In this article, we investigate the distributed resilient observer-based fault-tolerant control problem for heterogeneous linear multiagent systems in presence of actuator faults and denial-of-service (DoS) attacks. order to estimate system matrix state exosystem, novel adaptive observers are proposed. By using dwell time technique Lyapunov stability theory, observer error is shown be exponentially stable even under influence DoS Then, an algorithm proposed determine parameters with aim...

The distributed tracking problem for uncertain nonlinear multiagent systems (MASs) under event-triggered communication is an important issue. However, existing results provide solutions that can only ensure stability with bounded errors, as asymptotic difficult to be achieved mainly due the errors caused by event-triggering mechanisms and system uncertainties. In this article, aim of overcoming such difficulty, we propose a new methodology. subsystems in MASs are divided into two groups,...

This article addresses the distributed model-free adaptive control (DMFAC) problem for learning nonlinear multiagent systems (MASs) subjected to denial-of-service (DoS) attacks. An improved dynamic linearization method is proposed obtain an equivalent linear data model systems. To alleviate influence of DoS attacks, attack compensation mechanism developed. Based on and mechanism, a novel learning-based DMFAC algorithm developed resist which provides unified framework solve leaderless...

This article is concerned with the event-triggered output consensus problem for heterogeneous multiagent systems (MASs) nonuniform communication delays. Unlike existing results, more general linear MASs and delays are considered. To reduce among subsystems, novel dynamic periodic mechanisms proposed. By using signals at previous sampling instant, new distributed observers designed to eliminate asynchronous behavior caused by Based on developed observers, observer error system converted into...

In this paper, the event-triggered consensus problem of linear multiagent systems with time-varying communication delays is addressed. Different from existing results delays, more general nonuniform are considered. To avoid asynchronous phenomenon caused by a novel periodic switching controller developed. Based on controller, resulting error system can be modeled as system. Furthermore, exponential stability derived utilizing Lyapunov approach and dwell-time analysis method. Finally, an...

In this article, we investigate the consensus problem for high-order nonlinear multiagent systems (MASs) with an uncertain leader under event-triggered communication. Compared existing results MASs communication, class of considered is more general, while achieving better performance in term asymptotic tracking. To estimate unknown parameters leader, distributed intermediate parameter estimators based on communication mechanism are first introduced. guarantee that derivatives exist when...

As a cyber-physical system (CPS), the security of microgrids (MGs) is threatened by unknown faults and cyberattacks. Most existing distributed control methods for MGs are proposed based on assumption that secondary controllers generation units operate in normal conditions. However, attacks could lead to significant impact consequently influence stability MGs. In this article, resilient strategy multiple energy storage systems (ESSs) islanded deal with these hidden but lethal issues. By...

The resilient cooperative output regulation problem for a class of uncertain nonlinear multiagent systems (MASs) under denial-of-service (DoS) attacks is addressed in this article. This the first attempt to investigate MASs DoS attacks, and novel distributed control scheme consisting observer adaptive controller proposed. Specifically, form an upper triangular chain first-order low pass filters designed estimate exosystem state based on composite observability condition. Then, designed. It...

This article studies the observer-based event-triggered containment control problem for linear multiagent systems (MASs) under denial-of-service (DoS) attacks. In order to deal with situations where MASs states are unmeasurable, an improved separation method-based observer design method less conservativeness is proposed estimate states. To save communication resources and achieve objective, a novel controller based on influence of DoS attacks, which can make resilient addition, Zeno behavior...

In this article, a cooperative resilient control method for dc microgrid (MG) is proposed to dispel the adverse influences of both communication delays and denial-of-service (DoS) attacks. To avoid that sampling period captured by intelligent attackers, new time-varying period, an improved mechanism are first introduced under framework. Based on designed mechanism, secondary controller designed. It theoretically shown developed can achieve goals bus voltage restoration current sharing even...

This article discusses the prescribed performance control problem for multiagent systems involving state triggering and controller output simultaneously. To successfully apply backstepping technique in event-triggered design, virtual signal is constructed by original system state. Compared with existing results on performance, a new barrier Lyapunov function developed considering characteristics of systems, fuzzy adaptive protocol proposed procedure. It guarantees that consensus tracking...

This article addresses the resilient practical cooperative output regulation problem (RPCORP) for multiagent systems subjected to both denial-of-service (DoS) attacks and actuator faults. Fundamentally different from existing solutions RPCORPs, system parameters considered in this are unknown each agent, a novel data-driven control approach is introduced handle such an issue. The solution starts with developing distributed observers follower presence of DoS attacks. Then, communication...

Reference governors are add-on control schemes which enforce state constraints on pre-stabilized systems by modifying, whenever necessary, the reference. This paper studies design of reference for collisions-free leader-following coordination (CF-LFC) nonlinear multi-agent under unreliable communications. The "unreliability" is characterized as irregular topology switchings (e.g., due to communication failures, adversarial attacks, or other agents' blockages), will often cause large...

In this article, we consider the cooperative tracking problem for a class of nonlinear multiagent systems (MASs) with unknown dynamics under denial-of-service (DoS) attacks. To solve such problem, hierarchical resilient learning method, which involves distributed observer and decentralized controller, is introduced in article. Due to existence communication layers control architecture, it may lead delays DoS Motivated by consideration, model-free adaptive (MFAC) method developed withstand...

In this paper, we study the cooperative optimization problem (COP) for fuzzy nonlinear multi-agent systems (MASs) subjecting to denial-of-service (DoS) attacks. Unlike existing results, both and DoS attacks are considered in paper. To solve problem, a hierarchical equivalence mechanism is first introduced transform COP into an equivalent one consisting of distributed (DOP) decentralized tracking (DTP). By introducing optimal algorithm, customized virtual signal devised minimize function...

This paper studies the problem of event-triggered (ET) backstepping control with state/output triggering for nonlinear strict-feedback systems. To address issue nondifferentiability virtual controls caused by ET mechanism, a set homogeneous feedback filters are constructed to generate smooth estimates necessary differentiability, all states which state subsystem same order. Then, new coordinate transformations introduced and traditional procedure is reconstructed. Compared existing...

This article focuses on the distributed secondary control problem for energy storage systems (ESSs) under false data injection (FDI) attacks. To solve problem, a <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">k</i> -step attack estimation method is first proposed to estimate unknown attacks and error converges zero as number of steps increases infinity. Next, we design Round-Robin (RR) communication protocol alleviate burden among ESSs....

In this article, we consider the distributed fault-tolerant resilient consensus problem for heterogeneous multiagent systems (MASs) under both physical failures and network denial-of-service (DoS) attacks. Different from existing results, dynamic model of leader is unknown all followers in article. To learn influence DoS attacks, a learning algorithm proposed by using idea data-driven. Based on learned leader, estimator designed each agent to estimate states leader. Then, new adaptive...

This paper considers the distributed adaptive output feedback consensus problem for linear multiagent systems with matched nonlinear functions and actuator bias faults under directed communication topology. Fuzzy logic are used to approximate unknown functions. Unlike existing results, dimensions of input vectors considered in this may be different by exchanging order fuzzy basis weight systems. By introducing mechanisms, a controller is designed, which only depends on information from...

In this article, we investigate the distributed resilient control problem for a class of cyber-physical systems with communication delays under denial-of-service (DoS) attacks. contrast to previous DoS attacks results based on multiagent (MASs), new approach is proposed more general heterogeneous linear MASs nonuniform delays. Two types sampled-based observers are, respectively, proposed. Namely, adaptive are designed by introducing buffer mechanism eliminate behavior caused while mechanisms...