Abstract
This paper studies an approach for detecting cyber attacks against networked cooperative systems (NCS) that are assumed to be working in a cyber-physical environment. NCS are prone to anomalies both due to cyber and physical attacks and faults. Cyber-attacks being more hazardous given the cooperative nature of the NCS may lead to disastrous consequences and thus need to be detected as soon as they occur by all systems in the network. Our approach deals with two types of malicious attacks aimed at compromising the stability of the NCS: intrusion attacks/local malfunctions on individual systems and deception/cyber-attacks on the communication between the systems. In order to detect and identify such attacks under switching communication topologies, this paper proposes a new distributed methodology that solves global state estimation of the NCS where the aim is identifying anomalies in the networked system using residuals generated by monitoring agents such that coverage of the entire network is assured. A cascade of predefined-time sliding mode switched observers is introduced for each agent to achieve a fast estimate of the global state whereby the settling time is an a priori defined parameter independently of the initial conditions. Then, using the conventional consensus algorithm, a set of residuals are generated by the agents that is capable of detecting and isolating local intrusion attacks and communication cyber-attacks in the network using only locally exchanged information. In order to prove the effectiveness of the proposed method, the framework is tested for a velocity synchronization seeking network of mobile robots.
Highlights
Networked Control Systems are control systems where the control loops are closed through a communication network whereby necessary signals for the control mission are exchanged among the system components through a network, namely wireless
Electronics 2020, 9, 1912 years due to their numerous potential use in various applications and industries ranging from flocking of mobile vehicles, terrestrial exploration, manufacturing plant monitoring, formation control in spacecraft flights to unmanned aerial vehicles and autonomous underwater vehicles, just to mention a few
A novel distributed cyber-attack identification scheme was proposed for networked cooperative systems (NCS) with switching topologies subject to cyber-attacks, where any agent/node can act as a monitor to the whole system behavior and can detect and identify intrusion and cyber attacks
Summary
Networked Control Systems are control systems where the control loops are closed through a communication network whereby necessary signals for the control mission are exchanged among the system components through a network, namely wireless. These systems, sometimes referred to as cyber-physical systems (CFS) [1,2]. Multi-agent systems (MAS) in the literature [3], have attracted a lot of research interest in recent. The nature of NCS makes them extremely vulnerable to external malicious attacks while sharing information through a wireless network, which may compromise the efficiency of cooperative control algorithms and can lead to heavily degraded performances of the overall system and possibly to catastrophic effects. The issue of cyber security in such systems has been attracting considerable attention in the literature [10,11]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
