Time and Event Driven Control Systems

传统的工业设施是通过工业计算机进行监控和控制的，其中时间驱动的操作是常态。数字控制是这种时间驱动系统的范例。这种数字控制模式使用了一个基本假设，即所有信号和系统都是定期采样的。然而，这种假设在现代工业系统中不再有效，原因有二。首先，整合新的通信和计算技术产生了一类新的系统，称为网络物理系统，其中网络协议和实时计算机算法由事件演变，并且是事件驱动的。其次，大多数现有的工业设施仍然由人类操作员通过警报监控系统进行操作。工业工厂是否可以完全自动化，而不需要操作员的干预？这就需要将报警系统与控制系统结合起来，但报警系统是事件驱动的，违反了周期性假设，主要研究目标是发展一个统一的范式，用于分析和设计混合时间和事件驱动的控制系统。由于控制、计算和通信组件之间的相互作用，以及同时包含时间和事件驱动机制，这类系统给控制工程师和设计师提出了巨大的挑战。该研究计划涵盖时间和事件驱动系统的建模，状态估计和控制设计，控制和报警系统的集成，以及研究对控制和监测目的都很重要的特性，例如稳定性，控制性能，通信和计算资源使用，故障检测精度和故障诊断能力。研究问题复杂且具有挑战性，需要大量的创新和原创性来发现有效和高效的新解决方案。由于事件驱动系统一般都是时变的、非线性的，传统的基于频域的方法不适用。该计划的方法将是在一般的时域，使用状态空间模型的连续时间过程，时间和事件驱动的操作，基于李雅普诺夫参数闭环stabilityanalysis，和优化工具的分析和设计solutions.The建议的研究计划的目标是在控制系统领域的知识进步，这是相关的电气，化学和机械工程。新奇和预期的意义包括：它将解决控制系统社区面临的主要挑战，并有希望影响理论和实践;它将为控制工程师和从业人员提供新的工具，用于分析和综合信息物理系统;最后，它将有利于加拿大工业从事技术和工业相关的研究生培训。

Traditional industrial facilities are monitored and controlled through industrial computers, in which time drivenoperations are the norm. Digital control is the paradigm for such time driven systems. This digital control paradigm uses a fundamental assumption that all signals andsystems are sampled periodically in time. However, such an assumption is no longer valid in modernindustrial systems because of two reasons. First, integrating new communication and computing technologies generates a new class of systems called cyber-physical systems, in which network protocols andreal-time computer algorithms evolve by events, and are event driven. Second, most existing industrial facilities are still operated by human operators through alarm monitoring systems. Could industrial plants be fully automated, without theintervention of operators at all? This would require incorporating alarm systems with controlsystems; but alarm systems are event driven, violating the periodicity assumption.The main research objective is to develop aunified paradigm for analysis and design of hybrid time and event driven control systems. Such systems present tremendous challenges for control engineers and designersbecause of the interactions among control, computation, and communication components, and inclusion of bothtime and event driven mechanism. The proposed research program covers modeling, state estimation, and control design of time and event driven systems, integration of control and alarm systems, and studying theproperties of importance to both control and monitoring purposes, such as stability, control performance, communication and computing resource usage, fault detection accuracy,and fault diagnosis capabilities.The research problems are complex and challenging, requiring a great deal of innovation and originality touncover new solutions which are effective and efficient. Since event driven systems are in general time-varying and nonlinear, traditional frequency-domain based methods are not applicable. Theplanned approach would be in general time-domain, using state-space models for continuous-time processes,time based equations for time and event driven operations, Lyapunov based argument for closed-loop stabilityanalysis, and optimization tools for analysis and design solutions.The proposed research program targets knowledge advance in the field of Control Systems which is relevant toelectrical, chemical, and mechanical Engineering. The novelty and expected significance include: It would address major challenges facing the control systems community, and hopefully impact both the theory andpractice; it would provide control engineers and practitioners with new tools for analysis and synthesis ofcyber-physical systems; finally, it would benefit Canadian industry by engaging in technology- and industry-relevant research student training.