Towards distinguishing between faults and cyber-attacks in the networked control system

Abstract

The Generalized Predictive Controller (GPC) is a preferred controller implementation method in the Networked Control System (NCS). This paper proposes an Intelligent Generalized Predictive Controller (IGPC) as an enhancement for the standard GPC. The IGPC is designed along with an internal detection and distinguishing mechanism for cyberattacks and faults; this one is based on the comparison between the true control variable and the estimated control variable for normal plant model and for faulty or perturbed plant conditions by a specific computation algorithm. The test result of the proposed method shows that it can be significantly used for detection of the cyber-attack.