H 2 / H ∞ $$ {H}_2/{H}_{\infty } $$ Control of AETSCP-Based IT-2 Fuzzy Networked Control Systems Under Stealthy Dos Attacks and Actuator Faults

Abstract

This paper examines the dynamic output feedback $H_2/H_{\infty }$ control of interval type-2 (IT-2) fuzzy systems suffering from stealthy denial of service (DoS) attacks under the adaptive event-triggered stochastic communication protocol (AETSCP). Considering the advantages of the AET mechanism and the SCP, a new AETSCP is proposed, whose trigger parameters can be dynamically adjusted based on the changing trend of the system state and the stealthy DoS attack probability. The signal-to-interference plus noise ratio (SINR)-based DoS attacker continuously senses the channel and utilizes the trigger characteristics of the AET mechanism to cleverly launch the attack to ensure its stealthiness. A dynamic quantizer is employed to quantize the measured output, and a time-varying fault matrix is adopted to represent actuator faults. By applying the mode-dependent Lyapunov function, the sufficient condition to ensure the stability of the considered networked control system (NCS) is derived, and the dynamic output feedback controller satisfying the $H_2/H_{\infty }$ performance is designed. Lastly, a simulation example is used to verify the effectiveness of the proposed algorithm.