Output-based Event-triggered Mechanism Research Articles

Output-based event-triggered consensus of general linear multi-agent systems with communication delay under directed graphs

This paper studies the output-based event-triggered consensus problem of general linear multi-agent systems with communication delay under directed communication graphs. The influence of time delay on performance of multi-agent systems is investigated : the stability margin of time delay is explicitly calculated to measure the capability of proposed control algorithm to tolerate the time delay. By the designed output-based event-triggered mechanism, both communication among agents and update of controller are intermittent without Zeno behavior. Consequently, this control mechanism prolongs the lifespan of multi-agent systems in the sense that it saves intensive resource for communication and update of controller. Finally, numerical simulations are given to demonstrate the correctness of results in this paper.

Output-Based Event-Triggered Predictive Control for Networked Control Systems

In this article, the output-based predictive control problem for networked control systems (NCSs) with communication delays is investigated by utilizing the event-triggered mechanism (ETM). First, the output-based ETM is introduced in order to save limited network resources effectively. Second, the system states are estimated from the received output measurements by the Luenberger observer. Third, the model-based networked predictive control (NPC) approach is developed to actively deal with the time delay and stabilize the system. Moreover, two different approaches including the augmented model and the piecewise linear model are adopted, and sufficient conditions that guarantee the closed-loop stability and performance are further provided, respectively. Finally, two simulation examples are given to demonstrate the effectiveness and applicability of the proposed methods for the addressed NCSs.

Event-Triggered Global Robust Output Regulation for a Class of Nonlinear Systems

This note studies the global robust output regulation problem for a class of nonlinear systems by an output-based event-triggered control law. First, we convert the problem into the event-triggered global robust stabilization problem of a well-defined augmented system based on the internal model approach. Then, we design an output-based event-triggered control law together with an output-based event-triggered mechanism to solve the stabilization problem, which in turn leads to the solution to the original problem by an output-based event-triggered control law. Finally, we illustrate our approach by an example.

Event-triggered cooperative robust practical output regulation for a class of linear multi-agent systems

In this paper, we consider the event-triggered cooperative robust practical output regulation problem for a class of linear minimum-phase multi-agent systems. We first convert our problem into the cooperative robust practical stabilization problem of a well defined augmented system based on the distributed internal model approach. Then, we design a distributed event-triggered output feedback control law together with a distributed output-based event-triggered mechanism to stabilize the augmented system, which leads to the solvability of the cooperative robust practical output regulation problem of the original plant. Our distributed control law can be directly implemented in a digital platform provided that the distributed triggering mechanism can monitor the continuous-time output information from neighboring agents.

Global Robust Output Regulation for a Class of Nonlinear Systems via Event-Triggered Control

In this paper, we study the event-triggered global robust output regulation problem for a class of nonlinear systems in output feedback form with unity relative degree. We first convert the problem into the event-triggered global robust stabilization problem of a well defined augmented system by the internal model approach. Then, we solve the stabilization problem by an output-based event-triggered control law together with an output-based event-triggered mechanism. Finally, the theoretical result is applied to the Lorenz systems.