Leader‐following consensus of multiple uncertain Euler–Lagrange systems under denial‐of‐service attacks

Abstract

In this thesis, we investigate a novel problem of security performance and consensus of multiple uncertain Euler-Lagrange systems (ELSs) under denial-of-service (DoS) attacks. First, we address how to make the system still function properly when the communication channel is cut off with intermittent DOS attacks by means of an event-triggered mechanism. At the same time, due to the uncertainty of the system there, we introduce an exosystem to generate signals so that the global information can be observed normally by distributed observers. Then, ELSs can be consensus while still ensuring its security. Furthermore, on the basis of this adaptive distributed observer functioning in the system, the problem for multiple ELSs of leader-following consensus is solved by using the Lyapunov method and the deterministic equivalence principle.Finally, numerical simulations are carried out to demonstrate the effectiveness of the proposed strategies. K E Y W O R D Sdenial-of-service (DoS) attacks, event-triggered, leader-following consensus, multiple Euler-Lagrange systems (ELSs), sampled-data-based

Resilient event‐triggered fault‐tolerant optimization for Euler–Lagrange plants with intermittent communication and asynchronous DoS attacks

“…However, these works are all focused on linear systems and cannot be used to deal with DoS attacks on Euler‐Lagrange (EL) models. For networked EL systems, Li et al 10 solved the distributed elastic collaborative control problem under DoS attacks and the Reference 18 investigated the security performance and consensus of uncertain EL dynamics with DoS attacks, while the optimal behaviors are not achieved. For optimization problems, the distributed elastic initialization free Jacobi descent algorithm was designed to achieve constrained optimization with DoS attacks 19 .…”

Event-triggered consensus control for a class of uncertain multiple Euler-Lagrange systems with actuator faults

“…Although all the nonlinear dynamic matrices are unknown in [27,13,16,5,24,8,20,26], external disturbance is excluded therein. In [28,17,11,9,2,19], the external disturbance is considered, but the dynamic matrices are required to be partially known in [17] or have known nominal parts in [19], while those in other literature must be parametrically separable. 2 ○ More measurements of the leader are required for control design.…”

“…Actuator faults will introduce extra nonlinearity and uncertainties, and hence bring new essential obstacles in the control design. However, most of the works [34,27,13,16,5,24,8,20,26,28,17,11,9,2,19,4,33] in this topic ignore the presence of actuator faults. Although few works consider actuator faults [3,21,32], the results are constrained ecause the time derivatives of the leader's outputs are required to be available for feedback in [3,21,32], while system parameters are partially known in [21], and the unknown system matrices must be parametrically separable in [21,32].…”