Time and Event Driven Control Systems

传统的工业设施是通过工业计算机进行监视和控制的，在工业计算机中，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。这种数字控制范例使用了一个基本假设，即所有信号和系统都是周期性采样的。然而，由于两个原因，这样的假设在现代工业体系中不再有效。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随着事件发展，并且是事件驱动的。其次，大多数现有的工业设施仍然由人工操作员通过报警监控系统进行操作。工业工厂能否完全自动化，完全不需要操作员的干预？这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。******主要的研究目标是为混合时间和事件驱动控制系统的分析和设计开发一个统一的范例。这样的系统对控制工程师和设计者提出了巨大的挑战，因为控制、计算和通信组件之间的相互作用，以及时间和事件驱动机制的包含。研究内容包括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都很重要的特性，如稳定性、控制性能、通信和计算资源的使用、故障检测精度和故障诊断能力。*******研究问题是复杂和具有挑战性的，需要大量的创新和独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是时变的和非线性的，传统的基于频域的方法不适用。计划中的方法将在一般的时域中，使用连续时间过程的状态空间模型，使用时间和事件驱动操作的基于时间的方程，使用基于Lyapunov的参数进行闭环稳定性分析，以及用于分析和设计解决方案的优化工具。*******提出的研究计划的目标是控制系统领域的知识进步，这与电气，化学和机械工程有关。其新颖性和预期意义包括：它将解决控制系统社区面临的主要挑战，并有望影响理论和实践；它将为控制工程师和从业者提供分析和综合网络物理系统的新工具；最后，它将通过参与技术和工业相关的研究学生培训，使加拿大工业受益

Traditional industrial facilities are monitored and controlled through industrial computers, in which time driven*operations are the norm. Digital control is the paradigm for such time driven systems. This digital control paradigm uses a fundamental assumption that all signals and*systems are sampled periodically in time. However, such an assumption is no longer valid in modern*industrial systems because of two reasons.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 and*real-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 the*intervention of operators at all? This would require incorporating alarm systems with control*systems; but alarm systems are event driven, violating the periodicity assumption.******The main research objective is to develop a*unified paradigm for analysis and design of hybrid time and event driven control systems. Such systems present tremendous challenges for control engineers and designers*because of the interactions among control, computation, and communication components, and inclusion of both*time 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 the*properties 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 to*uncover 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. The*planned 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 stability*analysis, and optimization tools for analysis and design solutions.*******The proposed research program targets knowledge advance in the field of Control Systems which is relevant to*electrical, 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 and*practice; it would provide control engineers and practitioners with new tools for analysis and synthesis of*cyber-physical systems; finally, it would benefit Canadian industry by engaging in technology- and industry-relevant research student training.***