State Estimation-Based Security Control for Networked Systems Under Hybrid Attacks

Abstract

This paper is concerned with the security control of networked systems under denial of attacks and false data injection attacks. Firstly, an observer is designed to estimate the system state under hybrid attacks, and the system is modelled as a stochastic closed-loop system with an observer-based security controller. Then, by use of the Lyapunov theory, sufficient security stability and stabilization criteria are derived to ensure the asymptotically stable of the studied system in the mean-square sense under hybrid attacks. Finally, an example is given to illustrate the effectiveness of developed method.