Fixed-Time Event-Triggered Output Consensus Tracking of High-Order Multiagent Systems Under Directed Interaction Graphs

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This article investigates the fast finite‐time exact tracking problem for nonlinear systems with time‐varying disturbances. A new composite controller with a finite‐time disturbance observer is proposed to achieve fast finite‐time exact tracking. Furthermore, a new time‐varying barrier power integrator technique is developed to design the controller. This can ensure not only asymmetric/symmetric time‐varying full‐state constraints but also singular‐free continuous control effort. To reduce the complexity of computation, fuzzy logic systems are adopted to approximate complex nonlinearities. Finally, an example of single‐link robot systems subject to time‐varying disturbances is presented to show the validity of the proposed method.

Section: Fast Finite‐time Controller Design For Symmetric Time‐varyin...mentioning

confidence: 99%

Constrained fast finite‐time exact tracking for disturbed nonlinear systems

Chen

Zheng

Ahn

et al. 2022

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“…Thus an ETS can effectively save network resources and reduce the transmission pressure while ensuring the corresponding system performance. In recent years, numerous research studies have been focused on ETS, such as state feedback control, [18][19][20] output feedback control, [21][22][23] filtering [24][25][26][27] and so on. However, only the errors between the most currently triggered data and the newly sampling data are used in the triggering condition of mentioned references above.…”

Section: Introductionmentioning

confidence: 99%

Resilient and event‐triggered control of stochastic jump systems under deception and denial of service attacks

Chai

Shi

et al. 2022

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This article investigates the resilient and event‐triggered control problem of stochastic jump systems subject to randomly occurring denial of service (DoS) attacks and deception attacks. First, a novel resilient and memory event‐triggered scheme (RMETS) is proposed. The influence caused by DoS attacks is characterized as an uncertainty of the triggering condition. Under the RMETS, the desired security performance of the system and limited network resources can be well balanced while stochastic deception and DoS attacks occur. Second, by using the Lyapunov theory and the linear matrix inequality method, the resilient controller and the proposed RMETS are co‐designed. Sufficient conditions are established to ensure the security performance under the two types of attacks. Finally, numerical and practical examples are rendered to illustrate the effectiveness of the developed approach.

“…Finite time stabilization problem has attracted increasing attention in the past few years. Finite time stabilization means that by designing a proper feedback controller, all the states of the closed loop systems will become exact zero after finite time 1‐5 . However, for asymptotic stabilization, the states will converge to zero in an infinite time.…”

Section: Introductionmentioning

confidence: 99%

Logic‐based switching finite‐time stabilization with applications in mechatronic systems

Zheng

Wang

Chen

et al. 2022

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This paper investigates the finite time stabilization problem for a class of nonlinear systems with unknown control directions and unstructured uncertainties.The unstructured uncertainties indicate that not only the parameters but also the structure of the system nonlinearities are uncertain. A new adaptive control method is proposed for the considered system. Logic-based switching rule is utilized to tune the controller parameters online to stabilize the system in finite time. Different from the existing adaptive controllers for structured/parametric uncertainties, a new switching barrier Lyapunov method and supervisory functions are introduced to overcome the obstacles caused by unstructured uncertainties and unknown control directions. Both simulations and experiments are conducted on mechatronic systems to verify the effectiveness of the proposed methods.