Event-triggered secure control of discrete systems under cyber-attacks using an observer-based sliding mode strategy

This paper is concentrated on the event-triggered adaptive sliding mode control (SMC) issue for a class of discrete uncertain nonlinear systems subject to false data injection attack (FDIA). The considered control input undergoes the loss of effectiveness (LE) and FDIA in a unified framework. Furthermore, in order to cater the engineering reality, the event-triggered mechanism is introduced in the sensor to observer (S-O) channel and observer to controller (O-C) channel with hope to reduce the communication load. By introducing a novel scheme, sufficient conditions are provided to ensure the asymptotic stability of resultant sliding mode dynamics with prescribed H1 performance. Subsequently, to reduce the communication burden, an optimal strategy is proposed which can guarantee the stability simultaneously through choosing suitable weighting matrices. Moreover, a projection-based adaptive SMC law is designed to compensate the effects caused by the LE and FDIA, which can force the system state to be attracted into the pre-defined sliding manifold. Finally, some comparison simulations are presented to illustrate the validity of the provided control method. (C) 2021 Elsevier Inc. All rights reserved.

Automated summary

This paper focuses on the event-triggered adaptive sliding mode control issue for a class of discrete uncertain nonlinear systems subject to false data injection attack. By introducing an event-triggered mechanism and an optimal strategy, the paper provides sufficient conditions to ensure system stability and performance, and designs an adaptive sliding mode control law to compensate for the effects caused by the attack.