Quantization-Dependent Dynamic Event-Triggered Control for Networked Switched Systems Under Denial-of-Service Attacks
研究了拒绝服务攻击和带宽限制下网络化切换系统的控制问题，提出了量化依赖的动态事件触发机制和动态量化器，保证系统指数稳定并节省通信资源。
This article investigates the control problem for networked switched systems under denial-of-service (DoS) attacks. The switching signal and the quantized system state are transmitted to the remote controller via a network, which suffers from bandwidth constraints and DoS attacks. To save communication resources in both time and space, a Zeno-free dynamic event-triggered mechanism (DETM) and a dynamic quantization mechanism are co-constructed. However, the triggering error and the quantization error are induced simultaneously. Meanwhile, the quantization saturation and the system instability issues are raised due to the asynchronous mode and the bandwidth-constrained network under DoS attacks. To tackle these problems, a quantization-dependent DETM is presented in terms of a quantization parameter. A dynamic quantizer with a mode-dependent variable quantization level (MDVQL) is proposed. The constraint conditions on the quantization level and the event-triggered parameters are obtained to ensure the unsaturation of the quantizer, and sufficient conditions are provided for the exponential stability of the switched systems. Lastly, simulation examples are carried out to verify the effectiveness of the theoretical results and show the merits of the proposed methods for saving communication bandwidth.