Cyber Attack Detection and Mitigation Through System Identification

In this paper, conventional controllers, PI and PID are used to counter various types of cyber-attacks such as Gain attack and Man-in-the-middle (MITM) or deception attack. In this ARX estimator is used to estimate new plant dynamics. This ARX estimator is invoked by an attack detector, which works on safety band theory. The overall plant dynamics obtained by ARX estimator is used to compute conventional controllers gains for compensator. This new compensator will mitigate the after effects of cyber-attacks on the plant and makes the plant to operate normally. The validation of the proposed approach is carried out on the servo system and simulated in MATLAB-SIMULINK environment.