Secure Strategy Design for Networked Control Systems under Multiple Cyber-attacks over a Multi-channel Framework

This article is concerned with the secure strategy design for a class of discrete-time linear networked control systems subject to multiple cyber-attacks over a multi-channel framework. The multiple cyber-attacks discussed are groups of different attacks, which are random in sequence and can happen in any channel independently or simultaneously. No priority and duration limits are required for each type of attack in the multiple cyber-attacks, the dynamics of which are modeled by a Markovian chain. Moreover, a Bernoulli process is introduced to describe the channel conditions under attacks. A secure strategy based on Markovian-based observer is designed to guarantee the stability of the system with the ability to resist interference and adapt to multiple cyber-attacks. Finally, simulations are presented to verify the effectiveness of the proposed method.