Mixed Time-/Event-triggered Sampling Strategies for Linear Systems under Denial-of-Service Attacks

This paper investigates the design of sampling strategies for linear networked control systems (NCSs) under dual-channel denial-of-service (DoS) attacks. We focus on enhancing system stability and communication efficiency by combining periodic and event-triggered sampling strategies. First, an ACK-based method is used to detect DoS attacks, and a mixed sampling strategy is proposed to conserve communication resources and improve DoS resilience. A dynamic quantizer module is then incorporated into the system, with suitable dynamic quantizer designed for scenarios involving quantization error. Global asymptotic stability(GAS) conditions are derived for both scenarios, and MATLAB simulations are conducted to validate the proposed methods.