件触发而不是周期性采样的主要优点是通过显着降低子系统之间信息传输速率更好的资源利用。事件触发系统的这种特征使得在网络控制系统（NCSS）的背景下特别有吸引力，在该系统中，控制循环通过实时（共享）网络封闭，从而限制了可以在真实中传输的信息量 - 系统组件之间的时间。插入计算机网络在控制中引起的第二个问题是网络威胁的可能性，其中可能包括内部人士故意威胁和恶意演员。实际上，当今的威胁格局以令人震惊的速度增加，并且在保护NCSS免受网络攻击方面的紧迫性越来越紧迫。 ***这项研究的长期目标是开发控制理论的基础，该理论可以为通过通信网络连接的复杂系统提供可靠的解决方案。在这样的理论中：（i）通信网络将无缝集成，允许没有风险的系统组件之间的通信（ii）网络拥塞问题，延迟和数据包辍学对系统性能的影响最小。 （iii）控制系统将具有完整性，即能够检测网络攻击并保持运行。***我们的方法包括采用基于事件触发的控制的有效解决方案。事件触发的控制仍处于起步阶段，仍然需要大量工作。我们将重点关注可以在存在建模错误和网络效果（变速箱延迟，有限的带宽，数据包抛弃）的情况下运行的可靠解决方案的焦点的经典控制问题的解决方案，这一问题仍然无法解决。*** *** ***我们还将专注于对非线性系统的安全控制。我们的研究旨在利用测量值与基本的物理过程和控制机制的兼容性，目的是提供防止网络攻击的保护。 *****